I have a Pumptrol FSG2J20M4CP 20-40 PSI switch. My pump will not pump to 40 PSI. I've backed off the differential nut all the way off the spring. The pump will not shut off on it's own. Will this switch not cut off lower than 40 PSI ? Or just needs replaced?

Sounds like the points are stuck. Turn off the power and use a screwdriver to push them apart. You might be able to file them, but I'd just replace the switch. Cheap and easy.



Of course it is possible that you have next to no pressure. What does your gauge read?

I will give it a shot. I know it's an older system just hope the well is not drying up on us.

Of course it is possible that you have next to no pressure. What does your gauge read?

I'm getting up to 36 # & it won't go any higher. Have lived here since 1973-74, system has never had great pressure.

It seems you have two problems. The pump cannot get up to 40#, which certainly could be due to the water table dropping, and a switch which will not turn off even though you have backed the large, center nut all the way out until it is off the spring. The second problem is the one I have referred to. As to the first problem, that could be a pump issue. How many pipes go into your well, one or two?

It is a deep well with 2 pipes. But in a way I've never seen before. It's 1 pipe inside the other pipe. It's been awhile since I had that part so I can't recall the pipe sizes, But the larger is about 2 1/2 ". Most deep well I've seen pipes were side by side.

It seems you have two problems. The pump cannot get up to 40#, which certainly could be due to the water table dropping, and a switch which will not turn off even though you have backed the large, center nut all the way out until it is off the spring. The second problem is the one I have referred to. As to the first problem, that could be a pump issue. How many pipes go into your well, one or two?

Good news ! The points were a little rough looking. I had already bought a new switch but was just second guessing the problem. Replaced switch did a little tweeking before turning on the power. Almost right on, tweek a bit more & cycles as it should. Thank you for your help.

Now the question is this: Will the pump get up to 40#?

I am assuming, from your description, that only one pipe from the well hooks up to the pump. Is that correct?

Now the question is this: Will the pump get up to 40#?

I am assuming, from your description, that only one pipe from the well hooks up to the pump. Is that correct?

I already know it will not reach 40 #. That's the way this system has always been. I do know the pump more than 7 years old, the impeller may be an issue if the "newer parts" are made from cheaper softer materials.The venturi screws onto the inside pipe with a rubber gasket seal around the outer pipe. I do understand that it forces water down to help pull the water up. After tweeking the new switch I do have it running as it should... for now.

Depth to water might be a factor. Assuming it holds prime, so there is probably not a pipe leak issue. Wouldn't hurt to put new parts in the impeller.

The business of trying to get a jet pump to get up to higher pressures is one of the commonly asked well questions on this board. It's a tough issue. 1Speedbump is new here but seems to have a lot of well experience. He might be able to give you a little better advice.

Depth to water might be a factor. Assuming it holds prime, so there is probably not a pipe leak issue. Wouldn't hurt to put new parts in the impeller.

The business of trying to get a jet pump to get up to higher pressures is one of the commonly asked well questions on this board. It's a tough issue. 1Speedbump is new here but seems to have a lot of well experience. He might be able to give you a little better advice.

This was my parents house since the mid 70's. It wasn't that old when they moved in. It's always had low pressure issues. I did replace the pump about 8 years ago. & this summer the pressure tank as the old one sprung a leak. But for the time being we no longer have to turn the pump off by hand.