I have a surflow water pump 40psi.I went to winterize it.I drained all the water from the water heater and bypassed it.I than drained the fresh water tank using the water pump and letting the water pu...
You are doing it wrong! Been there, done that. BEFORE turning on the water pump ... TURN OFF ALL FAUCETS...then turn the pump on and let the lines re-pressurize. When the pump turns off, THEN start opening faucets one at a time.
I know ... been there done that ... and learned by trail and error.
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