Adjusting Pressure Switch - Only one adjustment nut..

Discussion in 'Pumps and Tanks Well Forum & Blog' started by kokanegold, Mar 28, 2009.

  1. kokanegold

    kokanegold New Member

    Mar 28, 2009
    I think I have a Square D PumpTrol pressure switch.. That is what the cover says anyway. BUT there is only one adjustment nut on the switch. I've looked all over the internet and have not come across a switch similar to mine.
    A picture is attached, I'm guessing that this nut would adjust BOTH the cut-in and cut-out pressures at the same time??

    Currently the pump cuts in at about 50psi and cuts out at about 60psi. What I would like to do is keep the cut-out at 60psi but lower the cut-in pressure to about 40psi so that the pump doesn't need to kick in so often.
    Would there be a reason that it is set up right now with only 10psi differential?? Is it better for the pump to run for a longer period of time or kick on and off more often??


    Attached Files:

  2. cacher_chick

    cacher_chick Test, Don't Guess!

    Jan 5, 2008
    Test, Don't Guess!
    Land of Cheese
    There are about 100 different Square-D pumptrol switches, each slightly different. Yours does not have a differential adjustment.

    You could replace the switch with one that does.
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  4. speedbump

    speedbump New Member

    Jul 15, 2005
    Water well and pump tech.
    Riverview, Fl.
    You might want to replace your gauge also. I have never seen any squard d switch that you could get below a 17 lb differential with. I think your gauge is telling you a fib.

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