Why is my well pump pressure tank losing pressure when not using water?

Discussion in 'Pumps and Tanks Well Forum & Blog. Water is life.' started by mick04u, Aug 30, 2019.

  1. mick04u

    mick04u New Member

    Joined:
    May 22, 2005
    Location:
    Virginia
    I recently had a well and irrigation installed. My well depth is 75’ and I have a 1 H.P. Sta-Rite deep well jet pump (SLE-L) and a 2 gallon pressure tank. The pressure is set to cycle on at 40 and off at 60 psi. I’ve noticed that the pressure drops when I’m not running water. It drops about 5 psi every 2 hours. The pump kicks on for a few seconds once it gets below 40 psi.
    Is it normal for the pressure tank to lose pressure when not in use? I would assume there’s a leak somewhere in the pipes to cause the pressure to drop, but the company that installed my irrigation said it’s normal for a deep well pump to cycle 1-2 times every 24 hours to maintain pressure. Is this true? If not, what else could be causing it other than a leak in the pipes?
     
  2. Reach4

    Reach4 Well-Known Member

    Joined:
    Sep 25, 2013
    Location:
    IL
    Close the valve between the pressure tank and the irrigation. If that stops the pressure drop, the leak is toward the irrigation load. If not, the leak is the foot valve down the well below the jet (more probable) or a water leak in a pipe on the way.
    [​IMG]
     
    Last edited: Aug 31, 2019
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  4. mick04u

    mick04u New Member

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    So it’s not normal for the psi to drop at all on a deep well?
     
  5. LLigetfa

    LLigetfa DIYer, not in the trades

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    Retired
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    Not normal provided the pressure is stored in a pressure tank. On a tankless system, it would only require a teaspoon of water to leak out to lose pressure.
     
  6. valveman

    valveman Cary Austin Staff Member

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    Mar 15, 2006
    Occupation:
    Pump Controls Technician
    Location:
    Lubbock, Texas
    With a 2.2 gallon tank you will have to leaf about 1/2 gallon before the pump comes on. And no the pressure should not leak down unless you use water. And no it is not normal for a pump to come on once or twice a day to keep the pressure up.
     
  7. mick04u

    mick04u New Member

    Joined:
    May 22, 2005
    Location:
    Virginia
    8F54EA0A-99E1-4469-AF41-6D7FCF931494.jpeg I have a deep well / single pipe system. I closed the valve between the pressure tank and the irrigation load and it continued to drop. The irrigation installer said it’s normal for some water leakage through the cup leathers and I shouldn’t be concerned with it cycling once every 24 hours.
    Should I be concerned with that little pressure loss or is it okay as long as it doesn’t get worse?
     
  8. Reach4

    Reach4 Well-Known Member

    Joined:
    Sep 25, 2013
    Location:
    IL
    I would say 24 hours is plenty OK. I am not a pro.
     
  9. mick04u

    mick04u New Member

    Joined:
    May 22, 2005
    Location:
    Virginia
    It’s actually losing about 2-3 psi every 2 hours, so it cycles twice every 24 hours. Is it an easy task for the irrigation installer to remove the foot valve and reseat? He keeps saying it’s normal for the cup leathers to leak slightly, so he doesn’t seem to want to do it.
     
  10. Reach4

    Reach4 Well-Known Member

    Joined:
    Sep 25, 2013
    Location:
    IL
    Suppose that would cost $600? Easy enough for you? The landscape person may call in a well person to do that.

    My guess could be off either way. I am not a pro.

    Is the well buried under the rocks, or is it in a more-accessible spot?
     
    Last edited: Sep 12, 2019 at 10:54 AM
  11. valveman

    valveman Cary Austin Staff Member

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    Occupation:
    Pump Controls Technician
    Location:
    Lubbock, Texas
    Cycling the pump a couple times a day isn't going to hurt anything. But a leak will usually get worse. Sometimes it is where the leathers are seated that is the problem. Raising them up or down a little will put them in a different place in the pipe where they may seal better. When the leak gets worse the number of cycles will get worse as well.
     
  12. mick04u

    mick04u New Member

    Joined:
    May 22, 2005
    Location:
    Virginia
    It’s in a more accessible spot....in the middle of the yard.
     
  13. mick04u

    mick04u New Member

    Joined:
    May 22, 2005
    Location:
    Virginia
    The irrigation installer said he will pull out the packer and inspect/replace it.
     
    valveman likes this.
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