Installation / Operation
Hazardous voltage. Can shock, burn or
cause death. Pump should always be electrically
grounded to a suitable electrical ground such as a
grounded water pipe or a properly grounded metallic
raceway, or ground wire system. Do not cut off round
ground pin.
6. If the pump discharge line is exposed to an outside
sub-freezing atmosphere, the portion of line exposed
must be installed so any water remaining in the pipe
will drain to the outfall by gravity. Failure to do this
can cause the water trapped in the discharge to
freeze which could result in damage to the pump.
7. Check the system operation by observing the pump
operation through one complete cycle.
Risk of flooding. Failure to make this
operational check may lead to improper operation,
premature failure, and flooding.
OPERATION
Hazardous voltage. Can shock, burn or
cause death. Do not handle a pump or pump motor with
wet hands or when standing on wet or damp surface, or
in water.
Before attempting to check why a unit has stopped oper-
ating, disconnect power from the unit.
1. The shaft seal depends on water for lubrication and
cooling. Do not operate the pump unless it is sub-
merged in water as seal may be damaged if allowed
to run dry.
2. The pump will not remove all water. On a flat surface it
will pump down to within 1/8" of the pumping surface.
NOTICE: For long cycle times, the pump must be
submerged to prevent the motor from overheating. A
fully submerged pump is preferred for proper cooling
when a pump runs continuously.
AIRLOCKS
When a pump airlocks, it runs but does not move any
water. An airlock will cause the pump to overheat and fail.
The pumps have a built in anti-airlock hole. See Figure 1
for the location of the hole. Water leakage from the anti-
airlock hole is normal.
If you suspect an airlock, unplug the pump, clean out the
anti-airlock hole with a paper clip or a piece of wire, and
restart the pump.
For parts or assistance, call Master Plumber Pump Customer Service at
Figure 1: Anti-airlock hole is located under volute;
remove screen as shown for access.
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Figure 2:Typical uses
1-800-628-9439
Anti-Airlock Valve
(Remove screen
and look under
pump for access)
Dewater flat roofs
Roofs
Empty flooded rooms
Basements
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3696 0500 NEW
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