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SMC WATER TANK CONSTRUCTION MANUAL

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Table of Contents

1. Outline of Water Tank Construction

2. Safety Rules for the Assembler

3. Responsibility and Duty of Supervisor

4. Construction Preparation and Pre-checks

5. Acceptance, Handling and Storage of Materials

6. Tool List for Water Tank Construction

7. What to know before Assembling & Constructing Water Tank

8. Assembly Process for Water Tank

1) Verify Foundation

2) Base Frame Assembly and Anchor Bracket Locking

3) Horizontal Check and Adjustment

4) Sealing Tape (Waterproof Tape) Adhesion

5) Bottom Panel Assembly

6) Side Panel Temporary Assembly

7) Processing Assembly Hole of Each Panel

8) Temporary Assembly of Interior (Exterior) Stiffening Element

9) Ceiling Panel Assembly

10) Assembly of Side Panel

11) Complete Assembly of All Bolts

12) Assembly of Items to be Mounted Inside/Outside of TANK (including fittings)

13) Anchor Bolt Working

14) Cleaning Inside/Outside of TANK

15) Watertight Test

16) Completion of Installation

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1. Outline of Water Tank Construction

Water and air are indispensable to human life. This manual details the process of assembling a tank

that stores this valuable resource. The most important issue in assembling or installing a water

tank is the prevention of water leakage in the completed tank. Precisely following the directions in

this manual at the time of assembly and construction of the tank will ensure a leak-proof tank.

Please observe the following during the tank assembly process.

1) As the tank stores drinking water, ensure a clean workspace and assembly process.

2) This water tank is very durable under normal conditions; be familiar with this manual to ensure a

perfect assembly process.

3) Handle the various parts carefully so as not to damage the surface.

4) Assemblers must observe safety rules at all times during the assembly process.

2. Safety Rules for the Assembler

While working with and installing the SMC Water Tank of Doha Industry Co., Ltd., the following

regulations must be observed to ensure the safety and sanitation. The assembler must follow these

regulations and the owner of the construction is responsible for them.

1) All workers must absolutely wear safety shoes and hard hats during the process.

2) All workers must wear shirts that button at the sleeves and clean working clothes.

3) When climbing on the inside or on the ceiling panel, wear non-slip, clean sports shoes (without

dust or other foreign substances).

4) In order to prevent safety accidents, parts weighing 25Kg or more must be team lifted.

5) When a task is being performed by two workers or more, a signal must be used.

6) When a task is being performed in a high area, use scaffolding with safety equipment to prevent

people or items from slipping or falling.

7) Check the safety condition of the work place and bottom of slab, and remove any potential hazards

in advance.

8) When using a rope to hoist panels or parts of the tank to a high area, the higher worker must

wear a safety belt, and the worker below must stand clear.

9) When working on the ceiling of the tank, use extreme caution to not slip or fall.

10) Do not come in contact with the cable or iron bar at the construction site (danger of electric

shock); removal must be done by the site engineer of the construction owner.

11) When using electric tools, do a prior check for electrical leaks such as power, outlet, plug,

transformer, etc.

12) Working on a wet surface or on a rainy day creates a dangerous condition for risk of electric

shock. Do not work under these conditions.

13) To protect eyes from the strong sunlight during outdoor work, wear light-colored sunglasses.

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14) Do not smoke inside the tank. Smoking must be done in a designated area.

15) Inflammables must not be stored inside the tank, but in an isolated warehouse, and checked

regularly.

16) When working on the rooftop of a high building, keep in mind that wind speed is faster than on

the ground surface, and be extremely careful that panels do not fly off, causing damage to materials

or people.

17) When partial lighting is needed in the work place, use a flashlight or a working lamp; do not

use inflammables that use a flame as a light source.

18) Lodging is not permitted in the materials warehouse. If the site requires guarding, after

getting approval from the site manager, an independent, temporary building separately located from

the materials warehouse should be built for lodging.

