BUILDING SERVICES DEPARTMENT250 Frank H. Ogawa Plaza, 2nd Floor, Oakland, CA 94612Inspection Services: 510.238.3443 FAX: 510.238.2263
Standard SpecificationsFor Private Sewer Laterals
APPROVED MATERIALS LIST
City of Oakland 2012
• Approvedmaterials
• Inspections
• Housesewer4”-6”
• Couplings
• BeddingandBackfill
• GuidelinesforCSLMforVCpipe
• ASTMC12InstallingVC
• ASTMD2321Installationofundergroundthermoplasticpipe
• MainSewerTaps
• Standardcoverforupperandlowerlaterals
• GeoTexti1eFabric
• ReinforcedConcreteutilityboxes
• ConcreteCuringCompounds
• Readymixdesignsj
• MainsewerTaps
• WaterandSewerSeparation
• SewerOverflowDevicesandBackwatervavles
• Cleanouts
• LegislationforprotectedtreesandOverflowpreventiondevices
Table of ConTenTs
1). APPROVED Extra strength Vitrified Clay
Standards ASTM-C700 with ASTM-C425 Bell and spigot polyurethane jointsPlain end ASTM-C700 with 4 band shear ring coupling (type Z) approved on private propertyLocal Manufacturer-Mission Clay
2) APPROVED Cast Iron Soil Pipe
Standards -ASTM A 74 for Hub and Spigot Cast Iron Soil pipe and ASTM A746 for fittings. NSF marking en-sures compliance with t relevant standards.No-Hub ~ ASTM 888 CISPI 301. NSF marking ensures compliance with relevant standards. 4 band shear cou-pling for underground installations. Above ground may be 2 banded shear coupling (CISPI 310 and NSF)MANUFACTURES- AB&I, Charlotte foundry, Tyler PipeCouplings - Anaco and Ideal
3) APPROVED PVC
SDR 26 IPS ASTM D3034 ASTM F477 bell and spigot jointsSchedule 40 ASTM Dl785 & ASTM D2655 (NO cellular core pipe is permitted) Solvent welded on private property only. Not permitted in public right of way or sewer easement.
4) APPROVED HDPE
SDR 17 DIPS with fused joints ASTM D3035 F714HDPE SHALL ONLY BE USED WHEN PIPE BURSTING AND TRENCHLESS SEWERS
5) APPROVED DUCTILE IRON PIPE
Class 52 thickness class-350 psi pressure class Cement or Ceramic epoxy lined (US PIPE PROTECTO 401) AWWA C 151 and AWWA C200Joints shall conform to AWWA C 111 for push on and Mechanical joints and AWWA C110 for flanged jointsLocal Manufacture-US Pipe and Foundry
6) APRROVED ABS PIPE
Schedule 40 ABS shall meet ASTM D2661 standards for solid core pipe and fittings.Solvent cement shall meet ASTM 2235. (NO cellular core pipe is permitted) Solventwelded on private property only. Not permitted on sewer in public right of way.
The use of cellular core ABS or PVC pipe shall be rejected.
Inspections: All piping shall be bedded and haunched to the spring line of the pipe for inspection. All
markings and ASTM makings shall be visible on top of pipe to verify correct standards.
HOUSE SEWERS 4”-6” Material Types: pipe
1) Cast Iron Service weight Bell and Spigot or No Hub CI installed with 4 band shear couplings below ground. Above ground installation of NO HUB CI may be made with approved 2 band shear couplings. All CI shall be Poly encased in Public Right of Way or sewer easement.
2) PVC SDR 26 IPS bell and spigot solid wall and Schedule 40 PVC, solvent weld (on private property only). The use of ABS to PVC transition GLUE prohibited. Use approved 4 band shear coupling .
3) VCP Extra Heavy with Bell and Spigot or plain end with shear ring couplings.
4) DIP class 52 thickness, 350 psi class. Bell and Spigot, mechanical or flanged joints. Poly encased in Public Right of way or sewer easement.
5) HDPE SDR 17 DIPS with fused joints (allowed for trench-less only).
