my pump hesitates

Discussion in 'Pumps and Tanks Well Forum & Blog' started by Allyn, Dec 29, 2004.

  1. Allyn

    Allyn New Member

    Messages:
    1
    I have a shallow well, with a Gould pump. Lately, when I open a faucet, I have to wait up to 5 or 10 seconds for the water to start pumping. The pump itself, once the faucet is opened, goes down to 0 pressure, hangs there 5 or 10 seconds, then the pressure goes up to normal and I get water. What should I check first?
  2. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    22,139
    Location:
    New England
    I guess I sound like a broken record...check your pressure tank. It should sound hollow on one end, and make a duller thud on the other end. It is supposed to have air in one side.

    It sound like it is shot. The pump runs until it reaches the high shut off point. Normally, in that process, it is not only replenishing the water that you used, but also compressing the air in the tank. Once it reaches the high point, the pump turns off. The air bladder then pushes the water from the tank to your faucet rather than the pump until the pressure drops to the turn on point, and the pump starts again. If there is no air in the tank, the water doesn't compress the air bladder, and the system reaches the high shut off point by expanding the pipes a tiny fraction. Since there is no air in the bladder, there is nothing to push the water out and what little expansion of the piping system there was creating the pressure, is relieved. YOu might get a small dribble out, but not much.

    So, rap on the tank. If it sounds the same at both ends, shut off the pump, open a faucet, then use a tire pressure guage to check the pressure in the tank. You might get some water out, but probably not. It should be 1-2 pounds less than the low turn-on point of your well system. If it doesn't hold air pressure, that's your problem.
  3. Gary Slusser

    Gary Slusser That's all folks!

    Your pressure switch is lagging. It isn't sensing the pressure as it changes. The usual cause is a blockage of the switch nipple with a submersible pump and the tubing, its fittings and the holes they screw into on a jet pump.

    Gary
    Quality Water Associates
    Last edited: Dec 30, 2004
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