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Find and Test Your Main Shut-Off Valve

Every plumbing emergency gets smaller the moment the water stops. That only happens fast if you already know where the main valve is and that it works.

  • About 2 minutes to read
  • Best timing: any time of year
  • Tools: flashlight, bucket, rags, adjustable wrench
  • Written for homeowners, not trades
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Contemporary bathroom featuring a large mirror, sleek sink, and minimalist decor in neutral tones
Contemporary bathroom featuring a large mirror, sleek sink, and minimalist decor in neutral tones.

Open 7 daysEmergencies any hour

  • Licensed plumbers, details on request
  • Quote before any work starts
  • Pickering and Durham Region
  • Residential and commercial

The routine, in order

  1. Find where the water line comes through the floor or front wall; the meter is usually right beside it.
  2. Look for a valve on the home side of the meter. That is the one you will use.
  3. Turn it gently clockwise. A gate valve takes several turns; a ball valve needs a quarter turn, leaving the lever crosswise to the line.
  4. Open a cold tap upstairs and check that the flow stops within a minute.
  5. Open the valve again fully, then back it off a quarter turn so it does not stick open.
  6. Clip a bright tag to the valve and walk every member of the household to it.
Bench note: test the valve twice a year when you change the clocks. It keeps the moving parts free and reminds everyone where it is.

Why this matters in Pickering

Pickering houses span sixty years of building, and the main valve moves around with them. In 1960s and 1970s homes it is often a round-handled gate valve near the front foundation wall, sometimes behind a finished panel. In newer subdivisions it is usually a lever-handled ball valve beside the water meter. Gate valves that have not been turned in many years often seize or fail to close fully.

Toilets, sinks and the washer each have their own small stop valves. Learn those too; they let you isolate one fixture and keep the rest of the house running.

Slips worth avoiding

  • Forcing a stuck gate valve with a wrench, which can snap the stem
  • Using the valve on the street side of the meter, which belongs to the Region
  • Building a closet or panel over the valve with no access door
  • Testing it for the first time during an actual leak

Fixture valves

Toilets, sinks and the washer each have their own small stop valves. Learn those too; they let you isolate one fixture and keep the rest of the house running. Add the location of everything to your plumbing emergency kit and read preventing frozen pipes before winter.

Time to ring a plumber

If the valve is seized, weeps at the stem or does not stop the water, plan a replacement before you need it. A main shut-off valve replacement to a quarter-turn ball valve is a quick job. Call us straight away if water is leaking and you cannot stop it.

Questions callers ask

Can I shut off the water at the curb myself?

The curb stop is Region of Durham property and opens only with a special key. Call the Region for that.

Related pages

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