※Note: While handling the panels such as bringing in, carrying, and assembling, if the surface is

scratched or the corners are cut, it may cause water leakage. Handle the panels with the utmost care,

and become familiar with the causes of leakage, in order to thoroughly observe any leaks during

construction.

3. Responsibility and Duty of Supervisor

1. The supervisor must verify that construction is being done in accordance with this manual.

2. The supervisor is responsible for periodically checking the safety of construction, and have

workers repeat “the Outline of Water Tank Construction” and “the Safety Rules” prior to work

every day.

3. The construction of a water tank differs from other construction methods; once assembly has been

done in accordance with the order, partial assembly becomes impossible. The supervisor must verify

that construction is being done correctly at every stage of assembly.

4. If a defect is found in any part during construction, stop work and report to the technical

department of the factory to receive direction. The supervisor is responsible for supervising

whether other defect-free parts are being used. Do not conduct arbitrarily without permission.

5. Once construction is completed, fill the tank with water. The owner, constructor and supervisor

must conduct jointly a test for leakage, receive confirmation and report to the related department.

4. Construction Preparation and Pre-check Issues

Before using the water tank, in order to enhance effectiveness of assembly on site and the quality

of the tank, it is essential to establish an efficient and economical assembly schedule by a pre-

survey of installing position.

Although sites will vary, the following must be checked.

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(1) Check and plan for which route and gate the SMC PANEL and various other materials will be

carried through and what kind of equipment will be used to convey them to the installation site.

(2) If the tank will be installed on the rooftop of a building or an elevated site, plan the safety

of the equipment with all workers being aware of the direction and speed of wind.

(3) Create a power supply plan by receiving approval for the power source.

(4) Check the foundation and the work space.

5. Acceptance, Handling and Storage of Material

5-1 Acceptance of Material (SMC PANEL and Subsidiary Material)

Once the water tank materials arrive at the construction site or the agency, the person responsible

must receive the packing list or invoice and immediately verify all materials have been received.

If there is any discrepancy between the packing list and the materials received, file a report with

the forwarding department of the factory within 24 hours.

5-2 Handling and Storage of Material

(1) When unloading heavy materials, use a forklift and handle carefully to avoid impact or damage.

Be particularly careful that the corners of panels are not damaged. (Damaged corners are a potential

leak site).

(2) When loading SMC panels, load the panels of the same type straightly to avoid deformity or

damage.

(3) Materials must be stored in a separate warehouse to avoid the risk of theft; the sealing tape in

particular must be stored in a dry place.

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6. Tool List for Water Tank Construction

TOOLS NEEDED

Name of Tool Spec. Standard Quantity

ELECTRIC IMPACT (1/2") 1/2" 2

IMPACT SOCKET (1/2") 14, 17, 19, 22,24 mm Each 2

EXTENSION BAR (1/2") Long, Short 1

IMPACT UNIVERSAL JOINT (1/2") 10

LONG IMPACT

SOCKET(1/2") 22, 24

Manufacturing is

needed (mm) Each 2

RATCHET WRENCH 14, 17, 24

mm Each 3

19, 22 Each 4

SPANNER 14, 17, 24

mm Each 1

19, 22 Each 3

MONKEY SPANNER 300 mm 1

ELECTRIC DRILL 2

DRILL CHUCK 2

ELECTRIC REEL 50M M 2

MULTICODE 50M M 2

MEASURING TAPES 5M M 2

LASER LEVEL 1

CUTTER 2

CIRCLE CUTTER 1

WORK LIGHT 2

BAR BINDING HANDLE 4

CLAW 1

GRINDER 1

CUTTING WHEEL 4"(100×2t×15.8) (Outer dia×Thickness

×Inner dia. mm) 1 box

CARBIDE MILLS 11.5, 12, 14 Φ Each 1

SDS PLUS (BIT-BOSCH) 18×200 (Out dia.×Length,

mm) 1

HAMMAR Large, Small Each 1

VICE GRIP PLIER 1

SPECIAL STEP LADDER

(5M) 1

HOLE CUTTER 1

OIL JACK 4×150mm×340mm Ton(load)×maximum×

minimum High 1

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7. What to know before Starting Construction

1. The surface at which each panel comes into contact with the other and the surface at which the

corner frame is assembled must be attached length-wise with sealing tape.

