drain pump clogged

Vertical Immersion Pump Troubleshooting Guide

Vertical Immersion Pump Troubleshooting Guide

If you are experiencing issues with your Vertical Immersion Pump, the below guide can help you diagnose any issues, or speak to one of our Technical Sales Engineers for further assistance:

ProblemPossible CauseRemedyZero Fluid DeliveryAir within Pump Ensure pump is fully primed. Insufficient Manometric Head Requirements of system exceed that of pump. Check system losses, against pump specification. Check pump impeller. Reverse Operation Check direction of rotation is correct Impeller clogged or valve clogged Remove obstruction Reducing flow or none at allWater liquid level in pit is too low. Pump is handling water with air Increase liquid level in tank, or stop pump before reaching low level Increase of Manometric Head Pump is underspecified. Increase impeller diameter and motor size Impeller or suction strainer clogged Clear blockages Motor OverloadedPump is operating at Lower Manometric head Add backpressure Speed is too high Reduce pump speed Mechanical Friction inside Pump Check alignment. Replace bearings and bushings where required Bearings OverheatingInsufficient Lubrication, deterioration of grease or no grease Replace bearings, or regrease Bearing Covers Overtightened Remove cover and refit Insufficient Cooling Check pump operation at low level Excess Grease Remove Excess Grease VibrationUnbalanced Parts Remove parts and check Clogged Impeller Unclog impeller Impeller Worn Replace impeller Oblique Shaft Replace Shaft High Noise LevelFlow Rate too high / too low End of curve operation. Adjust to Best Efficiency Point (BEP) Water mixed with Air Stop operation of pump at low water level or increase tank contents or reduce operational speed Pump is working in cavitation area Correct system pressure, and pump speed

To learn more about Vertical Immersion Pumps, read our complete guide.