drainage system
TRANSCRIPT
DRAINAGE SYSTEM
Building Services
DRAINAGE SYSTEM
basically refers to All the piping within the private and public premises which conveys sewage rainwater and other liquid waste to a point of disposal A drainage system does not include the mains of public sewer systems or a private or a public sewage treatment or disposal plant
STACK
A general term used for any vertical line of soil waste or vent piping
SOIL PIPE
A pipe that conveys the discharge of Black water (liquids containing fecal matter)
WASTE PIPE
A pipe that conveys the disvharge of only Grey Water ( liquid waste free of fecal matter )
A waste pipe is generally smaller than a soil pipe because of the nature of matter being discharged into the system
BRANCH
Any part of the piping system other than the main riser or stack
BUILDINGHOUSE DRAIN
That part of the lowest horizontal piping of a plumbing system which receives the discharge from soil waste and other drainage pipes inside a building and conveys it to the building sewerhouse sewer
BUILDINGHOUSE SEWER
That part of the drainage system that extends from the end of the building drain
and conveys its discharge to the public sewer private sewer individual sewage
disposal system or other appropriate point of disposal
SOIL STACK
Parts of a Drainage
System
1048708 ESSENTIAL
COMPONENTS
ndash House Sewer
ndash House Drain
ndash House Trap
ndash Fresh-air inlet
ndash Soil and Waste Stacks
ndash Fixture Branches
ndash Traps
ndash Vents
1048708 SPECIAL DEVICES
ndash Interceptors
ndash Sumps and Ejectors
ndash Backwater Valves
ndash Roof and Floor Drains
House Sewer
ndash It extends from the public sewer to the private
sewage-disposal tank to the wall of the structure
and is entirely outside the building
- Plastic pipe ndash10rsquo to 20rsquo long
ndash 12rdquo deep with concrete pavement
ndash 18rdquo deep without concrete covering
ndash Slope at 18rdquo or frac14rdquo to the foot
ESSENTIAL COMPONENTS
OF DRAINAGE SYSTEM
House Drain
ndash The horizontal main into which the
vertical soil and waste stacks
discharge It connects directly to the
house sewer
ndash Sanitary drain
ndash Leader drain
bull Copper
bull Plastic
bull Extra heavy cast-iron
ndash Slope at 18rdquo or frac14rdquo per foot
ndash A cleanout at the cellarbasement
wall is recommended to clear
obstructions
ndash A cleanout at the foot of each waste
and soil stack should be installed
Fresh-air inlet
ndash It is intended to admit fresh air to
the drainage system so that there
will be a free circulation without
compression
throughout the house drain and
stacks discharging above the roof
ndash A necessary adjunct to the house
trap
Soil and Waste Stacks
ndash The soil and waste stacks collect
the sewage from the fixtures through
their branches
bull Should rest solidly at the bottom on
masonry piers or heavy posts
bull The upper ends should extend
through the roof for ventilation
bull Made of heavy cast-iron copper
plastic
bull Supported at intervals of 10rsquo with
stout wall hangers or brackets or on
beams
bull Min 4rdquo Oslash 1rsquo below the roof
bull It should be straight free of bends
and turns
Fixture Branches
ndash Connect the fixtures
with the stacks
ndash Waste or soil
branches are
connected to the trap
of each
fixture
ndash 18rdquo ndash frac12rdquo per foot
ndash Horizontal branch should not be
more than 5rsquo (from the vertical inlet of
the trap to the vent opening
ndash Cast-iron plastic copper or
galvanized steel
Traps
ndash Traps catches water
after each discharge
from a
fixture so as not to allow
unpleasant ad
obnoxious
gases in a sanitary
drainage system to
escape
through the fixture
ndash All fixtures are to be
provided with its own
trap except for
three laundry and
kitchen sinks connected
to a single trap
ndash Trap seal must have a min depth
of 2rdquo and max of 4rdquo depth
ndash Placed within 2rsquo of the fixture
accessible for cleaning through its
bottom with a plug
ndash Made of steel cast-iron copper
plastic and brass except those in
urinals and water closets which
are made of vitreous china cast
integrally with the fixture
Vents
ndash Vents are the extension of soil and
waste stacks through the roof and a
system of pipes largely paralleling the
drainage system for the admission of
air and discharging of gases
SPECIAL DEVICES IN
DRAINAGE SYSTEM
Interceptors
ndash device designed and installed so as
to separate and retain deleterious
hazardous or undesirable matter
from normal waste and permit normal
sewage or liquid waste to discharge
into the disposal terminal by gravity
Sump and Ejectors
ndash A sump is a tank or a pit which
receives sewage or liquid waste
located below the normal grade
of the gravity system and must be
emptied by a mechanical means
ndash Sewage ejectors may be motor-
driven centrifugal pumps or they may
be operated by compressed air
Ejector pump for submersible system
Ejector for Vertical lift submerge pump
Backwater valvescheck valve
ndash A backwater valve closes to prevent reverse
flow from a sewer to low facilities when there
is a heavy drainage load for short periods that
can cause building up and over flow of wastes
Roof Drain
ndash Is a receptacle designed to collect
surface or rain water from an open
area and discharge to a catch basin
Floor Drain
ndash Is any pipe which carries water or
waterborne wastes in a building
drainage system
Sizing rain water piping
Local regulations on the disposal of rain or storm water are apt to vary Some places permit this water to run off into the septic tank or public or private sewer others insist that it be drained into a dry well Regardless of which rule prevails it is recommended that rain water be kept separate from sewage and that a separate pipe be used to connect the drained area with the disposal area If this is done the rain-water drainage piping can be a smaller more economical size and the danger of flooding the sewage system during a cloudburst or thunder shower is eliminated
Storm-water piping size is determined by the area drained in horizontal projection that is the flat area in square feet on which rain may fall Measurements of roof and other such areas may be estimated but in doubtful cases the larger of two possible pipe sizes should be used
Sizing house drain
The size of pipe to be used in a house drain is determined by the number of units drained by it Proper diameters are for 2 units 1 12 for 9 units 2 for 25 units 2 12
The size of any stack house drain or sewer must be however at least the size of the largest branch connected to it The minimum size of a house drain receiving the discharge from a water closet should be 4 in diameter and this pipe should continue full size to the vertical stacks receiving the discharge of water closets Even without any water closets discharging into a system the drainage system should have at least one 3 diameter stack extended full size through the roof
DRAINAGE SYSTEM
basically refers to All the piping within the private and public premises which conveys sewage rainwater and other liquid waste to a point of disposal A drainage system does not include the mains of public sewer systems or a private or a public sewage treatment or disposal plant
STACK
A general term used for any vertical line of soil waste or vent piping
SOIL PIPE
A pipe that conveys the discharge of Black water (liquids containing fecal matter)
WASTE PIPE
A pipe that conveys the disvharge of only Grey Water ( liquid waste free of fecal matter )
A waste pipe is generally smaller than a soil pipe because of the nature of matter being discharged into the system
BRANCH
Any part of the piping system other than the main riser or stack
BUILDINGHOUSE DRAIN
That part of the lowest horizontal piping of a plumbing system which receives the discharge from soil waste and other drainage pipes inside a building and conveys it to the building sewerhouse sewer
BUILDINGHOUSE SEWER
That part of the drainage system that extends from the end of the building drain
and conveys its discharge to the public sewer private sewer individual sewage
disposal system or other appropriate point of disposal
SOIL STACK
Parts of a Drainage
System
1048708 ESSENTIAL
COMPONENTS
ndash House Sewer
ndash House Drain
ndash House Trap
ndash Fresh-air inlet
ndash Soil and Waste Stacks
ndash Fixture Branches
ndash Traps
ndash Vents
1048708 SPECIAL DEVICES
ndash Interceptors
ndash Sumps and Ejectors
ndash Backwater Valves
ndash Roof and Floor Drains
House Sewer
ndash It extends from the public sewer to the private
sewage-disposal tank to the wall of the structure
and is entirely outside the building
- Plastic pipe ndash10rsquo to 20rsquo long
