Sentry STWB140 Manual page 4

Check Valves
Water-Powered
Backup Pump
Primary Pump
Vertical Installation
Couplings
Incoming Water
Supply
On/Off Float
On/Off Float
IL2311
6
For horizontal installation
Mount backup pump directly to floor joists using
included lag bolts and washers.
Note: The backup pump can be mounted with the
discharge to the right or left. Ensure the mounting
bolts are always positioned at the top.
Rotate elbow to be in same orientation as
pictured (default position)
For vertical installation
Mount backup pump directly to primary pump
discharge pipe using included pipe clamps.
Rotate elbow to be in same orientation as
pictured.
Ensure Inlet fitting is at least 6-in. above the
basement floor or top of the sump pit.
This pump is to be used as a
backup to your primary pump. Make certain that
there is no interference between the two pumps,
especially between the float systems.
Installation of suction pipe and included
foot valve
The desired location of the foot valve is 2-3-in.
above the bottom of the sump pit.
Measure the distance from the rotating elbow to
the desired location of the foot valve. Cut 1-1/4-
in. pvc to measured length. Dry fit the piping to
the elbow and foot valve to verify pipe length is
correct.
Lag Bolts
Rotating Elbow
Pipe Clamps
Backup Pump
Elbow
Primary Pump
Discharge Pipe
Rotating
Elbow
Distance from
elbow to
foot valve
location
Foot Valve
Location
7