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Backfill
Instructions
The
authority
jurisdiction has the right to
require alternative materials or
procedures for backfilling the
installation.
Failure to properly backfill
may result in damage to the
basin which could cause leaks
or structural failure. Failure to
follow these backfill instructions
during the installation of the
basin voids the basin warranty.
In freezing conditions the backfill
must be dry and free of ice. Do
not use other backfill materials.
Failure to use the recommended
bed and backfill materials during
the installation of the basin voids
the basin warranty.
Step 1:
Obtain proper backfill material.
The backfill material provides
as much as 90% of the basin's
support under certain stress
conditions. The installer must
be positive that correct bed and
backfill materials are used per
instructions as follows:
A. Gravel – clean and free
flowing with particle size not
less than 1/8" nor more than
3/4" in diameter. Use this
description when ordering or
specifying as material varies
upon geographical location.
This material is commonly
known as "pea gravel".
4
B. Stone or gravel crushings with
angular particle size of not
less than 1/8" nor more than
1/2" diameter, washed and
free flowing, is acceptable as
an alternative material.
having
Step 2:
At least a 4–6 inch wide band
of compacted aggregate must be
placed in successive layers (6"
lifts) around the entire periphery
of the basin. Carefully compact
aggregate under all piping and
electrical lines. Cover grade
should slope down 3" to the
normal surrounding grade. Care
must be taken to prevent damage
to any influent, discharge, or
electrical connections made to
the basin.
Internal Basin
Installation
Instructions
Unpacking Pump:
Remove
pump
When unpacking unit, check for
concealed damage. Claims for
damage must be made at the
receiving
delivery carrier. Damage cannot
be processed from the factory.
Systems Description:
Factory built basin systems are
available in 24" and 30" diameter
basins with 60" through 156"
depths in one-foot increments. In
a flex hose system, the pump is
raised and lowered in the basin
using rope or chain attached to
pump and lifting handle attached
to ball check valve. A hydraulic
sealing diaphragm on ball check
valve allows the pump to be
removed without disconnecting
piping.
from
carton.
end
through
the
Application:
These pump systems are designed
for pumping effluent or sewage
water with a pH ranging from 5
to 9, specific gravities from 0.9 to
1.1, viscosities ranging from 28
to 35 S.S.U. and temperatures up
to 140°F.
Pump Models:
The basin system may employ any
1 through 2 HP submersible grinder
pump that uses cutter blades to
grind solids into a slurry. Refer
to the pump service manual when
adjusting, dismantling, or repairing
the pump.
Inspection:
Check to be sure that all items for
your particular system are included,
and that the phase and voltage on
the pump nameplate are correct
as ordered. Codes: All local codes
must be observed. Consult the local
inspector(s) before installation to
avoid costly delays or rework.
Grinder Pump Attachments:
Step 1:
Attach the stainless steel foot
bracket to bottom of the pump
with bolts and washers provided.
Apply Pipe:
Step 2:
Apply thread sealant to pipe
threads and screw the discharge
piping assembly into the pump
discharge.
Step 3:
Attach lifting chain, cable or rope
as supplied to the lifting eye bolts.
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