2. Surfaces on which the sealing tape is to be applied must be thoroughly cleaned without any

foreign matter or debris.

(Do not use a cloth that has been saturated with

either oil or water)

3. Joins and ends of sealing tape must overlap by at

least 50mm.

4. The protective paper on the sealing tape must be

removed prior to assembling the flange section

of the panel.

5. When fastening bolts, use a washer. Do not fasten with only a nut.

6. When fastening bolts, fix the head and fasten the nut.

7. If the bolt holes in various panels and parts do not connect properly, do not force. Forcing may

cause water leakage.

8. Do not strike the panels with a metal tool.

9. The inner surfaces of the crossing panels

must not be assembled unevenly.

10. Bolt fastenings bolt must be, in general,

turn 3~5 times alternately following the order

of the figure shown. The order of assembly must

start with the first bolt. (Fastening bolts all

at once may cause cracking, one cause of water

leakage.)

11. All holes for assembling the piping material

and parts must be made prior to assembling the

panel.

12. As the panel grade differs according to

height, verify the grade indicated at the panel

flange section, and apply following the

Attachment 1, 2. If it is applied incorrectly, the

tank may break due to water pressure.

<측면판넬: side panel>

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8. Assembling Process of Water Tank

1. Confirmation of Foundation

↓

2. Assembly of Base Frame (Anchor bracket

locking)

↓

3. Horizontal Checking and Adjustment

↓

4. Sealing Tape Attachment

↓

5. Bottom panel assembly

↓

6. Side panel shop assembly

↓

7.Assembly process for each panel

↓

8.Shop assembly of interior (exterior)

stiffening element

↓

9. Ceiling panel assembly

↓

10. Assembly of non-assembled side panel

↓

11. Complete assembly of all bolts

↓

12. Assembly of inside, outside mounted

elements (including fittings)

↓

13. Anchor bolt affixed

14. Cleaning of inside, outside tank

↓

15. Check assembly completion

↓

16. Watertight inspection

↓

17. Completion of Tank installation

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1. Confirm Foundation

1. An adequate foundation is the responsibility of the building owner.

2. Once the capacity of the water tank is decided, provide the owner with the specifications

(drawing) for a concrete foundation corresponding to the tank capacity (tonnage). The owner is

responsible for constructing a foundation in accordance with the specifications (considering the

ground strength of the installation site) as drawn up by an architectural design office.

3. Prior to installing the t, confirm the foundation construction and establish an installation plan.

4. Anchor Bolts must be thoroughly fixed by the constructor.

5. The maximum gap of the foundation construction must be within 1m; The base frame (Channel) joint

section must be safely set on the base pad.

Base Frame ℓW

H

W = 400

l = Within 1000mm

H = A min. space of 600mm is needed (including base frame)

※ Upper surface of base pad must ensure a smoothness of 1/500mm or less.

6. In order to ensure adequate work space during tank installation and for maintenance after

installation, at least 600mm is needed as in Fig, 1-b. The width of the base pad must be 300mm or

wider.

The upper surface of base pad must be kept horizontal.

Min. height

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Foundation frame and anchor bracket assembly

2-1. The specification of foundation frame according to the height of water tank

1. The following table describes the specification of foundation frame that varies depending on the

capacity and height of the tank.

Tank Height Shape and Size (Main Frame)

Less Than 2.5m

Angle 75×75×6t

Between 3m ~ 4m

Channel 125×65×6t

Between 4.5m ～ 5m

Channel 150×75×6.5t

2-2. Required Parts

1. (Channel 150mm, 125mm, Angle 75mm) ;

The required length and number depends on

the tank capacity.

For Channel use

For Angle use

Fig 2-a

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2. Foundation Bracket: Its height, number of holes, and required

amounts are different according to the tank size.

