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How to Shutoff a Water Supply

By Bob Formisano, About.com

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Shutoff Locally at the Sink or Toilet

Toilet Shutoff Valve

© Home-Cost.com 2006

Many plumbing fixtures have a local shutoff for the cold and if required, the hot water line.
  • To turn off the water supply to a plumbing fixture, locate its shutoff valve.
  • The valve(s) is usually located directly under the fixture as in the case of a sink or a toilet.
  • Once located, turn off the appropriate valve.

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