How to Tell If Your Water Pressure Is Too High or Too Low

Water pressure that's too high stresses your pipes and appliances, while pressure that's too low makes everyday tasks frustrating. Knowing your numbers helps you protect your plumbing.

Signs of High Pressure

• Banging or knocking pipes (water hammer)
• Faucets that splash hard
• Running toilets and short appliance lifespans
• Leaks that keep appearing

Signs of Low Pressure

• Weak shower streams
• Slow-filling toilets and tubs
• Appliances that take forever to fill

How to Check It

Attach an inexpensive pressure gauge to an outdoor spigot or laundry faucet. Healthy home pressure sits between 40 and 60 psi. Anything above 80 psi is too high and can damage your system.

The Fix

High pressure usually calls for a pressure-reducing valve. Low pressure can stem from clogged lines, a failing valve, or municipal supply issues. A plumber can diagnose the cause and get your pressure back in the safe range.