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INSTALLATION
In this installation, if the Primary Sump Pump (PSP) does not have a check valve installed below the wye, you MUST
install a check valve for the PSP as shown. This prevents backflow of water into the sump from the battery backup
system.
Check Valve Flapper(s) must swing away and flow arrow(s) must point away from the pump being protected.
The water level when the switch shuts off must be above the BBU pump intake.
FP979 (06-08-20)
Typical installation,
assembled.
* Supplied with the Battery Backup System.
Items in italics must be purchased separately
Both check valves must
be installed on the pump
side of the wye.
Optional 1-1/2"
PVC Pipe (cut to t)
45º Slip Elbow
Battery Backup
Switch*
1-1/2" PVC Pipe
(cut to t)
Flow Arrow; Must point
AWAY from Pump
being Protected
FP0026-10
Check Valve
(Purchase
Separately)
Lower Drischarge Pipe
1-1/2" PVC Pipe
(cut to t)
Drill 1/8"
Anti-Airlock Hole
1-1/4" FNPTx1-1/2"
Slip Elbow*
PTFE pipe thread
sealant tape on all
threaded joints
Battery Back Up
Sump Pump*
Figure 3: Common Discharge Pipe - Typical Installation
1-1/2" PVC Upper
Discharge Pipe
(cut to t)
U74-68 Hose and
Clamp Assembly
(Purchase Separately)
1-1/2" PVC Riser Pipe
(cut to t)
45 degree Slip Wye
AlternateWye/Elbow
Setup
45º Slip Street
Elbow
Primary Pump
Discharge Pipe
(cut to t)
Thread to Slip
Adapter
Primary Pump
Check Valve
Flow Arrow; Must point
AWAY from Pump
being Protected
Primary Sump Pump
Discharge Port
Not to scale.
Wiring omitted for clarity.
6783 0313a
9
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