Well pump runs but no pressure

Discussion in 'Pumps and Tanks Well Forum & Blog. Water is life.' started by KnoxMan, Jan 13, 2019.

  1. KnoxMan

    KnoxMan New Member

    Joined:
    Jan 13, 2019
    Location:
    Ontario
    I've learned a lot from this forum but can't find an answer to my problem.

    Submersible well pump won't build pressure at all after a low-pressure cut-out event this morning. When I hold switch to reset position, pump draws 5amps but does not build pressure.

    The water pressure system with 8.5gal tank and CSV set to 40-65psi was working normally since we moved in two months ago, except for occasional low-pressure cut-out events which I attributed to slow pump startup and the low draw-down volume in our pressure tank (which is set 2-3psi below cut-in pressure).

    Could a stuck closed CSV1A cause this issue? Or does this point to capacitor failure, or perhaps a stuck closed check valve in the pump. I don't think the well could be dry, but I should drop a line and check static level to confirm.

    BACKGROUND: I believe this is a 2001 drilled well with 1/2HP pump set at 140' in a 180' deep well with static water level of 60'. The capacitor is with the pump as it was setup to run off a generator cord originally. Fall 2017 I setup a pitless adapter and trenched 500' downhill (~15' drop) to our new house.

    Thanks for any tips.

    KnoxMan
     
  2. valveman

    valveman Cary Austin Staff Member

    Joined:
    Mar 15, 2006
    Occupation:
    Pump Controls Technician
    Location:
    Lubbock, Texas
    No a CSV cannot stick closed and cause that problem. A 1/2HP pulling 5 amps tells me the pump should be pumping a lot of water. I am afraid you have a hole in the pipe somewhere. When no one is using any water or with the ball valve to the house closed, when you turn off power to the pump the pressure should stay where it is. If the pressure falls off when no one is using water, there is a hole in the pipe somewhere.
     
  3. Sponsor

    Sponsor Paid Advertisement

     
  4. Reach4

    Reach4 Well-Known Member

    Joined:
    Sep 25, 2013
    Location:
    IL
    I would be thinking to set the pressure switch to 40/60 and the precharge to 36 in the face of the cutouts. Or 35...

    When you turn on the tub water full blast, do you see a quick dip on the pressure gauge as the pump turns on?

    7 gpm pump?

    You have 3-wire pump. A 3-wire pump is easier to run from a generator. Your suspicion that the start capacitor is getting weak has merit, given the sporadic tripping, except that the capacitor is pretty new. Most people don't have a low pressure cutoff pressure switch.
     
    Last edited: Jan 14, 2019
  5. KnoxMan

    KnoxMan New Member

    Joined:
    Jan 13, 2019
    Location:
    Ontario
    Thanks for the help guys.

    @cary: you were correct; a pvc double barbed coupling 20' below the pitless adapter blew apart. We put it back together with double hose clamps, and may replace the drop pipe with a single length of poly. I guess the previous owner ran the well dry and lowered the pump 25' to 165' hence the splice in the poly pipe and pull rope at that point.

    @Reach4: just tested and the pressure didn't dip when the pump cut in. I had about 38psi in the preset and set it down to 36psi. the pump seems to deliver about 5 gallons per minute. I guess we may exceed that flow rate with multiple faucets in use... ... ...perhaps flow restriction downstream of the pressure tank could prevent this possibility. We ran the well dry once or twice filling large tanks, hence the low-pressure cut out switch.
     
  6. Reach4

    Reach4 Well-Known Member

    Joined:
    Sep 25, 2013
    Location:
    IL
    Have you run the well dry since, and had the low pressure cutoff shut you down then?
     
  7. KnoxMan

    KnoxMan New Member

    Joined:
    Jan 13, 2019
    Location:
    Ontario
    No, low pressure has cut out for other reasons (undersized pump?), but we haven't run dry since Sept/18 (last tank fill) during routine household usage.
     
  8. LLigetfa

    LLigetfa DIYer, not in the trades

    Joined:
    Feb 6, 2011
    Occupation:
    Retired
    Location:
    NW Ontario, Canada
  9. KnoxMan

    KnoxMan New Member

    Joined:
    Jan 13, 2019
    Location:
    Ontario
    water gave out last night at 8pm; tried to reset pressure switch but not building pressure.

    panic! splice blew again!??

    then gurgle, gurgle in in the pipes and pressure started to build

    we must have hit the air bubble introduced at the splice 500' of 1.25" poly and 32 gallons and 16 hours later.

    all is well now ... no pun intended.

    -ryan
     
Similar Threads: pump runs
Forum Title Date
Pumps and Tanks Well Forum & Blog. Water is life. Shallow well Jet pump runs continuously May 8, 2019
Pumps and Tanks Well Forum & Blog. Water is life. Bypass pressure switch pump runs. Don't bypass pump wont run. 3rd new switch Jul 22, 2018
Pumps and Tanks Well Forum & Blog. Water is life. Well Pump runs every 1.5 hours. Should I install extra check valve? Apr 9, 2018
Pumps and Tanks Well Forum & Blog. Water is life. Pump runs continuously while water is on. Mar 18, 2017
Pumps and Tanks Well Forum & Blog. Water is life. Submersible pump does come on and runs until pressure gauge reads 70. Aug 8, 2016

Share This Page