Yes, 140 PSI (pounds per square inch) water pressure is dangerously, excessively high for a residential plumbing system and poses an immediate risk of catastrophic failure. Standard plumbing codes mandate that home water pressure must not exceed 80 PSI. Operating at 140 PSI places extreme, destructive mechanical stress on water heater tanks, washing machine hoses, toilet fill valves, and plumbing joints, making major pipe bursts and indoor flooding highly probable. Verification: Screw a pressure test gauge onto an outdoor spigot and immediately adjust your pressure reducing valve downward toward 50 to 60 PSI.
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