Harris Hydraulic Shock / Water Hammer

Pump housing or plumbing vibrates and makes a water hammer or banging noise when the pump stops

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.

Possible Causes

Check valve slamming shut, Rapid pump shutoff at high speed, Air pockets in plumbing, Undersized or improperly placed check valves

Safety first: Ensure the system is depressurized before modifying plumbing.

Reduce shutdown speed: On Harris variable-speed pumps, program a ramp-down period before shutoff to reduce sudden flow stoppage.
Inspect check valves: Locate any check valves near the pump and ensure they are oriented correctly and not oversized or undersized.
Bleed air from system: Open air relief valves on the filter and high points in the plumbing to remove trapped air.

If water hammer persists, consider installing a water hammer arrestor or relocating check valves.

Medium 3/5

Pool system check valve (compatible with Harris pump)

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