ndash 12rdquo deep with concrete pavement
ndash 18rdquo deep without concrete covering
ndash Slope at 18rdquo or frac14rdquo to the foot
ESSENTIAL COMPONENTS
OF DRAINAGE SYSTEM
House Drain
ndash The horizontal main into which the
vertical soil and waste stacks
discharge It connects directly to the
house sewer
ndash Sanitary drain
ndash Leader drain
bull Copper
bull Plastic
bull Extra heavy cast-iron
ndash Slope at 18rdquo or frac14rdquo per foot
ndash A cleanout at the cellarbasement
wall is recommended to clear
obstructions
ndash A cleanout at the foot of each waste
and soil stack should be installed
Fresh-air inlet
ndash It is intended to admit fresh air to
the drainage system so that there
will be a free circulation without
compression
throughout the house drain and
stacks discharging above the roof
ndash A necessary adjunct to the house
trap
Soil and Waste Stacks
ndash The soil and waste stacks collect
the sewage from the fixtures through
their branches
bull Should rest solidly at the bottom on
masonry piers or heavy posts
bull The upper ends should extend
through the roof for ventilation
bull Made of heavy cast-iron copper
plastic
bull Supported at intervals of 10rsquo with
stout wall hangers or brackets or on
beams
bull Min 4rdquo Oslash 1rsquo below the roof
bull It should be straight free of bends
and turns
Fixture Branches
ndash Connect the fixtures
with the stacks
ndash Waste or soil
branches are
connected to the trap
of each
fixture
ndash 18rdquo ndash frac12rdquo per foot
ndash Horizontal branch should not be
more than 5rsquo (from the vertical inlet of
the trap to the vent opening
ndash Cast-iron plastic copper or
galvanized steel
Traps
ndash Traps catches water
after each discharge
from a
fixture so as not to allow
unpleasant ad
obnoxious
gases in a sanitary
drainage system to
escape
through the fixture
ndash All fixtures are to be
provided with its own
trap except for
three laundry and
kitchen sinks connected
to a single trap
ndash Trap seal must have a min depth
of 2rdquo and max of 4rdquo depth
ndash Placed within 2rsquo of the fixture
accessible for cleaning through its
bottom with a plug
ndash Made of steel cast-iron copper
plastic and brass except those in
urinals and water closets which
are made of vitreous china cast
integrally with the fixture
Vents
ndash Vents are the extension of soil and
waste stacks through the roof and a
system of pipes largely paralleling the
drainage system for the admission of
air and discharging of gases
SPECIAL DEVICES IN
DRAINAGE SYSTEM
Interceptors
ndash device designed and installed so as
to separate and retain deleterious
hazardous or undesirable matter
from normal waste and permit normal
sewage or liquid waste to discharge
into the disposal terminal by gravity
Sump and Ejectors
ndash A sump is a tank or a pit which
receives sewage or liquid waste
located below the normal grade
of the gravity system and must be
emptied by a mechanical means
ndash Sewage ejectors may be motor-
driven centrifugal pumps or they may
be operated by compressed air
Ejector pump for submersible system
Ejector for Vertical lift submerge pump
Backwater valvescheck valve
ndash A backwater valve closes to prevent reverse
flow from a sewer to low facilities when there
is a heavy drainage load for short periods that
can cause building up and over flow of wastes
Roof Drain
ndash Is a receptacle designed to collect
surface or rain water from an open
area and discharge to a catch basin
Floor Drain
ndash Is any pipe which carries water or
waterborne wastes in a building
drainage system
Sizing rain water piping
Local regulations on the disposal of rain or storm water are apt to vary Some places permit this water to run off into the septic tank or public or private sewer others insist that it be drained into a dry well Regardless of which rule prevails it is recommended that rain water be kept separate from sewage and that a separate pipe be used to connect the drained area with the disposal area If this is done the rain-water drainage piping can be a smaller more economical size and the danger of flooding the sewage system during a cloudburst or thunder shower is eliminated
Storm-water piping size is determined by the area drained in horizontal projection that is the flat area in square feet on which rain may fall Measurements of roof and other such areas may be estimated but in doubtful cases the larger of two possible pipe sizes should be used
Sizing house drain
The size of pipe to be used in a house drain is determined by the number of units drained by it Proper diameters are for 2 units 1 12 for 9 units 2 for 25 units 2 12
The size of any stack house drain or sewer must be however at least the size of the largest branch connected to it The minimum size of a house drain receiving the discharge from a water closet should be 4 in diameter and this pipe should continue full size to the vertical stacks receiving the discharge of water closets Even without any water closets discharging into a system the drainage system should have at least one 3 diameter stack extended full size through the roof
BUILDINGHOUSE SEWER
That part of the drainage system that extends from the end of the building drain
and conveys its discharge to the public sewer private sewer individual sewage
disposal system or other appropriate point of disposal
SOIL STACK
Parts of a Drainage
System
1048708 ESSENTIAL
COMPONENTS
ndash House Sewer
ndash House Drain
ndash House Trap
ndash Fresh-air inlet
ndash Soil and Waste Stacks
ndash Fixture Branches
ndash Traps
ndash Vents
1048708 SPECIAL DEVICES
ndash Interceptors
ndash Sumps and Ejectors
ndash Backwater Valves
ndash Roof and Floor Drains
House Sewer
ndash It extends from the public sewer to the private
sewage-disposal tank to the wall of the structure
and is entirely outside the building
- Plastic pipe ndash10rsquo to 20rsquo long
ndash 12rdquo deep with concrete pavement
ndash 18rdquo deep without concrete covering
ndash Slope at 18rdquo or frac14rdquo to the foot
ESSENTIAL COMPONENTS
OF DRAINAGE SYSTEM
House Drain
ndash The horizontal main into which the
vertical soil and waste stacks
discharge It connects directly to the
house sewer
ndash Sanitary drain
ndash Leader drain
bull Copper
bull Plastic
bull Extra heavy cast-iron
ndash Slope at 18rdquo or frac14rdquo per foot
ndash A cleanout at the cellarbasement
wall is recommended to clear
obstructions
ndash A cleanout at the foot of each waste
and soil stack should be installed
Fresh-air inlet
ndash It is intended to admit fresh air to
the drainage system so that there
will be a free circulation without
compression
throughout the house drain and
stacks discharging above the roof
ndash A necessary adjunct to the house
trap
Soil and Waste Stacks
ndash The soil and waste stacks collect
the sewage from the fixtures through
their branches
bull Should rest solidly at the bottom on
masonry piers or heavy posts
bull The upper ends should extend
through the roof for ventilation
bull Made of heavy cast-iron copper
plastic
bull Supported at intervals of 10rsquo with
stout wall hangers or brackets or on
beams
bull Min 4rdquo Oslash 1rsquo below the roof
bull It should be straight free of bends
and turns
Fixture Branches
ndash Connect the fixtures
with the stacks
ndash Waste or soil
branches are
connected to the trap
of each
fixture
ndash 18rdquo ndash frac12rdquo per foot
ndash Horizontal branch should not be
more than 5rsquo (from the vertical inlet of
the trap to the vent opening
ndash Cast-iron plastic copper or
galvanized steel
Traps
ndash Traps catches water
after each discharge
from a
fixture so as not to allow
unpleasant ad
obnoxious
gases in a sanitary
drainage system to
escape
through the fixture
ndash All fixtures are to be
provided with its own
trap except for
three laundry and
kitchen sinks connected
to a single trap
ndash Trap seal must have a min depth
of 2rdquo and max of 4rdquo depth
ndash Placed within 2rsquo of the fixture
accessible for cleaning through its
bottom with a plug
ndash Made of steel cast-iron copper
plastic and brass except those in
urinals and water closets which
are made of vitreous china cast
integrally with the fixture
Vents
ndash Vents are the extension of soil and
waste stacks through the roof and a
system of pipes largely paralleling the
drainage system for the admission of
air and discharging of gases
SPECIAL DEVICES IN
DRAINAGE SYSTEM
Interceptors
ndash device designed and installed so as
to separate and retain deleterious
hazardous or undesirable matter
from normal waste and permit normal
sewage or liquid waste to discharge
into the disposal terminal by gravity
Sump and Ejectors
