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Thread: VERY low water pressure but pump keeps running

  1. #1
    DIY Junior Member jhashey's Avatar
    Join Date
    Oct 2013
    New York

    Default VERY low water pressure but pump keeps running


    We just recently bought a house with a well and started having issues. The submersible pump is ALWAYS running but the water pressure only gets to 18.

    I did follow the instructions on the sticky and replace the pressure switch as well as the gauge. The problem still exists. We have the pressure tank and the water filter left to tinker with, but I wanted to ask advice before I start switching things out.

    What are some possible causes for constant pump running and very low pressure?

    Thank you!!!!

    PS. Since we just moved in, I'll answer these as best as possible.

    Type of pump?

    Size of Pump?
    Motor Horsepower?__________
    Pump Model #______________
    Date Pump Installed__________

    Pumping from?

    Water Well
    Depth of well__________
    Depth to water_________

    Drop Pipe Material

    Steel_______ Pretty sure it is steel

    Well Recovery Rate_______gpm
    Well Casing Diameter_______
    Rock Well__________ Sand Well__________ Other______________
    Date Well Drilled____________

    Well Casing Material
    PVC________ Steel_________ Other_________

    Pressure Tank?
    Bladder or diaphragm tank (one pipe to tank) Yes..
    Size or model of tank Around 25-30 gallons

    Pressure Switch Setting?
    On 30, off 50

    Filters or Softeners______________
    after pressure tank
    Type of filter whirlpool
    Bypass available YES but doesn't seem to work

    Water Used For?
    House Use YES Number of baths 2 Number of People 3

    Problems Experienced

    Air in water - There has been some air in the water, but only after I did a filter change briefly them briefly after the pressure switch was changed

    water pressure doesn't exceed 20.

    Do you have, and know how to use
    an Ampmeter and Voltmeter__________________

    Describe Problem__________________________ (Above)

  2. #2
    DIY Senior Member Reach4's Avatar
    Join Date
    Sep 2013


    It's not the filter.

    I expect it is one of these:
    1. pump is bad.
    2. the well is running dry. Test for that by turning off the pump for a few hours. See if pressure is a lot higher when you first turn the pump back on.
    3. there is a leak in the connection to the pump, which may be down-hole.
    4. Something is draining a lot of water up top. Close valves to isolate. (least likely, since you would probably have noticed)

    Look for obvious stuff, but expect to call a well company. Ask your neighbors for advice. They will probably know the local reputations.

    non-expert, non-pro.

  3. #3
    Test, Don't Guess! cacher_chick's Avatar
    Join Date
    Jan 2008
    Land of Cheese


    My vote is for a hole/leak in the drop pipe going down into the well.

  4. #4
    DIY Junior Member Joe Enger's Avatar
    Join Date
    Oct 2013
    New York


    Definitely sounds like a bad leak.. Go back and look through your electric bills, I bet they were higher than usual.

    Do you notice any wet spots in your yard? The leak is either from your house, to the well. OR from the pitless down to the pump. If your pump is on poly pipe then I would guess the leak would be from the well to the house (9 time out of 10 its the fitting off the pitless)

    If it isnt a leak, then the impellers on the pump are shot, and you should replace the pump.

    EDIT: I just saw that you posted your pump is on galvanized steel pipe. I would say the pipe is leaking on the couplings. Very dangerous on gal, ive lost pumps from couplings becoming so weak. Call in a professional, your going to need a derrick truck or an upzdazy machine at the very lest.

  5. #5
    DIY Senior Member craigpump's Avatar
    Join Date
    Apr 2012


    Up z Dazy with steel pipe?

    You're a brave soul!

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