Install Instructions

IMPORTANT: All Liberty Pump models are supplied with their own separate Installation/Operation/Maintenance

manuals. Ensure that you have received these manuals, and that you read and understand them prior to installing this

unit. If you have any questions, call Liberty Pumps customer service at (800) 543-2550.

GR22 and GR30 Assembly

The GR22 or GR30 quick disconnect assembly provides easy installation and

removal of the pump. When installed correctly it will seal and provide support

for the pump. Please ensure that installation is done as per the diagrams

below.

The rail system comes in three parts:

1) Base: This is the large casting that is mounted to the floor of the

pumping chamber or vault. ½” studs are recommended spaced at 5.5”

apart.

2) Pump mounting claw: Liberty offers three different pump mounting

claws. The LE claw and GR30 claw have a larger flange and fits

LE70-Series, LE100-Series, LEH100-Series, LEH150-Series and

LEH200-Series sewage pumps. The FL claw mates to FL100-Series,

FL150-Series and FL200-Series effluent pumps. Both GR22-LE and

GR22-FL claws are threaded 2” FNPT for optional mounting

applications. The GR22-S claw has a 2” NPT male thread for pumps

with threaded discharges.

3) Support bracket: A small casting is supplied and is used to support

the top end of the 1-1/4” guide rail pipe (pipe not included). This

casting needs to be mounted to a support structure, bar stock, angle

iron, or other means that attaches to the side walls of the vault. Note,

heavy guide rail pipe 1-1/4” Galvanized or Stainless Steel is

recommended.

All the claws have a sealing grommet attached to it that provides the seal

between the claw and base unit. This seal requires no maintenance. On

GR30, GR22-LE, AND GR22-FL a gasket should be used between the claw

and pump – the gasket and mounting hardware are provided with the

pump. The stock flange that is shipped with the pump should be removed and

replaced with the claw.

The GR22-S features a split design for

pumps without a flange. The threaded

base can be screwed into the pump’s

discharge and then the claw and

gasket can be mounted.