I have a cabin with a jet pump located in the basement. It's a
shallow well, so that's all that is needed. I came there one day and
found the pump was running continuously. Could have been running for
several days because no one had been there. There was also poor water
pressure. I checked the electrical contacts on the pressure switch
and all of that was working. All of a sudden I got the idea that the
pressure switch was jammed. I hit it with a piece of wood and the
pump stopped and there was pressure again. Apparently there was a
chunk of rust stuck in it. It's been fine ever since. In fact I
planned to take it off and clean it out, but since everything is
working, I didn't do anymore.
A neighbor told me that the reason that happened is because I have the
check valve mounted almost horizonally. It's located in the pipe
where it enters the basement wall from the well, and right before the
pump. It is almost horizontal, just slightly off horizontal because
the pipe slopes down a little toward the entry point in the wall, and
the pump is a little higher.
While what he said does make a little sense, (saying nothing can get
stuck on there then), I dont really know if it matters all that much,
because it's been that way for over 20 years and never jammed up
before. However, in the past I kept the house heated in winter, and
this year because of the price of fuel. I drained all the water and
this happened shortly after turning it on again. So, I could see
where chunks of rust broke loose.
Anyhow, is there any "rule" about the position of them? He's not a
plumber, so it might just be rumor, but I thought I'd ask.