How To: Install a Sink Shut-Off Valve

Install a sink shut-off valve—or a pair of them—so that if and when repairs becomes necessary, it's easy to interrupt the water supply.

Here’s how to install a hot or cold water shut-off valve under your sink. Apply plumbing sealant to the shut-off threads and attach it with a nut from the faucet tube. Measure the length of the copper pipe you need to connect the shut-off valve to the coupling in the floor. Finish the job by soldering both joints.

For more on plumbing, consider:

How To: Install a New Kitchen Sink
8 Common Water Problems—and Their Cures
Top Tips for Troubleshooting Low Water Pressure