Quote:
Originally Posted by btcshields6
Well, I looked into that, but unfortunately R68 in the Robot Rules prohibits using any other pressure switch besides the Nason pressure switch, P/N SM-2B-115R/443.
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The 115R in the part number means it should switch off at 115 PSI rising. If yours is switching off at 90 PSI rising, then it is out of spec. If it is new, it should be returned to be fixed. The other possibllility is your pressure gauge is reading low and the switch is working correctly.