Water pressure cutting out.

[jmitch86]

Over the past few weeks when I turn on any faucet in my home the water will run for a few moments and the completely shut off, it then comes back to full pressure and runs like normal. The issue only happens if the water has not been used for a few hours. The house is supplied by a well with a submersible pump and I recently changed the pressure tanks, switch and pressure gauge. Anyone have any ideas?

 

[Reach4]

Comes back to full pressure after how long? 300 milliseconds, 3 seconds, what?
1. The pressure switch could be sticky in some other way. In that case no power is sent to the pump. You could put a voltmeter across terminals 1 and 4 to see if the pressure switch is sending power.
2. The pump could be sometimes slow to start after the power gets sent from the pressure switch. One way that can happen is that the start capacitor in the control box is weak.

Not everybody has a control box. Control boxes have a non-polarized electrolytic start capacitor. Those will go bad with time and starts.

Some just replace the control box, and that way they get new start capacitor and new relay, and more.

 

[Sponsor]

 

[jmitch86]

It usually returns to full pressure within just a couple of seconds.

 

[Valveman]

Remove the check valve you installed at the tank(s). Sounds like the check valve on the pump is leaking back. Removing the above ground check valve may make the one on the pump hold. But if you loose pressure even when no taps are open, the check valve on the pump will need to be replaced.

BTW, cycling on and off is what causes the failure of check valves, tank bladders, and most expensively the pump.

 

[Bannerman]

What pressure setting is your new pressure switch calibrated for?

What was the air pre-charge air pressure in your new pressure tank(s?) while the tank(s) contained 0 water?

 

[jmitch86]

What pressure setting is your new pressure switch calibrated for?

What was the air pre-charge air pressure in your new pressure tank(s?) while the tank(s) contained 0 water?

The switch was a 30/50 and I checked the tanks with no water and set them at two psi below the cut on pressure. 28psi.