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How to Check Circulation Pump
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- Turn on the pump and check that it is running – listen for operation and feel for vibration.
- Open hot water faucets at the furthest fixture and measure time for hot water arrival. Should be significantly faster than without the pump.
- Check that the pump turns off a short time after closing faucets. Continuous running indicates a problem.
- Test any pump activation controls like temperature sensors, timers, or motion sensors. Make sure pump responds properly.
- Monitor the pump’s outlet temperature. Should be at least 110°F if supplying adequate hot water circulation.
- Measure the pump’s discharge water flow if able. Compare to manufacturer specs for design flow rate to ensure proper operation.
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