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FicusTheVegeton

11:28AM | 01/06/05
Member Since: 01/05/05
2 lifetime posts
Bvplumbing
I installed a Pumptrol FSG2J21 pressure switch on my well pump and successfully adjusted the CutIn pressure to 40 pounds and the CutOut pressure at 60 pounds. My holding tank pressure is at 38 pounds.

Here's the problem: When it reaches 60 pounds and shuts off, there is a quick decrease in pressure from 60 pounds to 56 1/2 pounds on my pressure guage. No water is running in the house and it "holds" at 56 pounds until someone uses water.

What is happening please? And how can I fix it? Thank you.

cellarwater

07:20PM | 01/06/05
Member Since: 12/09/03
175 lifetime posts
That 4 pound loss is the water loss until the check valve shuts in the pump. Try setting the cutoff for 64-65 pounds to acheive the 60 pounds that you're looking for. C.

FicusTheVegeton

03:31AM | 01/07/05
Member Since: 01/05/05
2 lifetime posts
Thanks for the quick response.

I'll increase the CutOff pressure a pound or two and see if there are resultant changes in the pressure that it actually holds.

One concern I have about boosting the CutOff pressure to 65 lbs is that I believe 65 lbs is the maximum upper limit for a Pumptrol FSG2J21.

Also, the pump is only a year old and this CutOff pressure drop was not happening until I replaced the Pumptrol (pressure switch).

Could the CutOff pressure drop be caused by air having infiltrated around the bladder of the pressure tank?

Sorry to be a pest, but you are dealing with a totally amateur plumber that gets paranoid when unexplained happenings occur. :)

LonnythePlumber

05:53AM | 01/07/05
While cellar is probably right about the settling in relation to the check valve, I look first to the gauge with your symptoms. You probably don't have a glycerin (sp?) gauge and the needle settles or the air hasn't mixed into the water yet at the gauge.

I haven't noticed immediate pressure drops on the wells I observe as being normal and related to the check valves but could be.
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