• In this video, This Old House plumbing and heating contractor Richard Trethewey installs a laundry shut-off valve.

    1. Close the existing shut-off valves that provide hot and cold water to the washing machine.
    2. Use a wrench to disconnect both washing machine hoses from the valves; use a rag to catch any drips.
    3. Tighten an adapter onto each of the hot- and cold-water shut-off valves.
    4. Measure and cut plastic pipe to span from the adapters to the elbows on the automatic shut-off valve.
    5. Assemble the plastic pipe and fittings using PVC primer and cement.
    6. Thread an adapter onto the hot- and cold-water side of the automatic shut-off valve.
    7. Hold the automatic shut-off valve in position against the wall, and mark the two mounting holes.
    8. Drill holes on the marks and install hollow-wall anchors.
    9. Screw the shut-off valve to the wall.
    10. Reconnect the hot- and cold-water washing machine hoses. Then open the water shut-off valves.
    11. Place leak sensor on floor and, then connect it to the automatic shut-off valve.
    12. Plug washing machines power cord into the automatic shut-off valve, then plug the valve into the wall outlet.
    • Difficulty: Moderate
      Requires basic plumbing skills

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      Tools List

      • water pump wrench
      • tubing cutter
        Tubing cutter or hacksaw
      • drill

      Shopping List

      Automatic washing machine shut-off valve

      PVC pipe and assorted fittings, for connecting the valve to the water shut-off valves

      PVC primer and cement, for gluing together plastic pipe and fittings

      Hollow-wall anchors and screws, used to fasten automatic valve to the room wall