Install Instructions

7034000N Copyright © Liberty Pumps, Inc. 2022 All rights reserved. 7 | EN
Discharge
A check valve is required to prevent the backflow of liquid after
each pumping cycle. A gate valve should follow the check valve to
allow periodic cleaning of the check valve or removal of the pump.
The remainder of the discharge line should be as short as possible
with a minimum number of turns to minimize friction head loss.
Do not reduce the discharge to below that which is provided
on the pump. Larger pipe sizes may be required to eliminate
friction head loss over long runs. Contact Liberty Pumps or other
qualified person if questions arise regarding proper pipe size and
flow rates.
Pressure Sewer Applications
A redundant check valve assembly consisting of a curb stop and
check valve must be installed between the pump discharge and
the street main, as close to the public right-of-way as possible, on
all pressure (force main) sewer installations to protect from system
pressures. The curb stop valve is necessary to isolate the site from
the pressure sewer while the check valve provides redundant
protection against potentially detrimental backflow. All valves and
fittings should be rated for at least 200 PSI service. See Liberty
Pumps line of CSV-Series Curb Stop/Swing Check Valve
Assemblies and CK-Series Connection Kit.
Vent
The basin must be completely sealed and properly vented per
local health and plumbing code requirements. The system is
designed to be vented through the inlet to an existing building
vent stack. In order to accomplish this, there must be no traps
between the system inlet and the nearest building vent stack
connection. If this is not possible or desirable per the application,
a vent flange or grommet can be installed in a hole cut into the
cover.
Piggyback Switch Operation
 Single-phase 208/230V pumps shall only be operated without
the float switch by using the circuit breaker or panel
disconnect.
IMPORTANT: Verify breaker is turned off before plugging in the
switch.
Plug the piggyback switch into the receptacle. The receptacle
must be wired to an appropriately sized breaker. Plug the pump
into the piggyback receptacle. Install the cable clamp (if supplied)
for strain relief.
Figure 1. Piggyback Switch Operation
Bulkhead
Connection
Pump Station
Compression
Adapter
Fitting
Curb Box
Compression
Adapter
Fitting
Valve Extension
Rod Shown
Curb Stop Valve/Swing
Check Valve Assembly
To PumpTo Main
Flow
Grade
RISK OF ELECTRIC SHOCK
SYSTEM
VENT
DISCHARGE
Ground Level
Optional Above Ground Vent
SEWAGE LINE
INDOOR APPLICATION
OUTDOOR APPLICATION
Temporary Manual
Operation
YES!NO!
Install cable
clamp to wall
for strain relief
Temporary Manual
O
p
eration
YES!NO!