6) ABS Schedule 40 ABS, solvent weld (on private property only). The use of ABS to PVC transition GLUE is Prohibited. Use approved 4 band shear coupling.
ALL piping shall be installed without stress and to approved standards.
COUPLINGS
All underground transitions to dissimilar materials shall be made with 4 band u shear couplings. Above ground transitions may be made with approved 2 band shear couplings.
APPrOved COUPLINGS fOr TrANSITIONS TO dISSImILAr mATerIALS & UNderGrOUNd NO HUB INSTALLATIONS:
Husky 4 clamp shielded coupling (80 in-lb)Anaco No-Hub 4 clamp shielded coupling (60 in-lb)fernco No-Hub 4 clamp shielded coupling, Silver (60 in-lb), Yellow and Green (80 inlb)fernco 4 clamp shielded coupling Strong back RC Couplings, (60 in-lb)fernco 50004 clamp shielded coupling Series RC Coupling, (60 in-lb)mission adjustable 4 clamp shielded repair coupling coupling.
APPrOved ABOve GrOUNd (60 in-lb) NO-HUB TO NO-HUB COUPLINGS:
Ideal 2 banded shielded coupling, CISPI 310 and NSFAnaco 2 banded shielded coupling, CISPI 310 and NSF (shown below)
6
7
CouplingsMaterial Type(s): Banded Rubber Couplings
Description: For repairs, alterations and house sewers with connections of dissimilar materials. Banded rubber couplings shall have four (4) clamps and metal shear bands.
Manufacturer: Manufacturers included but are not limited to:
1. Fernco® 2. Mission® 3. Husky®4. Anaco®
Note: Check with Inspector prior to purchase of material to insure proper coupling is selected for the different pipe types encountered.
Mission® Band Seal Joints® Calder Coupling
Fernco® Proflex Coupling Anaco 2-Banded
(60 in-lb)
8
Husky® 4 Clamp Coupling Fernco® Stainless Steel Shear Rings
Fernco® Strong Back RC Couplings Fernco® 5000 Series RC Couplings
Fernco® No-Hub Couplings Mission® Adjustable Repair Coupling Silver (60 in-lb)
Yellow & Green (80 in-lb)
Anaco No Hub (60 in-lb)
(60 in-lb) (80 in-lb)
Standard cover requirements for upper and lower laterals
Upper laterals are collection to the building drain at the structure and do not cross intothe Public right of way or sewer easements’. The lower lateral is the portion of the sewerthat is installed in the Public right of way. Only contractors with a C 42 sewer license orA contractor is permitted to work in the right of way.
Pipe cover limitation tablesFirst table is for upper laterals on private property without loading. Plain end VCis approved with shear ring couplings on upper laterals. For upper laterals underdriveway, use Lower lateral table
* ALL DIP AND CI SHALL BE POLY ENCASED IN PUBLIC EASEMENTStandard enclosed
All NO HUB Underground Couplings shall be Heavy Duty shear with 4 bands.
UPPER LATERAL TABLE
Size MaterialMin.
depthMax. depth
4”– 6” ABS Schedule 40 Solid Core 2.5 244”– 6” VC C700 Sewer pipe 2.5 304”– 6” CI SVandNohub 1.5 304”– 6” DI Class 52 1 304”– 6” PVC SDR26 IPS 2.5 244”– 6” HPDE SDR 17 DIPS 2.5 244”– 6” PVC Schedule 40 Solid Core 2.5 24
LOWER LATERAL TABLE
Size MaterialMin.
