4
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.
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 TL-Pro 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 the piping.
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.
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 ball check valve and
rail guide assembly to the grinder
pump discharge with bolts and
washers provided.
Risk of electrical shock or
electrocution. May result
in serious injury or death or
fire hazard. To reduce risk of
electrical shock, do not connect
conduit to pump .
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.
Step 1:
If the system is supplied with a
float bracket, attach float switches
to the float bracket by clamping
strain relief bushings around the
float cords, then inserting and
twisting the bushings into the
float bracket slots.
Step 2:
After grinder pump attachments
have been made, lower the pump
unit down the rails and ensure ball
check valve aligns and connects
properly with base elbow in basin
bottom.
Junction Box Systems:
Step 1:
Ensure power source is off or
dis con nect ed.
Step 2:
Push pump power, seal failure/heat
sensor, and float cords through
cord grips in the junction box and
tighten. To prevent corrosion or
electrical short, plug any unused
holes.
Internal Basin
Installation
Instructions
Internal Basin
Connections
