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How to Install a Laundry Shut-Off Valve

In this step-by-step video, This Old House plumbing and heating contractor Richard Trethewey shows a sure-fire way to prevent water damage from a leaking washing machine

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

Steps:

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.