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INFLUENT AND DISCHARGE
CONNECTION INSTRUCTIONS
Influent and Discharge Connections for
Fiberglass Basins:
Step 1: An inlet grommet is the standard supplied
influent connection device. If another type of inlet hub
is used, refer to the directions included with the hub.
Determine point at which influent line will enter basin
and, using a properly maintained piloted hole saw
sized per chart below, drill a hole through the basin
wall. If using a fiberglass basin, clean cut hole and
apply a sealant coating to the cut section to prevent
fiberglass deterioration. Insert the inlet grommet into
the drilled hole.
Pipe Size
Hole Saw Diameter
3"
4"
4"
5"
6"*
7"
*6" pipe size requires use of fiberglass basin.
WARNING – Failure to use a properly piloted hole
saw may result in damage to basin which may
result in structural failure or serious leaks.
Step 2: Lubricate inside lip of inlet grommet with pipe
soap. Clean outer end of influent pipe and push pipe
through grommet. Ensure pipe does not protrude
inside basin so as to interfere with pump removal or
float operation.
Step 3: Close shut-off valve and make discharge
line connection. It is strongly recommended that
an additional shut-off valve and redundant check
valve be located outside the basin at any force
main entrances – check local codes for specific
requirements.
BACKFILL INSTRUCTIONS
The authority having jurisdiction has the right to
require alternative materials or procedures for
backfilling the installation.
WARNING – 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.
CAUTION – 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".
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.
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
Remove pump from carton. When unpacking unit, check
for concealed damage. Claims for damage must be
made at the receiving end through the 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 an
SRA-125 system, the pump is raised and lowered in the
basin using rope or chain attached to the pump. This
system includes an integrated ball check valve assembly
that slides up and down the dual rails allowing the pump
to be removed without disconnecting piping.
Pump Models: The basin system may employ any
centrifugal 1 through 2 HP submersible grinder pump
that uses cutter blades to grind solids into a slurry. These
pump systems are designed for pumping effluent or
sewage water only.
Grinder Pump Attachments:
Step 1: Attach the ball check and rail guide assembly
to the grinder pump discharge with bolts and washers
provided.
Step 2: Attach rope or chain as provided to the guide
plate lifting eye. A hook is located on the top rail support
to hold the upper end of the chain or rope when not
in use.
Step 3: Position pump so the guide rails are located
in the slots of the guide plate. Slowly lower the pump
down the guide rails to the base. The locating pins
(horizontal pin on seal plate) should come to seat in
the inclined surface on the arms.
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