from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A tap or valve used to draw off water (or other liquid) from the lowest part of a tank, boiler etc.


Sorry, no etymologies found.


  • Put a hose on the draincock at the bottom of the tank and run it to the drain; the drain must be below the tank so it can work by gravity.

    Weekend Project: Flush your water heater

  • Note to customers: When operating the compressor be sure the draincock is closed and the quick disconnect is not stuck. Gold Box Deals

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