Do I have the right pressure switch?

Old 09-05-16, 01:11 PM
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Do I have the right pressure switch?

For the second time in two weeks, we woke up this morning to no water pressure in the house. When it happened the first time, I went into the crawl space and tinkered around, and eventually when I was about to give up and was putting the cover back on the pressure switch, I heard a click and water rushed into the pressure tank. So, I figured the pressure switch had just been stuck.

This morning, same thing happened; I whacked on the pressure switch cover a couple of times, then heard a click and water rushing in, and figured the switch had just stuck again.

So I pulled off the cover and saw that it was a 30-50 switch, so bought a new one at my local big box store. Came home to prepare to install, and measured the pressure on my tank, and it's at 37 PSI...

After doing some research, I gather that 37 PSI is approximately where the pressure on the tank should be for a 40-60 pressure switch; but if the cover of my switch is to be trusted, I have a 30-50 switch installed.

The inline pressure gauge on the system is stuck at 50PSI; needle doesn't move up or down when using water or calling for water from the pump, so I figure it's just broken. It's no help in determining when the pressure switch is opening and closing.

The pressure switch really acts funny, too. While I was down there, the tank was full, nobody was using water, and the switch was clicking on and off intermittently, seemingly for no reason. Makes me wonder that the pump is still working if it's been doing this for long...

Tanks seems good. The "tap test" sounds hollow at the top and full of water at the bottom.

Here's my question: Is replacing the pressure switch the next reasonable step to take, and if so, is there any harm in going ahead and installing a 40-60 switch since that seems to be what the pressure tank is set for?

I live in a 2300 square foot ranch. Well comes in on the left side of the house, and I have a bathroom at the far right side of the house. Three bedrooms and a kitchen, family of four with reasonable water usage habits and no leaks that I can see.
Old 09-05-16, 01:58 PM
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Your pressure in the tank bladder with the tank empty should be 2 psi below the cut in pressure. Now, with the switch cycling, I can assume your tank is either waterlogged, the bladder is ruptured, or your cut in pressure is not as advertised on the cover. Set your switch to the pressure cut in that you want, then set the tank as described, the fire up the system. Let us know what happens.
Old 09-05-16, 02:40 PM
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It is imperative that you have a working gauge. Right now you're guessing at the problem.

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