Install water hammer arrestors at the washer valves

Washer inlet valves close fast, and the pressure shock can bang the pipes. Screw-on arrestors fit between the washer box valves and the fill hoses and absorb that shock. Also check the house static pressure: if it is high, a pressure-reducing valve may be needed, because arrestors alone do not fix high pressure.

Cross-checked ~30 min easyBrands: All

Before you start

  • Close both washer valves and unplug the washer before disconnecting hoses.
  • Hoses contain water under pressure until the valves are closed; open them slowly afterwards.

Diagnostic steps

Unlock all 8 steps with expected values

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Install water hammer arrestors at the washer valves · OnCall Tech