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Pump Installation
Backup Assembly Installation
Attach backup pump assembly to primary pump. To do
so, un-screw bottom nut on check valve and remove
rubber seal. Place nut from check valve around discharge
PVC pipe on primary pump, then place rubber seal.
Attach backup pump assembly to the primary pump by
tightening nut to the rest of the check valve unit.
Adjust backup pump to sit at an angle (approx. 10°).
Float Switch Installation
Assemble float switch as shown.
(10° angle)
Combo Unit Installation
Suggested Materials Needed:
Screwdriver, tape measure, hacksaw, cable ties
1. Drain the sump pit as far as possible without running
the pump dry. Do this by:
A. P
iggyback switch
from the outlet, then unplug the pump from the
piggyback switch. Reset the circuit breaker or
reinstall the fuse and plug the pump directly into
the outlet. The pump will start. Drain the pit and
unplug the pump. OR
b. N
o piggyback switch
or reinstall the fuse and use a non-conducting
broom handle or stick to raise the float switch;
the pump should start. Drain the pit and then
release the switch.
c. When the pit has drained, turn off (open) the
circuit breaker or remove the fuse again to avoid
electrical shock while working on the installation.
Unplug existing sump pump and place power cord
and piggyback switch out of the way of work and
water.
2. Measure height of MBSP-3C Combo Kit from base to
top of hose clamp assembly. Subtract 1".
Drop the tape measure into the bottom of sump pit
and mark the cut line on the discharge pipe (1" less
than total height of the Combo Kit).
3. Use hacksaw to cut horizontally along cut line com-
pletely through pipe.
NOTICE Depending on where your current check
valve is located, there may be excess water. Let the
water drain/drip into the sump pit.
4. Remove old sump from sump pit.
NOTICE Remove all sand, clay, and gravel before
installing.
5. Place Combo Kit into sump pit. Make sure vertical
float switches can operate freely inside sump pit.
: Unplug the pump and switch
: Reset the circuit breaker
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