3. Its size remains constant, while the number of

anchor bracket depends on the tank size.

4. Bolts and nuts: Their size, M14, are all the same but, required number relies on the

tank size.

A부 상세

Reference Diagram

L2

L1

Fig 2-b

Fig 2-c

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1-3. Assembly Process

1. Arrange the parts of foundation frame in order.

(The bolt hole located on the inner side of panel should be on

the top, as shown in the reference diagram.)

2. Other attached parts, bolts and nuts, also, should be in order.

3. Roughly assemble them with hands, without using tools.

(The length of diagonal line L1 should be equal with that of L2.)

4. Assemble the bolt while checking the length of diagonal line

(L1=L2) with a tape measure. The bolt used for the assembly of outer

outer frame needs to remain as roughly assembled

5. After putting together the bolts, adjust the frame to the horizon

referring to the following adjustment method.

6. Attach the anchor bracket corresponding to the location of anchor

bolt (Detail D).

7. Keep the foundation frame assembly as level as possible (the level difference should be less

than 2mm.)

2. Horizontal Check-up and Adjustment

A

B

C

D

E F

G

H

I

K

L

M

N

Fig 2-d

Fig 3-a

2mm or less

Fig 2-e

Steel plate

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Laser level equalizer is one of the most convenient and accurate tools, but if you have no such

equipment, use a transparent hose as follows (the optimal diameter of the hose is about 10mm).

1) The setting of the reference point: Set two parallel corners first, like A and B or A and C.

Carefully consider that the reference point should be higher than any other connected point.

2) Based on this basic point, adjust the level of two other corners.

3) After leveling the outer frame, adjust the level of point G and H.

- All outer connected points are leveled first, and then the level of inner frame can be adjusted.

4) After tying a thread at point K and L, parallel the frame with the thread by putting the pre-described

steel plate under the bottom of the frame.

5) Other frames (including frame M-N, E-I-F) can be leveled by following the measure described in

number 4.

6) If you complete the leveling process to the final frame, check all the level again.

★ This process should be carried out very carefully, because it determines the life

span and construction quality of the whole tank.

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Water tank panel flange

W/T panel side

*How to attach:

After treating the joining

surface, overlap ends by at

least 50mm.

4. Sealing Tape Adhesion

4-1. Precautions for Adhering Sealing Tape

1. Clean the panel to be adhered; pay close attention to cleaning the surface to be adhered.

2. Do not use oily or waxed cloth.

3. Make sure the surface is completely dry before adhering.

4. Clean the Bolt Hole and ensure it is free of any dirt or debris.

5. Remove the protective paper from the Sealing Tape just prior to assembling.

4-2. How to adhere the Sealing Tape

1. Adhere the Sealing Tape to the entire surface area to be assembled.

2. The position on which the Sealing Tape is to be adhered is as the following figure.

3. The end section to which the Sealing Tape was adhered must overlap by 50mm.(see figure)

4. Connecting sections of the Sealing Tape must overlap by 50mm.

4-3. Sections on which Sealing Tape is used

1. Bolt-assembly surface of various SMC Panels

(Panel-assembly surfaces as in Fig. 4-a~d)

2. Surfaces joining the SMC Panel of a Corner Frame

(See Fig. 4-e)

3. Regarding the section that joins the corner frame, first adhere tape by completely wrapping each

frame up to the surface having a joining hole

Second, complete the join of the two frames to be joined with a bolt.

(At this time, ensure there is no difference of surfaces between the two frames)

Fig 4-a Fig 4-b Fig 4-c

Fig 4-d

Panel Flange Panel Side

Sealing Tape

Panel

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4. Inside Bracket

* How to adhere: Like Fig. 4-f, adhere double the Sealing Tape to the

Bracket.