depthMax. depth
4”– 6” VC C700 Bell and spigot only 5 304”– 6” CI* Service weight and No Hub 4 304”– 6” DI* Class 52 1 304”– 6” PVC SDR26 IPS 5 244”– 6” HDPE SDR 17 DIPS 5 24
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Reinforced Concrete Utility Boxes Material Type(s): Utility boxes for traffic and non-traffic areas ITEM DESCRIPTION PRODUCT
12" x 12" Drain Box Christy® V12 Box 10-3/8" I.D. x 12" Valve Box Christy® or Jensen® G5 Traffic ValveTraffic Area Cast Iron Grate (3/8" Max Spacing) H/20 Loading
Christy® V12-71W Welded Grate
8" I.D. x 12" Valve Box Christy® or Jensen® F8 Box 8-1/2" I.D. x 11-3/4" Drain Box Christy® V1 Drain Box 10-5/8" I.D. x 17-1/4" Drain Box Christy® V9 Drain Box
Non-Traffic Area
Cast Iron Grate 3/4" Max SpacingChristy® V1-71C Grate and V9-71C Grate
Christy® V12 Box Christy® G5 Box Christy® F8 Box Christy® V12-71W Christy® K-6004 Grate Christy® V1-71C Welded Grate (Special Order) Grate
TAPS
Material types: Taps
The portion of the lower lateral in the right-of-way or public easement shall be installed at a 90-degree angle to the sewer main with a wye-connection oriented in the direction of flow in the main. The wye-connection shall be installed a minimum of 3 feet from a manhole, and 5 feet from a lamp-hole (sewer main clean-out).
The minimum horizontal distances between adjacent sewer lateral connections shall be: a) Laterals on the same side of the street/sewer 10(ten) feet b) Laterals on the opposiste side of the street/sewer 5 (five) feet
Tap maTerials for The corresponding main sewerACP Fowler saddle
RCP Insert a wye
CIP, DIP Fowler saddle Sealtite type “S” saddle with 4 band coupling
HDPE Insert a wye
VCP Insert a wye
All other taps shall be performed by Tap-tite or Roto rooter.Where possible, taps shall be installed above the springline of pipe at an angle not to exceed 45 degrees from the horizontal.
Effort shall be made to install tap fitting and saddles with a 45 degree (wye) configuration to facilitate continuous flow velocities into the main. Straight taps can cause hydraulic jump which can cause solids to drop off and accumulate in the main.
TRANSVERSE SECTION
SADDLE CONNECTION DETAIL CONNECTION AT MAIN
45˚min.
Coupling
Saddle
1/8 bend
Sewer main
45˚max.
Min. slope 2% without
special approval
Radial connection
Lower lateral
8 in. main
Notes:1. When a lateral sewer is installed in advance of the building sewer, it shall be terminated with a cap or
plug 5’ past the property line, easement line or last improvement and the Contractor shall mark the location of the capped/plugged end with a 2x4 pressure treated stake painted green.
2. Refer to section 15.02205 for bedding and backfill requirements.3. See note 2 on DWG-25 for cover requirements
Criteria For The Separation Of Water Main & Gravity Sanitary SewersDOHS Memo # 2003-201
Parallel Construction
6 ft.
1
2
Special pipe
Special pipe
No joints
Special permission
5 ft.6 in.
Grade Grade
6 in.5 ft.4 ft.4 ft.
1 ft.
Water Main
3 ft. 1 ft.
B P
P
P
C
D
A
Crossing
Plan View
SiDe View
ZOne “a”: Sewer lines not permitted without approval of AHJ (Authority Having Jurisdiction)
ZOne “B”: Permitted Materials: • VC pipe with compression joints • PVC pipe with rubber ring joints (ASTM 3034) • C1 or 01 pipe with compo joints • Rc pressure pipe with compo joints • HDPE pipe with fusion welded Joints (AWWA C906-99) • Spirally-reinforced HDPE pipe with gasketed joints
(ASTM F-984)
ZOne “C”: Permitted Materials: • DI Pipe with hot dip bituminous coating • C-900 PVC (DR 14). Continuous section centered over pipe being crossed • RC pressure pipe. Continuous section centered over
pipe being crossed • Any sewer pipe within a continuous sleeve • HDPE pipe with fusion welded joints (AWWA C906-99)
ZOne “D”: Permitted Materials: • DI pipe with hot dip bituminous coating & mechanical joints • HDPE pipe with fusion-welded joints (AWWA C906-99) • C-900 PVC (DR 14) continuous section centered over pipe being crossed • RC pressure pipe continuous section centered over pipe being crossed • Any sewer pipe within a continuous sleeve
ZOne “P”: nOT PeRMiTTeD
EBMUD Private Sewer Lateral Ordinance
How to Prevent Backup from City Main & Protect Your Home
Backwater Device
Drainage piping serving fixtures on a floor, where the floor level is located BELOW the elevation of the next upstream manhole cover of the public/private sewer system, shall be protected from the backflow of sewage by installing anapproved Backwater Valve. Section 710.1 UPC
☑ NOTE: Fixtures located on a floor, where the floor level is located ABOVE the next uphill manhole cover elevation shall not discharge through a Backwater Valve.