ndash A sump is a tank or a pit which
receives sewage or liquid waste
located below the normal grade
of the gravity system and must be
emptied by a mechanical means
ndash Sewage ejectors may be motor-
driven centrifugal pumps or they may
be operated by compressed air
Ejector pump for submersible system
Ejector for Vertical lift submerge pump
Backwater valvescheck valve
ndash A backwater valve closes to prevent reverse
flow from a sewer to low facilities when there
is a heavy drainage load for short periods that
can cause building up and over flow of wastes
Roof Drain
ndash Is a receptacle designed to collect
surface or rain water from an open
area and discharge to a catch basin
Floor Drain
ndash Is any pipe which carries water or
waterborne wastes in a building
drainage system
Sizing rain water piping
Local regulations on the disposal of rain or storm water are apt to vary Some places permit this water to run off into the septic tank or public or private sewer others insist that it be drained into a dry well Regardless of which rule prevails it is recommended that rain water be kept separate from sewage and that a separate pipe be used to connect the drained area with the disposal area If this is done the rain-water drainage piping can be a smaller more economical size and the danger of flooding the sewage system during a cloudburst or thunder shower is eliminated
Storm-water piping size is determined by the area drained in horizontal projection that is the flat area in square feet on which rain may fall Measurements of roof and other such areas may be estimated but in doubtful cases the larger of two possible pipe sizes should be used
Sizing house drain
The size of pipe to be used in a house drain is determined by the number of units drained by it Proper diameters are for 2 units 1 12 for 9 units 2 for 25 units 2 12
The size of any stack house drain or sewer must be however at least the size of the largest branch connected to it The minimum size of a house drain receiving the discharge from a water closet should be 4 in diameter and this pipe should continue full size to the vertical stacks receiving the discharge of water closets Even without any water closets discharging into a system the drainage system should have at least one 3 diameter stack extended full size through the roof
SOIL STACK
Parts of a Drainage
System
1048708 ESSENTIAL
COMPONENTS
ndash House Sewer
ndash House Drain
ndash House Trap
ndash Fresh-air inlet
ndash Soil and Waste Stacks
ndash Fixture Branches
ndash Traps
ndash Vents
1048708 SPECIAL DEVICES
ndash Interceptors
ndash Sumps and Ejectors
ndash Backwater Valves
ndash Roof and Floor Drains
House Sewer
ndash It extends from the public sewer to the private
sewage-disposal tank to the wall of the structure
and is entirely outside the building
- Plastic pipe ndash10rsquo to 20rsquo long
ndash 12rdquo deep with concrete pavement
ndash 18rdquo deep without concrete covering
ndash Slope at 18rdquo or frac14rdquo to the foot
ESSENTIAL COMPONENTS
OF DRAINAGE SYSTEM
House Drain
ndash The horizontal main into which the
vertical soil and waste stacks
discharge It connects directly to the
house sewer
ndash Sanitary drain
ndash Leader drain
bull Copper
bull Plastic
bull Extra heavy cast-iron
ndash Slope at 18rdquo or frac14rdquo per foot
ndash A cleanout at the cellarbasement
wall is recommended to clear
obstructions
ndash A cleanout at the foot of each waste
and soil stack should be installed
Fresh-air inlet
ndash It is intended to admit fresh air to
the drainage system so that there
will be a free circulation without
compression
throughout the house drain and
stacks discharging above the roof
ndash A necessary adjunct to the house
trap
Soil and Waste Stacks
ndash The soil and waste stacks collect
the sewage from the fixtures through
their branches
bull Should rest solidly at the bottom on
masonry piers or heavy posts
bull The upper ends should extend
through the roof for ventilation
bull Made of heavy cast-iron copper
plastic
bull Supported at intervals of 10rsquo with
stout wall hangers or brackets or on
beams
bull Min 4rdquo Oslash 1rsquo below the roof
bull It should be straight free of bends
and turns
Fixture Branches
ndash Connect the fixtures
with the stacks
ndash Waste or soil
branches are
connected to the trap
of each
fixture
ndash 18rdquo ndash frac12rdquo per foot
ndash Horizontal branch should not be
more than 5rsquo (from the vertical inlet of
the trap to the vent opening
ndash Cast-iron plastic copper or
galvanized steel
Traps
ndash Traps catches water
after each discharge
from a
fixture so as not to allow
unpleasant ad
obnoxious
gases in a sanitary
drainage system to
escape
through the fixture
ndash All fixtures are to be
provided with its own
trap except for
three laundry and
kitchen sinks connected
to a single trap
ndash Trap seal must have a min depth
of 2rdquo and max of 4rdquo depth
ndash Placed within 2rsquo of the fixture
accessible for cleaning through its
bottom with a plug
ndash Made of steel cast-iron copper
plastic and brass except those in
urinals and water closets which
are made of vitreous china cast
integrally with the fixture
Vents
ndash Vents are the extension of soil and
waste stacks through the roof and a
system of pipes largely paralleling the
drainage system for the admission of
air and discharging of gases
SPECIAL DEVICES IN
DRAINAGE SYSTEM
Interceptors
ndash device designed and installed so as
to separate and retain deleterious
hazardous or undesirable matter
from normal waste and permit normal
sewage or liquid waste to discharge
into the disposal terminal by gravity
Sump and Ejectors
ndash A sump is a tank or a pit which
receives sewage or liquid waste
located below the normal grade
of the gravity system and must be
emptied by a mechanical means
ndash Sewage ejectors may be motor-
driven centrifugal pumps or they may
be operated by compressed air
Ejector pump for submersible system
Ejector for Vertical lift submerge pump
Backwater valvescheck valve
ndash A backwater valve closes to prevent reverse
flow from a sewer to low facilities when there
is a heavy drainage load for short periods that
can cause building up and over flow of wastes
Roof Drain
ndash Is a receptacle designed to collect
surface or rain water from an open
area and discharge to a catch basin
Floor Drain
ndash Is any pipe which carries water or
waterborne wastes in a building
drainage system
Sizing rain water piping
Local regulations on the disposal of rain or storm water are apt to vary Some places permit this water to run off into the septic tank or public or private sewer others insist that it be drained into a dry well Regardless of which rule prevails it is recommended that rain water be kept separate from sewage and that a separate pipe be used to connect the drained area with the disposal area If this is done the rain-water drainage piping can be a smaller more economical size and the danger of flooding the sewage system during a cloudburst or thunder shower is eliminated
Storm-water piping size is determined by the area drained in horizontal projection that is the flat area in square feet on which rain may fall Measurements of roof and other such areas may be estimated but in doubtful cases the larger of two possible pipe sizes should be used
Sizing house drain
The size of pipe to be used in a house drain is determined by the number of units drained by it Proper diameters are for 2 units 1 12 for 9 units 2 for 25 units 2 12
The size of any stack house drain or sewer must be however at least the size of the largest branch connected to it The minimum size of a house drain receiving the discharge from a water closet should be 4 in diameter and this pipe should continue full size to the vertical stacks receiving the discharge of water closets Even without any water closets discharging into a system the drainage system should have at least one 3 diameter stack extended full size through the roof
Parts of a Drainage
System
1048708 ESSENTIAL
COMPONENTS
ndash House Sewer
ndash House Drain
ndash House Trap
ndash Fresh-air inlet
ndash Soil and Waste Stacks
ndash Fixture Branches
ndash Traps
ndash Vents
1048708 SPECIAL DEVICES
ndash Interceptors
ndash Sumps and Ejectors
ndash Backwater Valves
ndash Roof and Floor Drains
House Sewer
ndash It extends from the public sewer to the private
sewage-disposal tank to the wall of the structure
and is entirely outside the building
- Plastic pipe ndash10rsquo to 20rsquo long
ndash 12rdquo deep with concrete pavement
ndash 18rdquo deep without concrete covering
ndash Slope at 18rdquo or frac14rdquo to the foot
ESSENTIAL COMPONENTS
