Pressure switch cut in 40 psi / 70 psi cut out??

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Matthew Embury

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Hi everyone, my tank pressure is 38 psi with a 40/60 switch. I have a 20 gallon tank and CSV valve set at 52 psi running a hose at 2 gallons per minute. I noticed tonight that the cut out isn't till 71 psi or so? Should I be concernd or????
 

Reach4

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Hi everyone, my tank pressure is 38 psi with a 40/60 switch. I have a 20 gallon tank and CSV valve set at 52 psi running a hose at 2 gallons per minute. I noticed tonight that the cut out isn't till 71 psi or so? Should I be concernd or????
Yes. The concern is that you are over-stretching the diaphragm.
Adjust the differential nut if you want to raise or lower the
cut-out setting while keeping the cut-in pressure constant. The
differential nut is the 3/8-inch nut that adjusts the smaller of
the two springs in Models FSG, FYG, FRG, and Type G switches. Turn
the differential nut clockwise to increase the cut-out pressure and
counter-clockwise to lower the cut-out pressure. Adjusting the
differential nut will change only the cut-out setting while the
cut-in setting remains unchanged.​
 
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