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Author:
billteale (NC)
Just changed the pressure switch on my deep well pump. The pump is sitting between (and providing water for) my house (below well) and another trailer, situated 50 yards up an incline.
The switch is a 40/60 and I haven't turned either of the screws on the switch. The tank has 38psi, and is a pretty new tank with no signs of wear.
The pressure switch works perfectly as it should. It turns the pump on just below the 40 mark, and turns it off around the 60psi mark, according to the (new) pressure gauge I installed this weekend along with the switch.
The problem is that when the pump comes back on there is an immediate loss of pressure for an instant - the gauge goes down to zero. The pump continues to pump, and the pressure comes back up steadily, but of course the flow in the houses is affected for a few brief seconds.
This happens every time the switch turns the pump back on.
Does anybody have any ideas what might be causing it?
Thanks!
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Author:
hj (AZ)
Regardless of what the gauges say, the pressure in the tank is too high. Before the actual pressure reaches 40 psi to turn the pump on, the higher pressure in the tank has forced all the water out, so you have a moment between the tank running out of water and the pump turning on when there is no pressure. Reduce the tank pressure. There is really no detriment for the tank pressure being more than 2 psi below the switch pressure.
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Author:
North Carolina Plumber (NC)
Correct, either lower the air pressure in the tank a few pounds, or increase the cut in- off setting on the switch a few pounds.
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Author:
billteale (NC)
Thank you to both of you who responded, it worked perfectly! I was so worried it was something serious!
Edited 1 times.
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Author:
billteale (NC)
Actually, as an addition to this, it did work for a day or so, but then the same issue came back, so I got a professional out, who believes it is either a worn out pump or a leaking well. He is going to pull the pump out of the well to take a look.
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