Step 1: Turn off the water supply

turning off the water
Photo: Kolin Smith
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Start by turning off the shutoff valve for the cold-water supply to the kitchen sink area, which is typically located in the basement, crawl space, or utility.

If your home doesn't have a shutoff for the kitchen, you'll have to turn off the water at the main valve for the house.

Ask a helper in the kitchen to open the sink's cold-water faucet to release pressure in the pipe.

Check the side of the shutoff valve for a small nut, called a drain cap. If you see one, hold a bucket under the valve and loosen the nut with your fingers or a pair of pliers. Any water trapped in the pipe between the sink and the valve will drain out.
Ask TOH users about Kitchen Sinks

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    Tools List

    • drill
      Drill/driver with step-drill bit,
      to drill hole in sink top
    • propane torch
      Propane torch
    • emery cloth
      Emery cloth,
      for cleaning pipe prior to soldering
    • adjustable wrench
      Adjustable wrench
    • tongue-and-groove pliers
      Tongue-and-groove pliers
    • tubing cutter
      Close-quarters tubing cutter
    • basin wrench
      Basin wrench,
      to tighten hex nut that holds filter faucet to sink top
    • copper fitting brush
      Copper fitting brush (for cleaning copper tubing and fittings
    • 16-foot tape measure
      Tape measure
    • eye goggles
      Eye goggles
    • centering punch
      Center punch,
      to strike a starting point on stainless steel sink deck prior to drilling

    Shopping List

    1. WATER FILTER KIT

    2. LEAD-FREE SOLDER AND PIPE FLUX

    3. 1/2-INCH COPPER TEE

    4. SEVERAL FEET OF 1/2-INCH COPPER TUBING

    5. 1/2-INCH FEMALE ADAPTER

    6. 1/2-INCH TO 1/4-INCH REDUCER

    7. 1/2-INCH BALL VALVE

    8. TEFLON TAPE

    applied to reducer before threading onto female adapter



    9. TARP OR BLANKET

    to protect kitchen floor



    10. FIRE-RESISTANT CLOTH AND FIRE EXTINGUISHER