Explains the usual causes of your fresh tank overflowing or just filling by itself while hooked up to city water. Provides information on how to determine the failing component and what to do to fix the problem.
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Fresh Tank Fills by Itself 1.2
- Author danemayer
- Creation date
After you close the faucet, the pump runs just long enough to build pressure and activate the pump's pressure switch so it stops pumping.
The pressurized water leaks back through the pump reducing the pressure.
The pump pressure switch detects the loss of pressure and starts the pump, which runs long enough to rebuild pressure.
Depending on the amount of backward flow the pump is allowing, your pump may run quite intermittently, or quite frequently.
Putting the check valve on the supply side eliminates this problem.