Yes, 90 PSI (pounds per square inch) water pressure is significantly too high for a residential plumbing system and violates standard building codes, which mandate that home water pressure must not exceed 80 PSI. Operating your home at 90 PSI places extreme, continuous mechanical stress on water heater tanks, appliance supply hoses, washing machine valves, and faucet cartridge seals, drastically increasing the risk of sudden pipe joint leaks or catastrophic indoor flooding. Verification: Attach a pressure test gauge to an outdoor spigot and adjust your pressure reducing valve until the needle drops to a safe 50 to 60 PSI range.
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