OF DRAINAGE SYSTEM
House Drain
ndash The horizontal main into which the
vertical soil and waste stacks
discharge It connects directly to the
house sewer
ndash Sanitary drain
ndash Leader drain
bull Copper
bull Plastic
bull Extra heavy cast-iron
ndash Slope at 18rdquo or frac14rdquo per foot
ndash A cleanout at the cellarbasement
wall is recommended to clear
obstructions
ndash A cleanout at the foot of each waste
and soil stack should be installed
Fresh-air inlet
ndash It is intended to admit fresh air to
the drainage system so that there
will be a free circulation without
compression
throughout the house drain and
stacks discharging above the roof
ndash A necessary adjunct to the house
trap
Soil and Waste Stacks
ndash The soil and waste stacks collect
the sewage from the fixtures through
their branches
bull Should rest solidly at the bottom on
masonry piers or heavy posts
bull The upper ends should extend
through the roof for ventilation
bull Made of heavy cast-iron copper
plastic
bull Supported at intervals of 10rsquo with
stout wall hangers or brackets or on
beams
bull Min 4rdquo Oslash 1rsquo below the roof
bull It should be straight free of bends
and turns
Fixture Branches
ndash Connect the fixtures
with the stacks
ndash Waste or soil
branches are
connected to the trap
of each
fixture
ndash 18rdquo ndash frac12rdquo per foot
ndash Horizontal branch should not be
more than 5rsquo (from the vertical inlet of
the trap to the vent opening
ndash Cast-iron plastic copper or
galvanized steel
Traps
ndash Traps catches water
after each discharge
from a
fixture so as not to allow
unpleasant ad
obnoxious
gases in a sanitary
drainage system to
escape
through the fixture
ndash All fixtures are to be
provided with its own
trap except for
three laundry and
kitchen sinks connected
to a single trap
ndash Trap seal must have a min depth
of 2rdquo and max of 4rdquo depth
ndash Placed within 2rsquo of the fixture
accessible for cleaning through its
bottom with a plug
ndash Made of steel cast-iron copper
plastic and brass except those in
urinals and water closets which
are made of vitreous china cast
integrally with the fixture
Vents
ndash Vents are the extension of soil and
waste stacks through the roof and a
system of pipes largely paralleling the
drainage system for the admission of
air and discharging of gases
SPECIAL DEVICES IN
DRAINAGE SYSTEM
Interceptors
ndash device designed and installed so as
to separate and retain deleterious
hazardous or undesirable matter
from normal waste and permit normal
sewage or liquid waste to discharge
into the disposal terminal by gravity
Sump and Ejectors
ndash A sump is a tank or a pit which
receives sewage or liquid waste
located below the normal grade
of the gravity system and must be
emptied by a mechanical means
ndash Sewage ejectors may be motor-
driven centrifugal pumps or they may
be operated by compressed air
Ejector pump for submersible system
Ejector for Vertical lift submerge pump
Backwater valvescheck valve
ndash A backwater valve closes to prevent reverse
flow from a sewer to low facilities when there
is a heavy drainage load for short periods that
can cause building up and over flow of wastes
Roof Drain
ndash Is a receptacle designed to collect
surface or rain water from an open
area and discharge to a catch basin
Floor Drain
ndash Is any pipe which carries water or
waterborne wastes in a building
drainage system
Sizing rain water piping
Local regulations on the disposal of rain or storm water are apt to vary Some places permit this water to run off into the septic tank or public or private sewer others insist that it be drained into a dry well Regardless of which rule prevails it is recommended that rain water be kept separate from sewage and that a separate pipe be used to connect the drained area with the disposal area If this is done the rain-water drainage piping can be a smaller more economical size and the danger of flooding the sewage system during a cloudburst or thunder shower is eliminated
Storm-water piping size is determined by the area drained in horizontal projection that is the flat area in square feet on which rain may fall Measurements of roof and other such areas may be estimated but in doubtful cases the larger of two possible pipe sizes should be used
Sizing house drain
The size of pipe to be used in a house drain is determined by the number of units drained by it Proper diameters are for 2 units 1 12 for 9 units 2 for 25 units 2 12
The size of any stack house drain or sewer must be however at least the size of the largest branch connected to it The minimum size of a house drain receiving the discharge from a water closet should be 4 in diameter and this pipe should continue full size to the vertical stacks receiving the discharge of water closets Even without any water closets discharging into a system the drainage system should have at least one 3 diameter stack extended full size through the roof
ESSENTIAL COMPONENTS
OF DRAINAGE SYSTEM
House Drain
ndash The horizontal main into which the
vertical soil and waste stacks
discharge It connects directly to the
house sewer
ndash Sanitary drain
ndash Leader drain
bull Copper
bull Plastic
bull Extra heavy cast-iron
ndash Slope at 18rdquo or frac14rdquo per foot
ndash A cleanout at the cellarbasement
wall is recommended to clear
obstructions
ndash A cleanout at the foot of each waste
and soil stack should be installed
Fresh-air inlet
ndash It is intended to admit fresh air to
the drainage system so that there
will be a free circulation without
compression
throughout the house drain and
stacks discharging above the roof
ndash A necessary adjunct to the house
trap
Soil and Waste Stacks
ndash The soil and waste stacks collect
the sewage from the fixtures through
their branches
bull Should rest solidly at the bottom on
masonry piers or heavy posts
bull The upper ends should extend
through the roof for ventilation
bull Made of heavy cast-iron copper
plastic
bull Supported at intervals of 10rsquo with
stout wall hangers or brackets or on
beams
bull Min 4rdquo Oslash 1rsquo below the roof
bull It should be straight free of bends
and turns
Fixture Branches
ndash Connect the fixtures
with the stacks
ndash Waste or soil
branches are
connected to the trap
of each
fixture
ndash 18rdquo ndash frac12rdquo per foot
ndash Horizontal branch should not be
more than 5rsquo (from the vertical inlet of
the trap to the vent opening
ndash Cast-iron plastic copper or
galvanized steel
Traps
ndash Traps catches water
after each discharge
from a
fixture so as not to allow
unpleasant ad
obnoxious
gases in a sanitary
drainage system to
escape
through the fixture
ndash All fixtures are to be
provided with its own
trap except for
three laundry and
kitchen sinks connected
to a single trap
ndash Trap seal must have a min depth
of 2rdquo and max of 4rdquo depth
ndash Placed within 2rsquo of the fixture
accessible for cleaning through its
bottom with a plug
ndash Made of steel cast-iron copper
plastic and brass except those in
urinals and water closets which
are made of vitreous china cast
integrally with the fixture
Vents
ndash Vents are the extension of soil and
waste stacks through the roof and a
system of pipes largely paralleling the
drainage system for the admission of
air and discharging of gases
SPECIAL DEVICES IN
DRAINAGE SYSTEM
Interceptors
ndash device designed and installed so as
to separate and retain deleterious
hazardous or undesirable matter
from normal waste and permit normal
sewage or liquid waste to discharge
into the disposal terminal by gravity
Sump and Ejectors
ndash A sump is a tank or a pit which
receives sewage or liquid waste
located below the normal grade
of the gravity system and must be
emptied by a mechanical means
ndash Sewage ejectors may be motor-
driven centrifugal pumps or they may
be operated by compressed air
Ejector pump for submersible system
Ejector for Vertical lift submerge pump
Backwater valvescheck valve
ndash A backwater valve closes to prevent reverse
flow from a sewer to low facilities when there
is a heavy drainage load for short periods that
can cause building up and over flow of wastes
Roof Drain
ndash Is a receptacle designed to collect
surface or rain water from an open
area and discharge to a catch basin
Floor Drain
ndash Is any pipe which carries water or
waterborne wastes in a building
drainage system
Sizing rain water piping
