Use and Care Manual

The preferred material for backfill surrounding and covering
the tank is a sand/gravel mixture as described below. 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 1½", and about 50% smaller than ¼".
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.
Underground Tank Installation Instructions
A. Excavate to a depth that will provide a
minimum of 6" and a maximum of 30"
of cover over the top of the tank. This
will avoid collapse and over-expansion
of the tank and possible leakage.
B. Allow 18" to 24" on both sides and both
ends of the tank. Failure to comply with
allowance ranges could cause tank collapse.
C. The preferred tank bedding material is well packed sand with
minimums of 6" in soil terrain and 12" in rock terrain. Native soil
can be used if it is flowable, compactable, rock free, and can
provide uniform tank support in the recessed rib areas. The tank
should be installed level.
1. EXCAVATION
A. Install bulkhead fittings in either side
of manway or end rib as shown.
B. Tank must be vented.
C. For water-tight seal, lid should be
sealed with silicone caulking. Re-use
stainless steel screws supplied with
lid.
3. WATER TANK CONNECTIONS
5. BACKFILLING EXTERIOR
2. SEPTIC & BRUISER TANK
INLET/OUTLET
CONNECTIONS
4. MANHOLE EXTENSIONS
6. BACKFILL MATERIALS
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.
A. Septic tanks 750 gallons and larger
and blue BRUISER tanks are supplied
with PVC sanitary tees and adapters at
the inlet and outlet. The PVC adapter
has two sockets for use with either 4"
schedule 40 pipe or 4" SDR 35 pipe.
B. Inlet and outlet piping should be solvent welded to the adapters
using standard PVC cement.
C. Tanks without PVC adapters (200, 300 and 500 spheres and
500 septic) use Part No. 61765 gasket kit.
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.
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C
B
A
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