4-4. Sealing Tape Applying Standard

5. Bottom Panel Assembly

5-1. Panel Assembly

1. Assemble the panel upside down on the base frame (See Fig. 5-a)

2. Assemble each panel using bolts (M12×45ℓ)(See Fig. 5-b)

Position Standard

(1) Side panel, Bottom panel, Ceiling panel 50mm

(2) Corner Frame 120mm

(3) Inside Bracket 160mm

3rd Phase: 150mm

Wrap completely up to the joining surface

1st Phase: 500~2000mm

Wrap completely up to the joining surface

2nd Phase: Fastening the joining

bolt

Fig 4-e

1st Phase: 500~2000mm

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3. Divide and assemble the large tank as in A, B, and C of Fig. 5-d, and put on the base frame.

Assemble the border surface of A, B, and C under the bottom pane.

The assembly and upside-down placement of too many panels at once will create a hazard and the

assembled panels will also be unsafe. The number of panels must be 4 or less per worker after

considering the number of workers.

.

5-2. Precautions for Assembling the Bottom Panels

1. The crossing section of a panel must be a plane surface without any differences at the 4 ends of

the Panel Flange (Fig. 5-f); the order of bolt fastening must be Fig. 5-e.

2. Bolts must not be fastened completely at once but rather slowly in two stages, and the order of

fastening is as Fig. 5-e.

3. Fastening bolt all at once can cause cracking, which in turn may cause leaks when the tank is

filled fully with water.

4. An overlapping of Sealing Tape must be positioned at the cross section.

5. If the bolt hole is not fitted properly, adjust with a ratchet as in Fig. 5-g, and fasten as in

Fig. 5-f. (Plane of Flange must be adjusted with a ratchet.)

6. Check the position on which the drain panel will be assembled among the bottom panels in

advance; be aware that the assembly must be done in the correct position.

6. Side Panel Temporary Assembly

6-1.Assembly of Side Panel

1. Remove the protective paper from the Sealing Tape.

2. Check the position of the bolt holes on the side panel and the grade (thickness) of panels of

each position, and assemble the panels.

4. Assemble each panel and the flange-stiffening bar simultaneously.

5. Do not fasten the bolts completely, but fasten the nuts as weakly as just no moving.

6. Do not assemble the side panels completely, but assemble them in a‘ㄷ’ shape as in Fig. 6-c and

insert the inner STAY and Bracket (STS), finally assembling the remaining wall panels.

7. Check the position of the fitting to be mounted to the side down panel, and assemble the panel

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for fitting (0.5*1.0) in the right position.

(2.5Mh-5Mh)

8. When bolting the side panel, disregard any differences at the end of the flange, but bolt the

plane surface of the inside so as to be horizontal. (Fig. 6-a)

(May cause leaks)

7. Processing the Assembly Hole of Each Panel

7-1. Need for Hole Processing

1) Hole processing for assembling a cross-stiffening panel when assembling the side panel (See the

figure)

2) Hole processing for assembling various fittings

Keep the

Same level

Wall panel

Fig 6-a

Fig 6-b

Part of

Fig 7-a

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7-2. How to process a hole

1) Draw a center “+”line at the bracket using a tool.

2) Mark the position of the hole by coinciding the cross lines of the side panels with a tool (WBR-

1717S).

3) Make a hole using a 15 drill Φ (M14).

4) As the position and gap of the cross hole determines the straightness of the rubber cap bolt to be

assembled here, a great amount of care must be taken to ensure proper assembly. (If the position and

gap of the cross hole does not fit, it may cause water leaks at the rubber cap bolt.)

8. Temporary Assembly of Interior (Exterior) Stiffening Element

8-1. Interior Stiffening Member

1. Kinds of Parts Used.

Name of Part Quality of Material Standard of Material

Inside STAY SUS Round Bar M12

Inside Bracket SUS 160 ×160 ×5t etc.