Local regulations on the disposal of rain or storm water are apt to vary Some places permit this water to run off into the septic tank or public or private sewer others insist that it be drained into a dry well Regardless of which rule prevails it is recommended that rain water be kept separate from sewage and that a separate pipe be used to connect the drained area with the disposal area If this is done the rain-water drainage piping can be a smaller more economical size and the danger of flooding the sewage system during a cloudburst or thunder shower is eliminated
Storm-water piping size is determined by the area drained in horizontal projection that is the flat area in square feet on which rain may fall Measurements of roof and other such areas may be estimated but in doubtful cases the larger of two possible pipe sizes should be used
Sizing house drain
The size of pipe to be used in a house drain is determined by the number of units drained by it Proper diameters are for 2 units 1 12 for 9 units 2 for 25 units 2 12
The size of any stack house drain or sewer must be however at least the size of the largest branch connected to it The minimum size of a house drain receiving the discharge from a water closet should be 4 in diameter and this pipe should continue full size to the vertical stacks receiving the discharge of water closets Even without any water closets discharging into a system the drainage system should have at least one 3 diameter stack extended full size through the roof
House Drain
ndash The horizontal main into which the
vertical soil and waste stacks
discharge It connects directly to the
house sewer
ndash Sanitary drain
ndash Leader drain
bull Copper
bull Plastic
bull Extra heavy cast-iron
ndash Slope at 18rdquo or frac14rdquo per foot
ndash A cleanout at the cellarbasement
wall is recommended to clear
obstructions
ndash A cleanout at the foot of each waste
and soil stack should be installed
Fresh-air inlet
ndash It is intended to admit fresh air to
the drainage system so that there
will be a free circulation without
compression
throughout the house drain and
stacks discharging above the roof
ndash A necessary adjunct to the house
trap
Soil and Waste Stacks
ndash The soil and waste stacks collect
the sewage from the fixtures through
their branches
bull Should rest solidly at the bottom on
masonry piers or heavy posts
bull The upper ends should extend
through the roof for ventilation
bull Made of heavy cast-iron copper
plastic
bull Supported at intervals of 10rsquo with
stout wall hangers or brackets or on
beams
bull Min 4rdquo Oslash 1rsquo below the roof
bull It should be straight free of bends
and turns
Fixture Branches
ndash Connect the fixtures
with the stacks
ndash Waste or soil
branches are
connected to the trap
of each
fixture
ndash 18rdquo ndash frac12rdquo per foot
ndash Horizontal branch should not be
more than 5rsquo (from the vertical inlet of
the trap to the vent opening
ndash Cast-iron plastic copper or
galvanized steel
Traps
ndash Traps catches water
after each discharge
from a
fixture so as not to allow
unpleasant ad
obnoxious
gases in a sanitary
drainage system to
escape
through the fixture
ndash All fixtures are to be
provided with its own
trap except for
three laundry and
kitchen sinks connected
to a single trap
ndash Trap seal must have a min depth
of 2rdquo and max of 4rdquo depth
ndash Placed within 2rsquo of the fixture
accessible for cleaning through its
bottom with a plug
ndash Made of steel cast-iron copper
plastic and brass except those in
urinals and water closets which
are made of vitreous china cast
integrally with the fixture
Vents
ndash Vents are the extension of soil and
waste stacks through the roof and a
system of pipes largely paralleling the
drainage system for the admission of
air and discharging of gases
SPECIAL DEVICES IN
DRAINAGE SYSTEM
Interceptors
ndash device designed and installed so as
to separate and retain deleterious
hazardous or undesirable matter
from normal waste and permit normal
sewage or liquid waste to discharge
into the disposal terminal by gravity
Sump and Ejectors
ndash A sump is a tank or a pit which
receives sewage or liquid waste
located below the normal grade
of the gravity system and must be
emptied by a mechanical means
ndash Sewage ejectors may be motor-
driven centrifugal pumps or they may
be operated by compressed air
Ejector pump for submersible system
Ejector for Vertical lift submerge pump
Backwater valvescheck valve
ndash A backwater valve closes to prevent reverse
flow from a sewer to low facilities when there
is a heavy drainage load for short periods that
can cause building up and over flow of wastes
Roof Drain
ndash Is a receptacle designed to collect
surface or rain water from an open
area and discharge to a catch basin
Floor Drain
ndash Is any pipe which carries water or
waterborne wastes in a building
drainage system
Sizing rain water piping
Local regulations on the disposal of rain or storm water are apt to vary Some places permit this water to run off into the septic tank or public or private sewer others insist that it be drained into a dry well Regardless of which rule prevails it is recommended that rain water be kept separate from sewage and that a separate pipe be used to connect the drained area with the disposal area If this is done the rain-water drainage piping can be a smaller more economical size and the danger of flooding the sewage system during a cloudburst or thunder shower is eliminated
Storm-water piping size is determined by the area drained in horizontal projection that is the flat area in square feet on which rain may fall Measurements of roof and other such areas may be estimated but in doubtful cases the larger of two possible pipe sizes should be used
Sizing house drain
The size of pipe to be used in a house drain is determined by the number of units drained by it Proper diameters are for 2 units 1 12 for 9 units 2 for 25 units 2 12
The size of any stack house drain or sewer must be however at least the size of the largest branch connected to it The minimum size of a house drain receiving the discharge from a water closet should be 4 in diameter and this pipe should continue full size to the vertical stacks receiving the discharge of water closets Even without any water closets discharging into a system the drainage system should have at least one 3 diameter stack extended full size through the roof
Soil and Waste Stacks
ndash The soil and waste stacks collect
the sewage from the fixtures through
their branches
bull Should rest solidly at the bottom on
masonry piers or heavy posts
bull The upper ends should extend
through the roof for ventilation
bull Made of heavy cast-iron copper
plastic
bull Supported at intervals of 10rsquo with
stout wall hangers or brackets or on
beams
bull Min 4rdquo Oslash 1rsquo below the roof
bull It should be straight free of bends
and turns
Fixture Branches
ndash Connect the fixtures
with the stacks
ndash Waste or soil
branches are
connected to the trap
of each
fixture
ndash 18rdquo ndash frac12rdquo per foot
ndash Horizontal branch should not be
more than 5rsquo (from the vertical inlet of
the trap to the vent opening
ndash Cast-iron plastic copper or
galvanized steel
Traps
ndash Traps catches water
after each discharge
from a
fixture so as not to allow
unpleasant ad
obnoxious
gases in a sanitary
drainage system to
escape
through the fixture
ndash All fixtures are to be
provided with its own
trap except for
three laundry and
kitchen sinks connected
to a single trap
ndash Trap seal must have a min depth
of 2rdquo and max of 4rdquo depth
ndash Placed within 2rsquo of the fixture
accessible for cleaning through its
bottom with a plug
ndash Made of steel cast-iron copper
plastic and brass except those in
urinals and water closets which
are made of vitreous china cast
integrally with the fixture
Vents
ndash Vents are the extension of soil and
waste stacks through the roof and a
system of pipes largely paralleling the
drainage system for the admission of
air and discharging of gases
SPECIAL DEVICES IN
DRAINAGE SYSTEM
Interceptors
ndash device designed and installed so as
to separate and retain deleterious
hazardous or undesirable matter
from normal waste and permit normal
sewage or liquid waste to discharge
into the disposal terminal by gravity
Sump and Ejectors
ndash A sump is a tank or a pit which
receives sewage or liquid waste
located below the normal grade
of the gravity system and must be
emptied by a mechanical means
ndash Sewage ejectors may be motor-
driven centrifugal pumps or they may
be operated by compressed air
Ejector pump for submersible system
Ejector for Vertical lift submerge pump
Backwater valvescheck valve
ndash A backwater valve closes to prevent reverse
flow from a sewer to low facilities when there
is a heavy drainage load for short periods that
can cause building up and over flow of wastes
