The Authority Having
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 installation
of the basin voids the basin
warranty.
Risk of electrical shock or
electrocution. May result in
serious injury or death or fire
hazard. Failure to properly
support electrical conduit, lines
and connections may result in
structural failure. Electrical
connections may be damaged,
exposing live electrical
connections.
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
3
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. Clean
cut hole and apply a sealant
coating to the cut section to
prevent deterioration. Insert the
inlet grommet into the drilled
hole.
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 shutoff valve and
redundant check valve be located
outside the basin at any force main
entrances – check local codes for
specific requirements.
Step 1:
The pad under the basin requires
4 to 6 inches of appropriate fill.
The ideal basin pad is concrete
in conjunction with antiflotation
tie-down studs. Basin antiflotation
tie-down kits are available. If
concrete pad is not used, the
aggregate must be compacted to
a minimum 85% standard proctor
density per ASTM D698, or as
required by the Authority Having
Jurisdiction.
Concrete pad or aggregate surface
must be leveled flat and free of
voids to conform to the basin
bottom. Basin bedding depth
should be calculated such that the
basin top will protrude 3" above
the normal grade upon final
installation.
Step 2:
Lifting of the basin may be
done with a nylon or other non-
damaging type material sling.
Do not wrap a chain or steel
cable around the basin as damage
may result. Do not attach lifting
mechanism around discharge hub
or electrical hub.
Step 3:
Lower the basin into excavation,
position and level properly. Mount
basin to base anchor bolts if an
antiflotation tie-down kit is used.
Seal off any cuts or scratches to
prevent deterioration.
Step 1:
An inlet grommet is the standard
supplied influent connection
device. If another type of inlet
Influent and
Discharge
Connections
PIPE
HOLE SAW
SIZE
DI AM E TER*
3"
4"
4"
5"
6"
7"
* Contact the factory for availability
of proper size hole saw if necessary.
Backfill
Instructions
