PUMP built in pressure shut off switch

Discussion in 'Irrigation / Sprinkler Forum' started by Norm waite, Jul 9, 2006.

  1. Norm waite

    Norm waite New Member

    Messages:
    1
    :cool: Who , if any , manufactures a irrigation sprinkler system pump with a build in Pressure shut off switch to shut pump off when all well valves are closed and pump is running hot from pumping against its self.
    Thanks
    Norm
  2. Bob NH

    Bob NH In the Trades

    Messages:
    3,317
    Location:
    New Hampshire
    The equipment exists, but it requires more than a pump and switch.

    There are controllers that will shut off a pump from a no-flow condition, but they often require a manual reset condition.

    What you suggest doens't work by itself because the pressure drops off when the pump shuts off and the pump starts again, creating a nasty cycling condition. The solution is to put a small pressure tank after the pump, and a check valve on the suction side of the pump. When the valves close, the pressure increases and the switch shuts off the pump.

    Another solution, if you have electric valves, is to use the irrigation controller to operate the pump. When a valve is opened, the controller closes a relay to start the pump.

    If your controller doesn't do that, you can put a relay on each valve circuit so that applying power to open any of the valves will start the pump.
  3. speedbump

    speedbump Previous member

    Messages:
    4,540
    Location:
    Riverview, Fl.
    And if your using a centrifugal which works terrible with a pressure switch and tank, you can install a Hot Stop Thermostat to keep from nuking your pumps impeller and all your PVC fittings attached to the pump. It will turn the pump off at 110° and back on at 90°.

    bob...
  4. Lawnmower Man

    Lawnmower Man New Member

    Messages:
    1
    A good manufacturer

    Hi!

    I think that you could find these products interesting. I don't know if they have this product you are asking for, but maybe they have some different options to help you.

    www.plasgotirrigation.com


  5. Overheatprotection

    Overheatprotection New Member

    Messages:
    3
    Location:
    port richey,fl.
    Norm,
    I just thought you would like to know that the Pump Overheat Protection Switch is the best choice.
    Go to overheatprotection.com and see what it is all about. Easy to install.
    Johnhttp://www.overheatprotection.com
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