Liberty Pumps 441 Manuel D'installation page 9

8. Mount the pre-assembled vertical pump switch to the new
discharge pipe with the provided clamp. Adjustments may be
needed later and can be achieved by loosening the clamp
and sliding the switch bracket up or down on the discharge
pipe to attain the desired activation level.
9. Continue to Final Assembly (Method A) on page 11.
Assembly Method B
For Method B, both pumps are installed on the floor of the sump
pit. The minimum required sump basin diameter is 18" at the
bottom of the pit, and the minimum recommended depth of the
sump basin is 18".
IMPORTANT: There must be a check valve installed in the primary
sump pump discharge pipe between the tee and the primary
sump pump. This will prevent water from recirculating back into
the pit through the primary pump when the back-up sump pump
turns on.
Back-up Pump Installation (Method B)
• Not to scale
• Wiring omitted for clarity
Hose coupling
with clamps
(not supplied)
FIRST CUT
pump switch
Cut-off piece of 14
discharge pipe
12
1-1/2" to 1-1/4"
reducer tee with
glued pipe nipple
(provided)
11
SECOND CUT
10
Add 1-1/4"
close pipe
Discharge pipe
nipples as
(may vary)
(not supplied)
8
Hose coupling
with clamps
(not supplied)
1-1/4" Elbow
(not supplied)
Primary sump
pump check valve
and adapter
Figure 5. Installation Method B
4414000D
Back-up
1-1/4" Elbow (not supplied)
9
WATER FLOW-
7
THRU VALVE
(the valve flap
opens away from
the pump outlet)
6
1
5
Check valve
assembly
needed
(provided)
4
1
3
1
2
Back-up pump
discharge port
Copyright © Liberty Pumps, Inc. 2019 All rights reserved.
1. Apply (2) wraps of thread seal tape to all threads.
2. Thread a 90° elbow onto the discharge of the back-up pump.
Take care not to overtighten and strip threads.
3. Thread one of the close pipe nipples into the elbow.
4. Thread the check valve assembly onto the close pipe nipple.
IMPORTANT: Make sure the check valve is installed in the
correct direction. See the inset drawing in Figure 5.
5. Thread a close pipe nipple into the other end of the check
valve.
6. Thread the second 90° elbow onto the pipe nipple.
7. Thread the tee pipe nipple into the elbow and set this
assembly aside.
8. Install a short length of pipe into the top of the check valve in
the primary pump discharge. If there is no check valve on the
primary pump, install now.
9. If the discharge pipe is 1-1/2", the reducer bushings are not
needed and should be removed. If the discharge pipe
diameter is 1-1/4", remove the reducer bushings. Position (will
be cemented later) them into the tee.
10. Using the assembled back-up pump, mark a line on the
primary discharge where the tee sits. Measure the socket
depth (interior ridge) inside the tee. Add that amount over
the line and make a cut.
11. Slip the tee and the back-up pump subassembly onto the
short pipe exiting the primary pump.
12. Position (will be cemented later) the cut-off piece of pipe into
the top of the tee (with reducer bushing if 1-1/4" pipe).
13. Clean the pipe ends with a cloth towel and set the cut-off
piece of discharge pipe aside.
14. Mount the pre-assembled vertical pump switch to the
discharge pipe above the tee with the provided clamp.
4
Adjustments may be needed later and can be achieved by
loosening the clamp and sliding the switch bracket up or
down on the discharge pipe to attain the desired activation
level.
15. Continue to Cut the Discharge Pipe (Methods B & C) on
page 11.
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