Quote:
Originally Posted by andrewwynn
50 is the magic number. If you FPR comes off like mine did you might find a leaky o-ring that vented the pressure back to the tank.
When check valve holding you should have 20-30 psi overnight but the FPR o-ring also must seal.
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Sounds good, thanks Andrew. But where is the FPR on the smaller (older, I think) filters like in the picture above? It isn’t a separate part, so is it part of the pump?