Knowing where your main water shut-off valve is — and how to use it — can prevent thousands of dollars in water damage during a plumbing emergency. This is the single most important thing every Santa Rosa homeowner should know.
Where Is My Main Shut-Off Valve?
In most Santa Rosa and Sonoma County homes, you’ll find the main shut-off valve in one of these locations:
- Near the water meter — usually at the curb in a concrete box. Use a meter key or large pliers.
- Where the main supply enters the house — often in the garage, under a sink, or in a utility closet
- In the basement or crawlspace — on the main supply pipe near where it enters the foundation
How to Shut Off the Water
- Locate the valve (find it now, before an emergency)
- Gate valve (round handle): turn clockwise (right) until it stops — may take multiple turns
- Ball valve (lever handle): turn 90 degrees so the handle is perpendicular to the pipe
- Turn on any faucet to confirm water has stopped flowing
- Call us at (707) 584-0714
Individual Fixture Shut-Offs
For leaks at a specific fixture (toilet, sink, water heater), look for the individual shut-off valve on the supply line. Toilet valves are on the wall behind the toilet. Sink valves are under the sink. Turn clockwise to close.
Do This Right Now: Find Your Valve
Before you need it, walk your property and locate your main shut-off. Test it (turn it off and back on) to make sure it moves freely. Valves that haven’t been operated in years can seize. If yours won’t turn, call us to service it before an emergency forces the issue.
Related: 24/7 Emergency Plumbing Service