Assembly Method C; Back-Up Pump Assembly - Liberty Pumps 441 Manual De Instalación

Assembly Method C

For Method C, the back-up pump is installed above the primary
sump pump. The minimum required sump basin diameter for this
type of installation is 13.5" at the bottom of the pit, and the
minimum recommended depth of the basin is 22".
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 C)
•
Not to scale
•
Wiring omitted for clarity
Rotate back-up pump
45° to prevent airlock
1
2
Back-up pump
Check valve
discharge port
assembly
(provided)
Primary pump
discharge pipe
2
WATER FLOW-THRU
VALVE
(the valve flap opens away
from the pump outlet)
Figure 6. Installation Method C
– 10 –
Hose coupling
with clamps
(not supplied)
Back-up
FIRST CUT
pump switch
13
Cut-off piece
of discharge
pipe
8
3
Tee
(provided)
10
7 SECOND CUT
Hose coupling
with clamps
(not supplied)
Primary
sump pump
11
check valve
and adapter
Copyright © Liberty Pumps, Inc. 2019 All rights reserved.
1. Apply (2) wraps of thread seal tape to all threads.
2. Thread the check valve onto the back-up pump discharge
ensuring that the valve housing and inner valve flap are
oriented correctly. Refer to inset in Figure 6.
3. Thread the tee/nipple assembly into the check valve.
4. Tighten the tee into the close nipple. If needed, hold the
check valve with the channel locks, insert the screwdriver into
the tee for leverage, and tighten the tee with the screwdriver.
Finish with the tee in a straight up and down (vertical)
position and the pump oriented at a 45° angle to prevent
airlock.
5. Clean the pipe ends with the cloth towel.
6. If the discharge pipe is 1-1/4", prime and cement the reducer
bushings into the tee. Position (will be cemented later) the
pipe into the bushing.
7. 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.
8. Position (will be cemented later) the cut-off piece of discharge
pipe into the top of the tee.
9. Clean the pipe ends with a cloth towel and set the cut-off
piece of discharge pipe aside.
10. Slip the tee and the back-up pump assembly onto the short
pipe exiting the primary pump.
11. If there is no check valve on the primary pump, install now in
the primary sump pump discharge pipe between the tee and
6
the pump.
12. Position (will be cemented later) the assembly onto the
primary discharge pipe.
13. Mount the back-up pump float switch assembly loosely to the
discharge pipe per Figure 7. Do not fully tighten the clamp at
this time as adjustments may be needed later.
14. Continue to Cut the Discharge Pipe (Methods B & C).
4414000D