Question about Flotec Corrosion Resistant Shallow Well Jet Pump 1/2HP, 8GPM

1 Answer

Pump cycles like crazy!!

Hi there, i have a 3/4 hp jet pump at my cottage..drawing water from the lake, it cycle on and off very quickly...twice a second perhaps!
I've adjusted the electrical switch either direction, and the pressure in the tank..with no effect. There is a brass adjustment on the pump itself and it finally stops cycling if i turn it all the way in!! I'm thinking this isn't the real "fix"! Could it be the fact that the lake, although only 15-20ft about 200ft from the pump!?
I fill the suction line and the prime the pump so it has never been dry. It pumps water, but cycles like crazy! At any pressure i set it at...30.40 60.
It seems to be okay if i turn that brass adjuster all the way in...can i leave it in? I don't wanna screw up a pump or overlook an obvious problem.
PS everything is brand new..pump,tank,lines,filters,foot valve..with no change.

thanks very much

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  • Randy Marshall May 13, 2010

    Watch your pressure gauge the brass screw may be a flow rate control? How many gpm will it pump , it should have a tag on pump itself.

  • olfartca1 May 13, 2010

    sadly i'm not at the cottage now, so i can't tell you how many gpm...but it seems like A LOT! When the screw is all the way in and the pump is pumping....there is a ton of volume!



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Sometimes a new tank the blatter will be kinda sealed to the sides of the tank.the amount of air in the tank s/b equal to the cut in pressure of the pressure switch.(40 lb) that would be (60 lb) cut out if you messed with the little screw on the pressure switch you have a problem.there must be the 20 psi of differance between start and stop.

Posted on May 17, 2010


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