How to Shut Off Your Water in an Emergency (Tri-Cities Homes)

The single most valuable plumbing knowledge in any home is thirty seconds long: knowing exactly where your main shutoff is and turning it before the damage spreads.

Find it before you need it

In most local homes the main shutoff is where the water line enters: commonly in the crawlspace near the front foundation wall, in the garage, or near the water heater. Homes on a slab often have it at the water heater or in a utility area. There is also a city valve at the meter by the street, but the house-side valve is the one to know.

How to close it

A lever (ball valve) turns a quarter-turn until it is perpendicular to the pipe. A round wheel (gate valve) turns clockwise, possibly several full turns. If a gate valve has not moved in decades, close it gently — old valves can be fragile, and forcing one is how a bad day gets worse.

Per-fixture stops

Toilets and sinks usually have their own small angle stops underneath. For a running toilet or a leaking supply line, the local stop ends the emergency without shutting down the whole house. If a local stop will not close or crumbles when touched, that is a sign the valves are due for attention.

Common questions

Where is the main water shutoff in my house?

Most commonly where the line enters the home: crawlspace near the front wall, garage, or beside the water heater. Find and label it on a calm day.

Which way do I turn the valve?

Lever handles: quarter-turn until the handle is across the pipe. Round wheels: clockwise, gently, possibly several turns.

What if the shutoff will not turn?

Do not force a seized valve — it can break in your hand. Use the fixture's local stop if the problem is at one fixture, and have the seized valve serviced.