Roof Drain
ndash Is a receptacle designed to collect
surface or rain water from an open
area and discharge to a catch basin
Floor Drain
ndash Is any pipe which carries water or
waterborne wastes in a building
drainage system
Sizing rain water piping
Local regulations on the disposal of rain or storm water are apt to vary Some places permit this water to run off into the septic tank or public or private sewer others insist that it be drained into a dry well Regardless of which rule prevails it is recommended that rain water be kept separate from sewage and that a separate pipe be used to connect the drained area with the disposal area If this is done the rain-water drainage piping can be a smaller more economical size and the danger of flooding the sewage system during a cloudburst or thunder shower is eliminated
Storm-water piping size is determined by the area drained in horizontal projection that is the flat area in square feet on which rain may fall Measurements of roof and other such areas may be estimated but in doubtful cases the larger of two possible pipe sizes should be used
Sizing house drain
The size of pipe to be used in a house drain is determined by the number of units drained by it Proper diameters are for 2 units 1 12 for 9 units 2 for 25 units 2 12
The size of any stack house drain or sewer must be however at least the size of the largest branch connected to it The minimum size of a house drain receiving the discharge from a water closet should be 4 in diameter and this pipe should continue full size to the vertical stacks receiving the discharge of water closets Even without any water closets discharging into a system the drainage system should have at least one 3 diameter stack extended full size through the roof
Fixture Branches
ndash Connect the fixtures
with the stacks
ndash Waste or soil
branches are
connected to the trap
of each
fixture
ndash 18rdquo ndash frac12rdquo per foot
ndash Horizontal branch should not be
more than 5rsquo (from the vertical inlet of
the trap to the vent opening
ndash Cast-iron plastic copper or
galvanized steel
Traps
ndash Traps catches water
after each discharge
from a
fixture so as not to allow
unpleasant ad
obnoxious
gases in a sanitary
drainage system to
escape
through the fixture
ndash All fixtures are to be
provided with its own
trap except for
three laundry and
kitchen sinks connected
to a single trap
ndash Trap seal must have a min depth
of 2rdquo and max of 4rdquo depth
ndash Placed within 2rsquo of the fixture
accessible for cleaning through its
bottom with a plug
ndash Made of steel cast-iron copper
plastic and brass except those in
urinals and water closets which
are made of vitreous china cast
integrally with the fixture
Vents
ndash Vents are the extension of soil and
waste stacks through the roof and a
system of pipes largely paralleling the
drainage system for the admission of
air and discharging of gases
SPECIAL DEVICES IN
DRAINAGE SYSTEM
Interceptors
ndash device designed and installed so as
to separate and retain deleterious
hazardous or undesirable matter
from normal waste and permit normal
sewage or liquid waste to discharge
into the disposal terminal by gravity
Sump and Ejectors
ndash A sump is a tank or a pit which
receives sewage or liquid waste
located below the normal grade
of the gravity system and must be
emptied by a mechanical means
ndash Sewage ejectors may be motor-
driven centrifugal pumps or they may
be operated by compressed air
Ejector pump for submersible system
Ejector for Vertical lift submerge pump
Backwater valvescheck valve
ndash A backwater valve closes to prevent reverse
flow from a sewer to low facilities when there
is a heavy drainage load for short periods that
can cause building up and over flow of wastes
Roof Drain
ndash Is a receptacle designed to collect
surface or rain water from an open
area and discharge to a catch basin
Floor Drain
ndash Is any pipe which carries water or
waterborne wastes in a building
drainage system
Sizing rain water piping
Local regulations on the disposal of rain or storm water are apt to vary Some places permit this water to run off into the septic tank or public or private sewer others insist that it be drained into a dry well Regardless of which rule prevails it is recommended that rain water be kept separate from sewage and that a separate pipe be used to connect the drained area with the disposal area If this is done the rain-water drainage piping can be a smaller more economical size and the danger of flooding the sewage system during a cloudburst or thunder shower is eliminated
Storm-water piping size is determined by the area drained in horizontal projection that is the flat area in square feet on which rain may fall Measurements of roof and other such areas may be estimated but in doubtful cases the larger of two possible pipe sizes should be used
Sizing house drain
The size of pipe to be used in a house drain is determined by the number of units drained by it Proper diameters are for 2 units 1 12 for 9 units 2 for 25 units 2 12
The size of any stack house drain or sewer must be however at least the size of the largest branch connected to it The minimum size of a house drain receiving the discharge from a water closet should be 4 in diameter and this pipe should continue full size to the vertical stacks receiving the discharge of water closets Even without any water closets discharging into a system the drainage system should have at least one 3 diameter stack extended full size through the roof
Traps
ndash Traps catches water
after each discharge
from a
fixture so as not to allow
unpleasant ad
obnoxious
gases in a sanitary
drainage system to
escape
through the fixture
ndash All fixtures are to be
provided with its own
trap except for
three laundry and
kitchen sinks connected
to a single trap
ndash Trap seal must have a min depth
of 2rdquo and max of 4rdquo depth
ndash Placed within 2rsquo of the fixture
accessible for cleaning through its
bottom with a plug
ndash Made of steel cast-iron copper
plastic and brass except those in
urinals and water closets which
are made of vitreous china cast
integrally with the fixture
Vents
ndash Vents are the extension of soil and
waste stacks through the roof and a
system of pipes largely paralleling the
drainage system for the admission of
air and discharging of gases
SPECIAL DEVICES IN
DRAINAGE SYSTEM
Interceptors
ndash device designed and installed so as
to separate and retain deleterious
hazardous or undesirable matter
from normal waste and permit normal
sewage or liquid waste to discharge
into the disposal terminal by gravity
Sump and Ejectors
ndash A sump is a tank or a pit which
receives sewage or liquid waste
located below the normal grade
of the gravity system and must be
emptied by a mechanical means
ndash Sewage ejectors may be motor-
driven centrifugal pumps or they may
be operated by compressed air
Ejector pump for submersible system
Ejector for Vertical lift submerge pump
Backwater valvescheck valve
ndash A backwater valve closes to prevent reverse
flow from a sewer to low facilities when there
is a heavy drainage load for short periods that
can cause building up and over flow of wastes
Roof Drain
ndash Is a receptacle designed to collect
surface or rain water from an open
area and discharge to a catch basin
Floor Drain
ndash Is any pipe which carries water or
waterborne wastes in a building
drainage system
Sizing rain water piping
Local regulations on the disposal of rain or storm water are apt to vary Some places permit this water to run off into the septic tank or public or private sewer others insist that it be drained into a dry well Regardless of which rule prevails it is recommended that rain water be kept separate from sewage and that a separate pipe be used to connect the drained area with the disposal area If this is done the rain-water drainage piping can be a smaller more economical size and the danger of flooding the sewage system during a cloudburst or thunder shower is eliminated
Storm-water piping size is determined by the area drained in horizontal projection that is the flat area in square feet on which rain may fall Measurements of roof and other such areas may be estimated but in doubtful cases the larger of two possible pipe sizes should be used
Sizing house drain
The size of pipe to be used in a house drain is determined by the number of units drained by it Proper diameters are for 2 units 1 12 for 9 units 2 for 25 units 2 12
