©Copyright 2015 Liberty Pumps Inc. All rights reserved
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FLOAT SWITCH INSTALLATION
The engineering drawings will normally specify the levels for pump start and stop and high level alarm. If
they are not specified, these guidelines should be used to determine float switch locations.
PIGGY BACK SWITCH
(1-Float System, wide angle)
Pump Off:
Factory set. (3.5” tether)
Pump On:
Factory set. (3.5” tether)
(1-Float System, vertical float)
Pump Off:
Factory set. (2” from bottom of float rod)
Pump On:
Maximum travel on float rod.
SIMPLEX PUMP STATION
(3-Float System)
Pump Off:
Level to top of motor housing.
Pump On:
Minimum 1-1/2 ft. above Pump Off Level.
High Level Alarm:
Minimum 1 ft. above pump ON level. Below influent pipe.
DUPLEX PUMP STATION
(4-Float System)
Pump Off:
Level to top of motor housing.
Lead Pump On: Minimum 1-1/2 ft. above Pump Off level.
Lag Pump On: Minimum 1 ft. above Lead Pump On level.
High Level Alarm:
Minimum 1 ft. above Lag Pump On level. Below influent pipe.
