How To Install Shut Off Valves Under Bathroom Sink

Installing shut-off valves under your bathroom sink is a crucial plumbing task that enables you to control the water flow to your sink. This simple upgrade offers several benefits, including the ability to isolate your sink for repairs or replacements without disrupting the water supply to the rest of your home. Additionally, it provides a convenient way to turn off the water in case of leaks or emergencies.

Tools and Materials Required

Shut-off valves (angle type or straight type)
Wrenches (adjustable or basin wrench)
Teflon tape
Pipe cutter or hacksaw
Sandpaper
Bucket or bowl
Safety goggles

Step-by-Step Guide

1. Turn Off the Main Water Supply:

Start by locating the main water shut-off valve for your home, typically situated in the basement or crawl space. Turn the valve clockwise to shut off the water supply to your entire home.

2. Prepare the Sink and Drain:

Place a bucket or bowl beneath the sink to catch any dripping water. Use a wrench to loosen and detach the supply lines from the sink faucets. Place a plug or stopper in the sink's drain to prevent small parts from falling into the drain.

3. Cut and Prepare the Water Supply Lines:

Using a pipe cutter or hacksaw, cut the water supply lines a few inches away from the existing shut-off valves. Deburr the cut ends of the pipes with sandpaper to remove any sharp edges.

4. Install the Shut-Off Valves:

Wrap the threaded ends of the shut-off valves with Teflon tape in a clockwise direction. Screw the shut-off valves onto the cut ends of the water supply lines, ensuring a tight fit. Use a wrench to tighten the connections securely.

5. Connect the Supply Lines to the Sink Faucets:

Attach the supply lines to the sink faucets by hand-tightening the connections. Use a wrench to give them a final tightening, ensuring a leak-free seal.

6. Turn On the Water Supply:

Slowly turn on the main water supply valve to gradually restore water flow to your home. Check the connections under the sink for any leaks. If you notice any leaks, tighten the connections further or apply additional Teflon tape.

Conclusion

Installing shut-off valves under your bathroom sink is a simple yet effective way to enhance your plumbing system's functionality and safety. By following these steps, you can easily upgrade your bathroom sink and enjoy the convenience of controlling the water flow and isolating your sink for repairs or replacements as needed.