stopcock

/ˈstɒpkɒk//ˈstɑpkɑk/

noun

  1. 1

    A valve, tap or faucet which regulates the flow of liquid or gas through a pipe.

  2. 2

    A main shutoff for water to a home from a municipal supply. Usually these valves exist in pairs, one outside the property boundary and one inside the property boundary.

    If you have a burst pipe turn the water off at the stopcock.

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