Public sewerBuilding sewer
To public sewer
Second floor drain bypassesbackwater valve
Manhole cover
Box & cover containing backwater valve
2nd floor ABOVE manhole
1st floor BELOW manhole
To building
Backwater device
Cleanout
Finish grade
No water in building sewer,flap opens by gravity, rests against ledge
Discharge from building into building sewer, flaw swings upward, letting discharge flow through
Sewage backflow into building sewer, is stopped by flap directing sewage flow into device, building is protected
Illustrations ©2012 Code CheckBUILDING SERVICES DEPARTMENT250 Frank H. Ogawa Plaza, 2nd Floor, Oakland, CA 94612Inspection Services: 510.238.3443 FAX: 510.238.2263
Illustrations ©2012 Code Check
Finish grade
Finish grade
3 in. min.
2 ft. max. to bldg.
2 ft. max. to bldg.
6 in. min.
6 in. min.
6 in. min.
4 in.min.
4 in.min.
3 in.min.
6 in. min. (typical)
Remove standard cleanout plug
Standard cleanout 4 in. min.
Backwater valve
Flap prevents water entry
Backwater valve
Sewer overflow device
Cast in place concrete
Standard cleanout 4 in. min.
Sewer overflow device
Lowest floor in structure
Lowest floor in structure
Pop-up ball to elimate emission of odors & access of rodentssee lower left drawing
BUILDING SERVICES DEPARTMENT250 Frank H. Ogawa Plaza, 2nd Floor, Oakland, CA 94612Inspection Services: 510.238.3443 FAX: 510.238.2263
Things to Consider when Replacing Sewer Laterals in
Multistory Dwellings
When owners of a multistory dwelling are required to replace their private sewer lateral, it may be determined that the lowest floor is below the upstream manhole cover. This condition can cause flooding of the building if the sewer main has a blockage.
Current code requires that only fixtures below the manhole cover drain through the backwater valve. This prevents occupants on upper floors from flooding the lower floor accidently. Since this would require an expensive re-plumbing of existing buildings, the city will require the use of a sewer overflow device in addition to a backwater valve to prevent both a backup from the main City sewer and the accidental flooding of the lower floor by owners unaware that there is a blockage in the sewer. It will also protect the building in case of blockages in their own private sewer lateral
A sewer overflow device per the approved materials list is required on ALL side sewer connections and repairs and/or alternations on existing side sewers.
The specific location of the sewer overflow device shall be determined by the contractor and the property owner such that the top location of the overflow device is a minimum of 6 inches below the lowest finished floor elevation of the connected building.
3
3
1
2
2
1
1
2
3
Ball seated
Water pressure raises ball, water escapes through bell
EBMUD Private Sewer Lateral Ordinance
How to Prevent Backup from City Main & Protect Your Home
11
Overflow Protection Devices Material Type(s): Overflow Protection Devices (OPD) Description: Overflow protection devices prevent sewage from entering homes
and businesses and reroute the spill outside the building. Manufacturer:
ABS PVC
MANUFACTURER PRODUCT NAME
Mainline Backflow Products Adapt-a-valve Inspection Chamber with Test-Eze Gate Feature Extendable
Backwater Valve Rector Seal Clean Check Backwater Valve
"Mushroom" Genplex Kelly Backwater Device (No-Hub & IPS)
Sewer Popper™ Stephens Corp Sewer Popper™ Model S62-304
Relief Cap Unlimited Home Solutions LLC (www.unlimitedhomesolutions.com) Sewer Relief Cap
Extendable Backwater Valves
“Mushroom” OPD
Sewer Popper™ OPD Sewer Relief Cap