5595000B
Copyright © Liberty Pumps, Inc. 2022 All rights reserved.
7 | EN
Discharge Line
Make all discharge connections. 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 the pump outlet size. 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 fiberglass basin provided with the system must be completely
sealed and properly vented per local health and plumbing code
requirements. If the system is to be vented through the inlet to an
existing building vent stack, there must be no traps between the
system inlet and the nearest building vent stack connection
(option 1). If this is not possible or desirable per the application, a
standalone vent can be installed in tank side (option 2) or a vent
flange or grommet can be installed in a hole cut into the cover
(option 3).
Guide Rail Systems
If guide rails are used, refer to the separate installations supplied
with the unit for proper operation.
Opera tion
Energizing the control panel or breaker for the first time is
potentially dangerous. Licensed electrical personnel should
be present when the panel or breaker is energized for the first
time. If faults caused by damage or poor installation practices
have not been detected, serious damage, injury or death can
result when power is applied.
Bulkhead
Connection
Pump Station
Compression
Adapter
Fitting
Curb Box
Compression
Adapter
Fitting
Valve Extension
Rod Shown
Curb Stop Valve/Swing
Check Valve Assembly
To Pump
To Main
Flow
Grade
RISK OF SERIOUS INJURY OR DEATH
option 1
option 2
option 3
Discharge
ground level
Sewage line