The size of any stack house drain or sewer must be however at least the size of the largest branch connected to it The minimum size of a house drain receiving the discharge from a water closet should be 4 in diameter and this pipe should continue full size to the vertical stacks receiving the discharge of water closets Even without any water closets discharging into a system the drainage system should have at least one 3 diameter stack extended full size through the roof
ndash Trap seal must have a min depth
of 2rdquo and max of 4rdquo depth
ndash Placed within 2rsquo of the fixture
accessible for cleaning through its
bottom with a plug
ndash Made of steel cast-iron copper
plastic and brass except those in
urinals and water closets which
are made of vitreous china cast
integrally with the fixture
Vents
ndash Vents are the extension of soil and
waste stacks through the roof and a
system of pipes largely paralleling the
drainage system for the admission of
air and discharging of gases
SPECIAL DEVICES IN
DRAINAGE SYSTEM
Interceptors
ndash device designed and installed so as
to separate and retain deleterious
hazardous or undesirable matter
from normal waste and permit normal
sewage or liquid waste to discharge
into the disposal terminal by gravity
Sump and Ejectors
ndash A sump is a tank or a pit which
receives sewage or liquid waste
located below the normal grade
of the gravity system and must be
emptied by a mechanical means
ndash Sewage ejectors may be motor-
driven centrifugal pumps or they may
be operated by compressed air
Ejector pump for submersible system
Ejector for Vertical lift submerge pump
Backwater valvescheck valve
ndash A backwater valve closes to prevent reverse
flow from a sewer to low facilities when there
is a heavy drainage load for short periods that
can cause building up and over flow of wastes
Roof Drain
ndash Is a receptacle designed to collect
surface or rain water from an open
area and discharge to a catch basin
Floor Drain
ndash Is any pipe which carries water or
waterborne wastes in a building
drainage system
Sizing rain water piping
Local regulations on the disposal of rain or storm water are apt to vary Some places permit this water to run off into the septic tank or public or private sewer others insist that it be drained into a dry well Regardless of which rule prevails it is recommended that rain water be kept separate from sewage and that a separate pipe be used to connect the drained area with the disposal area If this is done the rain-water drainage piping can be a smaller more economical size and the danger of flooding the sewage system during a cloudburst or thunder shower is eliminated
Storm-water piping size is determined by the area drained in horizontal projection that is the flat area in square feet on which rain may fall Measurements of roof and other such areas may be estimated but in doubtful cases the larger of two possible pipe sizes should be used
Sizing house drain
The size of pipe to be used in a house drain is determined by the number of units drained by it Proper diameters are for 2 units 1 12 for 9 units 2 for 25 units 2 12
The size of any stack house drain or sewer must be however at least the size of the largest branch connected to it The minimum size of a house drain receiving the discharge from a water closet should be 4 in diameter and this pipe should continue full size to the vertical stacks receiving the discharge of water closets Even without any water closets discharging into a system the drainage system should have at least one 3 diameter stack extended full size through the roof
Vents
ndash Vents are the extension of soil and
waste stacks through the roof and a
system of pipes largely paralleling the
drainage system for the admission of
air and discharging of gases
SPECIAL DEVICES IN
DRAINAGE SYSTEM
Interceptors
ndash device designed and installed so as
to separate and retain deleterious
hazardous or undesirable matter
from normal waste and permit normal
sewage or liquid waste to discharge
into the disposal terminal by gravity
Sump and Ejectors
ndash A sump is a tank or a pit which
receives sewage or liquid waste
located below the normal grade
of the gravity system and must be
emptied by a mechanical means
ndash Sewage ejectors may be motor-
driven centrifugal pumps or they may
be operated by compressed air
Ejector pump for submersible system
Ejector for Vertical lift submerge pump
Backwater valvescheck valve
ndash A backwater valve closes to prevent reverse
flow from a sewer to low facilities when there
is a heavy drainage load for short periods that
can cause building up and over flow of wastes
Roof Drain
ndash Is a receptacle designed to collect
surface or rain water from an open
area and discharge to a catch basin
Floor Drain
ndash Is any pipe which carries water or
waterborne wastes in a building
drainage system
Sizing rain water piping
Local regulations on the disposal of rain or storm water are apt to vary Some places permit this water to run off into the septic tank or public or private sewer others insist that it be drained into a dry well Regardless of which rule prevails it is recommended that rain water be kept separate from sewage and that a separate pipe be used to connect the drained area with the disposal area If this is done the rain-water drainage piping can be a smaller more economical size and the danger of flooding the sewage system during a cloudburst or thunder shower is eliminated
Storm-water piping size is determined by the area drained in horizontal projection that is the flat area in square feet on which rain may fall Measurements of roof and other such areas may be estimated but in doubtful cases the larger of two possible pipe sizes should be used
Sizing house drain
The size of pipe to be used in a house drain is determined by the number of units drained by it Proper diameters are for 2 units 1 12 for 9 units 2 for 25 units 2 12
The size of any stack house drain or sewer must be however at least the size of the largest branch connected to it The minimum size of a house drain receiving the discharge from a water closet should be 4 in diameter and this pipe should continue full size to the vertical stacks receiving the discharge of water closets Even without any water closets discharging into a system the drainage system should have at least one 3 diameter stack extended full size through the roof
SPECIAL DEVICES IN
DRAINAGE SYSTEM
Interceptors
ndash device designed and installed so as
to separate and retain deleterious
hazardous or undesirable matter
from normal waste and permit normal
sewage or liquid waste to discharge
into the disposal terminal by gravity
Sump and Ejectors
ndash A sump is a tank or a pit which
receives sewage or liquid waste
located below the normal grade
of the gravity system and must be
emptied by a mechanical means
ndash Sewage ejectors may be motor-
driven centrifugal pumps or they may
be operated by compressed air
Ejector pump for submersible system
Ejector for Vertical lift submerge pump
Backwater valvescheck valve
ndash A backwater valve closes to prevent reverse
flow from a sewer to low facilities when there
is a heavy drainage load for short periods that
can cause building up and over flow of wastes
Roof Drain
ndash Is a receptacle designed to collect
surface or rain water from an open
area and discharge to a catch basin
Floor Drain
ndash Is any pipe which carries water or
waterborne wastes in a building
drainage system
Sizing rain water piping
Local regulations on the disposal of rain or storm water are apt to vary Some places permit this water to run off into the septic tank or public or private sewer others insist that it be drained into a dry well Regardless of which rule prevails it is recommended that rain water be kept separate from sewage and that a separate pipe be used to connect the drained area with the disposal area If this is done the rain-water drainage piping can be a smaller more economical size and the danger of flooding the sewage system during a cloudburst or thunder shower is eliminated
Storm-water piping size is determined by the area drained in horizontal projection that is the flat area in square feet on which rain may fall Measurements of roof and other such areas may be estimated but in doubtful cases the larger of two possible pipe sizes should be used
Sizing house drain
The size of pipe to be used in a house drain is determined by the number of units drained by it Proper diameters are for 2 units 1 12 for 9 units 2 for 25 units 2 12
The size of any stack house drain or sewer must be however at least the size of the largest branch connected to it The minimum size of a house drain receiving the discharge from a water closet should be 4 in diameter and this pipe should continue full size to the vertical stacks receiving the discharge of water closets Even without any water closets discharging into a system the drainage system should have at least one 3 diameter stack extended full size through the roof
