Reviewed by AJ Robles Owner & Licensed Master Plumber · LIC# RMP 46529 The fastest way to limit damage in a plumbing emergency is to stop the water — but only if you already know where the valves are and that they turn. Spend two minutes this weekend learning this, and you'll save yourself gallons of damage later. There are two levels: a single fixture, and the whole house.
Shutting off one fixture
Under a sink or low behind a toilet you'll find a small oval or football-shaped valve on the wall — the angle stop. Turn it clockwise (righty-tighty) until it stops. That isolates just that fixture, so you can deal with a running toilet or a leaking faucet without cutting water to the rest of the house.
Shutting off the whole house
For a burst pipe or any leak you can't isolate, go to your home's main shutoff valve. In most Greater Houston homes it's:
- Near the street, inside or beside the water-meter box (this one may need a meter key).
- Where the main line enters the house — often near an exterior wall, the garage, or a front flower bed.
Turn it clockwise to close. This cuts water to the entire home and stops most active leaks within seconds.
Know your valve type
- Ball valve (lever handle): handle in line with the pipe = open; handle crosswise = closed. A quarter turn does it.
- Gate valve (round handle): turn clockwise (several turns) to close. These are older and can seize — turn gently.
If a valve won't turn
Don't force an old, stiff valve — they can snap and turn a small problem into a big one. If a fixture's angle stop is stuck, use the main shutoff instead. Worn or seized valves are a quick, inexpensive repair, and it's worth replacing them so they work the day you need them.
Make it a household habit
Show everyone in the home where the main shutoff is and confirm it turns. Then, if a real emergency hits, you'll already know the first move — see our plumbing emergency checklist for the rest. We answer 7 AM – 7 PM, 7 days/week, if you'd rather we handle it.