Key points
- Many homes have a pressure reducing valve (PRV) near the main shut-off.
- PRVs wear out — pressure can creep up without you noticing.
- High pressure strains supply lines, fittings, water heaters, and appliances.
- A cheap hose-bib gauge shows your pressure in seconds.
Signs pressure may be too high
- Banging or hammering pipes
- Toilets that run or refill on their own
- Dripping faucets and failing supply lines
- Water heater relief valve dripping
- Appliance hoses bursting
How to check
- Buy a pressure gauge that screws onto an outdoor faucet.
- Test with no water running inside.
- If it reads high, have a plumber check or replace the PRV.
Many plumbers suggest keeping household pressure in a moderate range — ask yours for a target. Pair it with an expansion tank on the water heater — see expansion tanks.
Leak already happened?
Call (385) 250-2825 — answered live 24/7 by the Vault crew.