Interceptors
ndash device designed and installed so as
to separate and retain deleterious
hazardous or undesirable matter
from normal waste and permit normal
sewage or liquid waste to discharge
into the disposal terminal by gravity
Sump and Ejectors
ndash A sump is a tank or a pit which
receives sewage or liquid waste
located below the normal grade
of the gravity system and must be
emptied by a mechanical means
ndash Sewage ejectors may be motor-
driven centrifugal pumps or they may
be operated by compressed air
Ejector pump for submersible system
Ejector for Vertical lift submerge pump
Backwater valvescheck valve
ndash A backwater valve closes to prevent reverse
flow from a sewer to low facilities when there
is a heavy drainage load for short periods that
can cause building up and over flow of wastes
Roof Drain
ndash Is a receptacle designed to collect
surface or rain water from an open
area and discharge to a catch basin
Floor Drain
ndash Is any pipe which carries water or
waterborne wastes in a building
drainage system
Sizing rain water piping
Local regulations on the disposal of rain or storm water are apt to vary Some places permit this water to run off into the septic tank or public or private sewer others insist that it be drained into a dry well Regardless of which rule prevails it is recommended that rain water be kept separate from sewage and that a separate pipe be used to connect the drained area with the disposal area If this is done the rain-water drainage piping can be a smaller more economical size and the danger of flooding the sewage system during a cloudburst or thunder shower is eliminated
Storm-water piping size is determined by the area drained in horizontal projection that is the flat area in square feet on which rain may fall Measurements of roof and other such areas may be estimated but in doubtful cases the larger of two possible pipe sizes should be used
Sizing house drain
The size of pipe to be used in a house drain is determined by the number of units drained by it Proper diameters are for 2 units 1 12 for 9 units 2 for 25 units 2 12
The size of any stack house drain or sewer must be however at least the size of the largest branch connected to it The minimum size of a house drain receiving the discharge from a water closet should be 4 in diameter and this pipe should continue full size to the vertical stacks receiving the discharge of water closets Even without any water closets discharging into a system the drainage system should have at least one 3 diameter stack extended full size through the roof
Sump and Ejectors
ndash A sump is a tank or a pit which
receives sewage or liquid waste
located below the normal grade
of the gravity system and must be
emptied by a mechanical means
ndash Sewage ejectors may be motor-
driven centrifugal pumps or they may
be operated by compressed air
Ejector pump for submersible system
Ejector for Vertical lift submerge pump
Backwater valvescheck valve
ndash A backwater valve closes to prevent reverse
flow from a sewer to low facilities when there
is a heavy drainage load for short periods that
can cause building up and over flow of wastes
Roof Drain
ndash Is a receptacle designed to collect
surface or rain water from an open
area and discharge to a catch basin
Floor Drain
ndash Is any pipe which carries water or
waterborne wastes in a building
drainage system
Sizing rain water piping
Local regulations on the disposal of rain or storm water are apt to vary Some places permit this water to run off into the septic tank or public or private sewer others insist that it be drained into a dry well Regardless of which rule prevails it is recommended that rain water be kept separate from sewage and that a separate pipe be used to connect the drained area with the disposal area If this is done the rain-water drainage piping can be a smaller more economical size and the danger of flooding the sewage system during a cloudburst or thunder shower is eliminated
Storm-water piping size is determined by the area drained in horizontal projection that is the flat area in square feet on which rain may fall Measurements of roof and other such areas may be estimated but in doubtful cases the larger of two possible pipe sizes should be used
Sizing house drain
The size of pipe to be used in a house drain is determined by the number of units drained by it Proper diameters are for 2 units 1 12 for 9 units 2 for 25 units 2 12
The size of any stack house drain or sewer must be however at least the size of the largest branch connected to it The minimum size of a house drain receiving the discharge from a water closet should be 4 in diameter and this pipe should continue full size to the vertical stacks receiving the discharge of water closets Even without any water closets discharging into a system the drainage system should have at least one 3 diameter stack extended full size through the roof
Backwater valvescheck valve
ndash A backwater valve closes to prevent reverse
flow from a sewer to low facilities when there
is a heavy drainage load for short periods that
can cause building up and over flow of wastes
Roof Drain
ndash Is a receptacle designed to collect
surface or rain water from an open
area and discharge to a catch basin
Floor Drain
ndash Is any pipe which carries water or
waterborne wastes in a building
drainage system
Sizing rain water piping
Local regulations on the disposal of rain or storm water are apt to vary Some places permit this water to run off into the septic tank or public or private sewer others insist that it be drained into a dry well Regardless of which rule prevails it is recommended that rain water be kept separate from sewage and that a separate pipe be used to connect the drained area with the disposal area If this is done the rain-water drainage piping can be a smaller more economical size and the danger of flooding the sewage system during a cloudburst or thunder shower is eliminated
Storm-water piping size is determined by the area drained in horizontal projection that is the flat area in square feet on which rain may fall Measurements of roof and other such areas may be estimated but in doubtful cases the larger of two possible pipe sizes should be used
Sizing house drain
The size of pipe to be used in a house drain is determined by the number of units drained by it Proper diameters are for 2 units 1 12 for 9 units 2 for 25 units 2 12
The size of any stack house drain or sewer must be however at least the size of the largest branch connected to it The minimum size of a house drain receiving the discharge from a water closet should be 4 in diameter and this pipe should continue full size to the vertical stacks receiving the discharge of water closets Even without any water closets discharging into a system the drainage system should have at least one 3 diameter stack extended full size through the roof
Sizing rain water piping
Local regulations on the disposal of rain or storm water are apt to vary Some places permit this water to run off into the septic tank or public or private sewer others insist that it be drained into a dry well Regardless of which rule prevails it is recommended that rain water be kept separate from sewage and that a separate pipe be used to connect the drained area with the disposal area If this is done the rain-water drainage piping can be a smaller more economical size and the danger of flooding the sewage system during a cloudburst or thunder shower is eliminated
Storm-water piping size is determined by the area drained in horizontal projection that is the flat area in square feet on which rain may fall Measurements of roof and other such areas may be estimated but in doubtful cases the larger of two possible pipe sizes should be used
Sizing house drain
The size of pipe to be used in a house drain is determined by the number of units drained by it Proper diameters are for 2 units 1 12 for 9 units 2 for 25 units 2 12
The size of any stack house drain or sewer must be however at least the size of the largest branch connected to it The minimum size of a house drain receiving the discharge from a water closet should be 4 in diameter and this pipe should continue full size to the vertical stacks receiving the discharge of water closets Even without any water closets discharging into a system the drainage system should have at least one 3 diameter stack extended full size through the roof