Pahlen
Suction Restriction / Air Leak
Pahlén pool pump runs but the pressure on the filter gauge is very low and suction at skimmer is weak
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Clogged skimmer line, Air leak at pump lid or suction unions, Partially blocked impeller, Collapsed flexible suction hose
How to Fix / Troubleshooting
Safety first: Turn off the pump before opening any part of the suction line.
- Clean skimmer lines: Remove baskets and use a suitable hose or line cleaner to clear obstructions from skimmer pipes.
- Check for air leaks: With the pump running (briefly), look for air bubbles under the Pahlén pump lid and in the pool returns. Then stop the pump and tighten suction-side unions and lid.
- Inspect impeller: Open the pump wet end and clean any debris from the impeller eye and vanes.
- Replace damaged hose: If flexible suction hose is kinked or collapsed, replace it with rigid PVC or new hose of the correct size.
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Repair Difficulty
Medium
3/5
Required Part
Suction Union O-Rings
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