What is going on
City water pressure can be high, especially in lower-lying neighborhoods or near pumping stations. A pressure reducing valve near the main shutoff knocks that down to a safe level. Over time the internal diaphragm and spring wear out. When the regulator fails open, pressure climbs: you get banging pipes, running toilets, dripping relief valves, and faster wear on every fixture and appliance. When it fails closed, pressure drops and showers go weak.
What we check
- 01
Static pressure
Gauge on a hose bib to read house pressure with nothing running.
- 02
Pressure under flow
How pressure behaves when fixtures are open.
- 03
Regulator age and type
Location, size and condition of the existing valve.
- 04
Thermal expansion
Whether an expansion tank is present and working.
- 05
Shutoff valves
Main valve tested so the replacement can be isolated.
Your options
Regulator replacement
Failed valve swapped and set to proper pressure.
Regulator plus expansion tank
Closed system that needs room for heated water to expand.
New regulator install
Home with high incoming pressure and no regulator at all.
Before we get there
If you have a hose bib gauge, check your pressure and tell us the number. Note any symptoms: banging pipes, a dripping relief valve, running toilets or weak showers. Find the regulator, usually near where the main line enters the house.