Plastic / Polyethylene Septic Tanks & Water Tank Installation Guidelines

PolyWaterTanks.com is a subsidiary of Tank-Depot.com

                 Poly Water Tanks.com Home Page
 
Lowest Prices!  Fast Shipping!
Order online now!
 
Water Tanks Septic Tanks RV Water & Holding Tanks Specialty Water Tanks
Septic Tanks
Underground Septic Tanks

 

Septic & Water Tank Installation Guidelines

Other Products:
Poly/Plastic Septic Tanks - Single Compartment Septic Tanks
Polyethylene Plastic Septic Tanks - Double Compartment Underground Septic Systems
Poly/Plastic Holding Tanks - Septic Systems
Septic Tanks - Underground Storage Tanks
Tank Accessories - Manways, Lids & Vents

 
1.SEPTIC TANK EXCAVATION
A. Make sure your excavation provides a mininum of 6 inches and maximum of 30 inches of cover over the top of the tank. This will stop the tank from collapsing or over-expanding and possibly leaking.

B. Allow 18 inches to 24 inches on each side and both ends of the plastic tank. Failing to follow and comply with these directions can cause your tank to collapse.

C. Use well packed sand to bed the tank - at least 6 inches mininum in soil terrain, 1 foot minimum in rock terrain. Make sure that the septic tank is level when you install it.

2. SEPTIC TANK CONNECTIONS  
A. 750 gallon and larger septics tanks and the blue BRUISER plastic tanks are supplied sanitary PVC tees and inlet and outlet adapters. The PVC adapter has two sockets for use with two different sizes; either 4” SCH 40 pipe, or 4” SDR 35 pipe.

B.It is important that your Inlet and outlet piping should be attached to the adapters using standard PVC cement to solvent weld the piping.

C. Tanks without PVC adapters (300 sphere, 500 sphere and 500 septic) use a seperate Part No. 61765 gasket kit.

3. INSTALLING THE WATER TANK CONNECTIONS  
A. When installing the water tank connections you should install the bulkhead fittings in the side of the end rib or manyway as shown in the diagram,

B. You have to make sure that your septic tank is properly vented.

C. To ensure that the seal is water-tight, use silicone caulking to seal the connections.

4. MANHOLE EXTENSIONS  
A. Install manhole extension before you backfill.

B. Manhole extensions are supplied with gaskets and screws. Re-use the lid gasket and screws to attach the lid at the top of the manhole extension.

C. Note the direction of flow. The inlet is higher than the outlet.

5. BACKFILLING EXTERIOR  
A. CAUTION. Fill tank with water as you backfill, keeping water level even with backfill, level as you go to prevent possible collapse.

B. Backfill with 12” layers and compact each layer. ALWAYS COMPACT ENDS FIRST.

C. Tamp and compact backfill under inlet and outlet pipes.
D. Maximum backfill over the top of the tank is 30” Mound soil over the top to provide positive drainage

6. BACKFILL MATERIALS  
For blue BRUISER tanks and white cistern tanks, native soil may be used for backfill and those tanks may be left empty while backfilling. For yellow and black septic tanks, the sand/gravel mixture is required and the tanks must be filled with water during the backfilling process. BRUISER tanks and cistern tanks should be filled one-fourth full after installation.

A. The sand/gravel mixture should be a mixture of sand and gravel, 100% smaller than 1-1/2” and about 50% smaller than 1/4".

B. All fill should be free of any wood, masonry debris, silt or clay.

FOR SEPTIC INSTALLATIONS, IT IS IMPORTANT TO CONTACT YOUR LOCAL OR STATE SANITARIAN REGARDING APPROVED INSTALLATION PROCEDURES.

CAUTION

FAILURE TO COMPLY WITH THE POINTS BELOW VOIDS WARRANTY

A. Do not install any tank in water saturated clay or in a high water table. The tank may collapse and its contents will escape.

B. Tanks are not fire resistant. Do not store them near an open flame or heat in excess of 180° F.

C. Do not install any tank under the path of vehicles or heavy equipment.

D. If a yellow or black septic tank is pumped for normal maintenance, it should be refilled immediately. If a blue BRUISER tank or a white cistern tank is pumped empty, it should be refilled to one-fourth of capacity. Spherical 300 and 500 gallon tanks may be left empty.

E. Norwesco yellow and black septic tanks, blue BRUISER tanks and cistern tanks are designed only for use as underground tanks.

F. Norwesco yellow or black septic tanks, with the exception of 300 and 500 gallon spherical tanks, cannot be used as holding tanks or pump tanks because the tank may collapse if it is left empty underground. Blue BRUISER tanks, white cistern tanks, and 300 or 500 gallon spherical tanks can be used for holding or pumping applications where permitted by local codes.

G. White cistern tanks and blue BRUISER tanks are made of resins that meet FDA specifications for the storage of drinking water and can be used for that application. Yellow septic tanks and black septic tanks must not be used for drinking water.

H. Protect the tank from sharp objects which could puncture it and cause leakage.

Norwesco advises against the use of a plastic underground tank for any other uses! Such uses would void any Norwesco product warranty either stated or implied. In no event shall Norwesco be held liable for any consequential damages.
 

WARRANTY

The Norwesco underground tanks, when installed in accordance to manufacturer’s instructions, are warranted against defective materials and/or workmanship for a full three (3) years from date of manufacture. Should a defect appear within the warranty period, Norwesco will supply a new, equivalent tank in replacement thereof. Norwesco’s liability is limited to the value of the tank itself and specifically excludes the cost of installation and/or removal and consequential damages.

NORWESCO, INC.
P. O. Box 439
4365 Steiner Street
St. Bonifacius, MN
55375-0439

 

© Copyright 2012 Tank Depot

Email us: info@polywatertanks.com