Help with well pump issue

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  #1  
Old 10-11-19, 06:52 PM
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Help with well pump issue

Hey guys I've been having an issue with my well. I have an above ground 1HP jet pump with 2 pipes connecting it to the well. From what I understand that means that I have a deep well.
My issue is that after I run 20+ gallons of water at a time my well pump cannot get the pressure high enough to reach the cutoff on the pressure switch. The thing would run all night if I let it so I've been having to kill the breaker when it does this and wait hours to turn it back on. Strangest part is that my pump never sucks air into the tank. When the pump works correctly it gets the pressure back up fairly quick.
I already replaced the pressure switch and adjusted it to a 30/40 configuration. Because 40psi is the absolute highest pressure that my pump can produce (even if I manually close the pressure switch it cannot go above 40). I have kept an eye on the pressure gauge when I have the pump turned off at night and the pressure does not decrease over time which tells me that there is probably not a leak in the pipe to the well.
The issue seems to be worse at night also...
I checked the pressure in the water tank bladder as well and it is right at 29psi which sounds correct from what I have researched.
I am an electrician so I am fairly handy but now this is just way over my head. Does anyone have any suggestions as to what could be causing this? Thanks so much in advance!
 

Last edited by Sgd0072; 10-11-19 at 06:56 PM. Reason: Revision
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  #2  
Old 10-12-19, 06:31 AM
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Best guess would be worn seals in the pump permitting some bypass and losing the pressure.
 
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Old 10-12-19, 06:35 AM
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One problem could be the well running dry. Another possibility is the venturi down on the foot valve has some debris clogging it.
 
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Old 10-12-19, 06:36 AM
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We have an above ground, too, but a 2 pump system. Well pump fills an aeration tank and house pump uses that supply to pressurize house. Not too long ago I had noticed the house pump running excessively long before reaching cutoff (ours is 30/50). It would get close and then run a few extra minutes to get the last couple of PSI built up to cutoff. Replaced the pump and problem solved. The pump portion CAN be rebuilt (I saved the one I replaced and will rebuild it as a spare) but replacement is much quicker.

You didn't mention the make/model of pump and how old it is, but I can't imagine a 1hp pump couldn't make 40 psi pretty quick (ours are 1/2 hp for both pumps) unless it has to do with the inlet side water supply. Maybe one of the water pros can chime in with more insight.
 
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Old 10-12-19, 06:39 AM
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PD, you got in while I was typing. The direct well-to-house with 1 pump setup would have different issues than my setup; drawing water from the aeration tank on mine there would never be those issues.
 
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Old 10-12-19, 07:04 AM
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Awesome thanks for the replies. So it's looking like I'll probably just replace the pump. My current pump is an older tractor supply cl100. https://www.tractorsupply.com/tsc/product/countyline-convertible-cast-iron-jet-pump-1-hp
 
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Old 10-12-19, 12:36 PM
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As PB pointed out, could be something on the supply side causing a water deficit. On the other hand, if the pump has some mileage on it, wouldn't hurt to have a new one anyway.
 
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