Ceiling Support FRP □-50 x 50 x 5t

2. How to compose the interior Stay

The interior stay must be installed exactly according to the construction drawing, and both ends of

the side panel must be supported to remain horizontal without sagging. See Fig. 8-a

8-2. Exterior Stiffening Element

1. Kinds of Parts Used

Name of Part Position of Use Material Standard of Material

Outside Stiffening FRAME Side panel flange part

HDG

ㄴ-115*30*3t*2pc

Flange Bar Side (bottom) panel joining

part ㄴ- 65*30*3t 외

Cross Stiffening Plate Side panel crossing part 160*160*4.5t

Corner Frame Side panel corner part HDG : 70*70*3

Ceiling Stay Side panel upper part (joint) Φ22.2 ×1.5t

Note) HDG: (Hot Dipped Galvanized Steel)

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2. How to compose the stiffening element (Interior, Exterior)

STS304 round bar

+ P.E. coated

9. Ceiling Panel Assembly

9-1. Assembly of Panel

1. The assembly of the ceiling panel must follow the same method of the bottom panel as in Item 5.

(See Fig. 9-a)

2. Use an M10 bolt for each panel.

STS INSIDE BRAKET (5T)

STS 304 Tie Rod

P.E Covered

M10

M10

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9-2. Precautions in assembling the ceiling panel

1. General precautions for assembly are same as for the bottom pane.

2. When assembling the panels upside down, be careful that the surface is not damaged; when

installing on-site, make sure the panel will not be caught by the wind.

3. Assemble the ventilator prior to assembling the panel.

4. Regularly install one ventilator for every 30 panels dividing the ceiling panel into the same

area to facilitate air ventilation inside tank.

(Disproportionate installation will cause inadequate ventilation.)

5. The position of the ceiling support should follow the guidelines as presented in accordance with

the TANK Size.

10. Assembly of unassembled Side Panel

In order to carry in the interior stiffening element and assemble the ceiling panel, complete one

unassembled side using the same method.

M10

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11. Complete Assembly of All Bolts

11-1.Order of Assembly of Bolt & Washer Nut

The panels or interior stiffening element have not

been completely fastened yet. From now on, the

bolts must be completely fastened. Fastening

without following the prescribed order may cause a

crack which in turn will cause leaks. Carefully

observe the following order.

1. Assemble first the cross part Ⓐ of panels. At

this time, one worker must enter inside and

assemble the bolt in tandem with the outside worker.

2. Fasten Ⓑ part and assemble Ⓒ part.

3. The number of completely assembled bolts for

parts Ⓐ Ⓑ Ⓒmust be 2 pieces for each.

4. After the assembly of sections Ⓐ Ⓑ Ⓒis finished, assemble A→C,

A→B, A→A, and the remaining 3 sides must be assembled using the

same method.

5. When assembling the above side panel, observe Items 9 and 10 of

“What to Know before Assembly”

6. When assembly of the flange section of the side panel is finished,

assemble the side panel and the bottom panel.

Bolt the“T" part carefully: the additional use of 10cm of sealing

tape is effective in blocking any water leakage.

7. Then, complete the fastening of the bolts at the side panel

and ceiling panel following the same method as the bottom

panel.

8. The last assembly is the corner frame and side panel of the

corner section. As seen in Fig. 58, assemble equally both sides

of Ⓐ and Ⓑ.

9. Complete assembly of the cross stiffening plate.

Assemble referring to the figures for 6-2 and 8-2.

10. Completely assemble the interior stiffening element 4.

11. Assemble of tank and base frame

At item 2-3, the outside part of base frame is temporarily

assembled, fit the bolt hole of the side panel with a ratchet

and completely assemble the outside section of the base frame.

Fig 10-a

M10

Fig 10-b

Fig 10-c

- 22 -

12. Assembly of Items to be mounted on the Interior/Exterior of

Tank

12-1. Assembly of Ladder

The inside ladder and outside ladder must be assembled at

the position of a manhole.

12-2. Assembly of Fittings

1. Need for Assembly of Fittings

Fittings are needed to join the drainage pipes, Inlet,

outlet, and must be prepared and worked by an agency in

accordance with the customer’s request.

2. Order of Assembly of Fittings

1. Check the position for attachment, kinds and size of

various fittings in advance.

2. For flange fittings, mark to join each other (Fit both vertically and

horizontally).

