Referral service, not a contractor. Prevent Home Leaks does not perform plumbing, leak repair, or water damage restoration. We may be paid if you hire a provider through a partner link. Always confirm the provider's license and get a written estimate. How this works
High water pressure: a hidden cause of leaks
Pressure that's too high strains supply lines, valves, water heaters, and appliance hoses, and can shorten their lives. Plumbing codes commonly require a pressure-reducing valve (PRV) when street pressure exceeds 80 psi. Confirm local code with a licensed plumber.
Test it yourself
- Buy an inexpensive pressure gauge that threads onto a hose bib.
- With no water running in the house, screw it onto an outdoor spigot or the washer valve and open the valve fully.
- Read the static pressure. Check again at different times of day, since pressure is often higher overnight.
What the reading means
- Above 80 psi: talk to a plumber about installing or adjusting a PRV.
- A PRV that's already installed but readings are high may need adjusting or replacement.
- Sudden "water hammer" banging can point to pressure issues or a missing expansion tank on a closed system.
Pairs well with a meter leak test and checking your water heater.