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Problem Possible Cause Corrective Action
Pump does not run when water flows in
from the sink.
1. The pump is unplugged.
2. There is no power to the outlet.
3. The pump impeller is jammed.
4. The sink stopper is in the drain.
1. Plug in the pump.
2. Check the fuse / breaker.
3. Unplug the pump and follow the procedure
under “Maintenance” to clear the pump.
4.
Remove stopper.
Pump runs but does not empty the sink. 1.
The drain is clogged.
2. The discharge line is clogged.
3. The shut-off valve is closed.
4. The system discharge line is too high or
too long.
5. The check valve is installed backwards.
1.
Clear the drain screen.
2. Unplug the pump. Then open and clear
discharge line.
3. Open shut-off valve slightly.
4. Unplug the pump or reduce the height or
length of the discharge line (11 ft. Max.
Height).
5. Make sure the flow arrow on the check valve
points away from the pump.
Pump cycles on and off when no water
is in the sink.
1. Check valve is not installed.
2. Check valve is jammed.
1. Unplug the pump and install the check valve
(see Figures 2 and 3).
2. Unplug the pump. Then open the discharge
line and clean the check valve.
Pump cycles on and off when the sink
is at maximum water flow or is full.
1. Shut-off valve is not adjusted.
2. Shut-off valve is not installed.
1. See “Adjusting the Flow”.
2. Unplug the pump and install a shut-off valve
(see Figures 2 and 3).
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