3. Process using a hole saw that is suited to the fitting size, and drill around

the hole. (Figure is for a single plate)

4. For the insulation panel, process the insulation cover to be as large as the

size of the outer diameter of the flange with a primary hole saw, and remove; for

the secondary work, follow Item 3.

5. For a flange, apply sealing tape in 2 layers

6. To assemble the fitting, use a rubber-capped bolt (WBT-1460RD).

★When attaching flange types, the flange-joining hole must be fitted both vertically and

horizontally so that the handle can stand vertically when the valve is being attached as in the

right figure.

Fig 11-a

Fig 11-b

- 23 -

13. Working the Anchor Bolt

13-1. Anchor Bolt Figure

Fig. 13-a

13-2. Working the Anchor Bolt

1. On the base pad, the water tank assembler must

affix the anchor and bolts supplied by us at the

designate position.

2. When assembling the base frame, work and affix the

anchor bolt at the anchor bracket locked at the frame.

14. Cleaning of the Interior/Exterior of Tank

14-1. Cleaning Inside

1. As the Tank is used for storing drinking water, take out bolts, nuts, washers, and any other

remaining items, and clean the tank with a soft detergent.

2. Wash the sides and bottom clean using clean water 2～3 times.

3. When cleaning, be careful that no foreign substances come through the drain.

14-2. Cleaning Outside

1. Remove bolts, nuts and washers around the tank.

2. Take away any trash that remains from the assembly process.

3. Put tools in a designated place and clean the surroundings.

Fig 12-a

- 24 -

15. Watertight Test

15-1. How to do watertight test

1. In case the piping work is done by the building

facility side, close the Drain Valve and the Outlet

Valve, and fill with water.

2. At this time, fill the water level of tank to

250～300mm from the ceiling flange surface as in

the Figure.

3. Wipe clean the outside of the tank to ensure

there is no trace of wetness.

4. Carefully survey the flange, panel surface, bottom

surface, and corner.

5. Fill fully with water; the leakage test must be done during the day in full sun.

Avoid rainy or snowy days for testing.

6. In a basement or a building, lighting will be needed to see any water leaks.

7. Mark any leaking areas with a red pencil, determine the cause of the leak and take the

appropriate action.

15-2. Action for Water Leakage

1. If there is a leak, determine the cause, and take one of the following actions

Cause Action to be taken Remark

1. Poor

fastening of

Bolt, Nut

1. Check the fastening status of nut at the leaking section,

fasten completely with a ratchet.

2. If a weak bolt has been broken during assembly by the

fastening nut, it may cause leakage; change the bolt.

See Fig. 16-b

2. Entry of

foreign matter

into Sealing

part

1. Bolting where the washer or foreign matter enters the gap

of the flange sealing tape may cause leakage. If water is

leaking extensively, dismantling and reassembly will be

necessary.

2. If for minor leaks, treat with silicon caulk.

Silicon must be applied when the tank is completely dry.

When working with

silicon, curing time

is needed; fill water

after 24 hours of

curing.

3. Leakage at

crack of Panel

and Pin Hole

1. Leaks may occur at the crack of the corners of the SMC

Panel or pin hole. Drain the water in the Tank and treat

section with silicon.

See Fig. 16-d

Fig 13-a

- 25 -

2. Bolt Rupture

Although the Bolt and Nut appear to be fastened, the interior may be broken. When the tank is filled

with water, leaks can occur due to the water pressure.

16. Completion of Tank Installation

With installation of this tank, we have finished the complete construction without any water leaks.

However, even if you have done a thorough job based on extensive experience, every job requires new

preparation in accordance with the contents of this Manual.

Even for the skilled engineer, a large loss due to a minor error may occur on any project.

Always take do your utmost to avoid careless error.

Rupture

Even if a bolt is locked,

sand, washer or foreign

matter in the seal between

the panels may cause water

to leak from the gap.

Pinhole

Silicone Fig 13-b Fig 13-c

Fig 13-d

Fig 13-e