• In this video, This Old House plumbing and heating expert Richard Trethewey taps into a water-supply line.

    1. If necessary, drill a -inch-diameter hole through the floor directly behind the refrigerator.
    2. Turn off the water to a nearby cold-water supply line.
    3. Use a strip of emery cloth to buff-clean a section of the copper water line.
    4. Cut into the cold-water line using a tubing cutter.
    5. Brush flux onto a ½-inch copper transition fitting and onto the pipe end.
    6. Push the fitting onto the pipe, then heat the fitting with a propane torch.
    7. When the flux starts to bubble, solder the fitting onto the pipe.
    8. Wrap Teflon tape around the threads of a ¼-in. compression tubing connector.
    9. Thread the connector into the transition fitting; tighten the connector with pliers and an adjustable wrench.
    10. Take the flexible water-supply tubing from the back of the refrigerator and feed it down through the hole in the floor.
    11. Brush pipe dope onto the cone-shaped ground joint connection.
    12. Thread the nut on the tubing end onto the compression connector soldered to the cold-water supply line. Tighten the nut with pliers and an adjustable wrench.
    13. Turn the water back on and test the water dispenser in the refrigerator door.
    • Difficulty: Easy to moderate
      Requires basic plumbing skills, including soldering

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      Video Directory

      Selected Topic/Section

      Tools List

      • drill
        Drill/driver fitted with -inch spade bit
      • propane torch
        Propane torch
      • tubing cutter
        Tubing cutter
      • wire-brush pipe cleaner
        Wire-brush pipe cleaner
      • tongue-and-groove pliers
      • adjustable wrench
        Adjustable wrench

      Shopping List

      Transition fitting and compression tubing connector

      Emery cloth

      Flux and lead-free solder

      Teflon tape

      Pipe dope