How to Guide

1. Decide if pump will be installed in the sump basin (vertically) or in out-of-sight in
rafters (horizontally)
2A. For vertical
installations in a
sump basin, attach
backup pump to
primary pump
discharge pipe.
2B. For horizontal installations in rafters,
mount pump to oor joists.
3. Install oat valve a few inches above the
ON position of the primary pump.
4. Install 1-1/2-in discharge piping. 5. Install source water piping to bring a city
water line to the pump.
Check
Valves
Primary
Pump
Water-Powered
Backup Pump
On/Off Float
On/Off Float
Incoming
Water
Supply
Ceiling Joist
Backup Pump
Pipe Clamps
Primary Pump
Discharge Pipe
Rotating Elbow
Lag Bolts
Primary
Pump
A few
inches
Float
On level
Discharge
Pipe
1-1/2-in. Slip Coupling
Pump
Discharge
Elbow
3/4-in CPVC,
PEX or
copper pipe
WATER-POWERED
BACKUP
SUMP PUMP
No electricity
required
MODEL # STWB140
BasementSentry.com Toll Free Help Line: 1-800-742-5044
SW1478 A
6. Adjust the control valve and test system
operation.
Locknut
Thumb
Screw
Check
Valves
Primary
Pump
Incoming Water
Supply
Water-Powered
Backup Pump
On/Off Float
On/Off Float
SEE INSTRUCTION MANUAL FOR
IMPORTANT SAFETY WARNINGS.
Vertical Installation Horizontal Installation