How To Replace Hot Water Shut Off Valve Under Bathroom Sink

If you're experiencing water leakage beneath your bathroom sink, it's likely caused by a worn-out hot water shut off valve. Replacing this valve is a relatively simple plumbing task that can be completed in less than an hour with the right tools and materials.

In this guide, we'll provide step-by-step instructions on how to replace the hot water shut off valve under your bathroom sink, ensuring your plumbing system operates smoothly and efficiently.

Required Tools and Materials:

Adjustable wrench
Channel-type pliers
Replacement hot water shut off valve
Bucket
Plumber's putty

Step-by-Step Instructions:

1. Shut Off the Water Supply:

Before beginning any work, locate the main water shut off valve for your home and turn it off. This will prevent water from flowing through the pipes while you're replacing the valve.

2. Open the Faucet:

Turn on the hot water faucet in the sink to release any remaining water pressure in the pipes.

3. Place a Bucket Beneath the Valve:

Position a bucket under the hot water shut off valve to catch any water that may leak during the replacement process.

4. Disconnect the Water Supply Line:

Using an adjustable wrench, gently loosen the nut that connects the water supply line to the shut off valve. Be careful not to overtighten or damage the nut.

5. Remove the Old Valve:

Use channel-type pliers to grip the old shut off valve and unscrew it counterclockwise from the pipe. Some valves may require a combination of pliers and an adjustable wrench for removal.

6. Apply Plumber's Putty:

Roll a small amount of plumber's putty into a rope and wrap it around the threads of the new shut off valve.

7. Install the New Valve:

Hand-tighten the new valve onto the pipe, then use an adjustable wrench to further tighten it about three-quarters of a turn.

8. Reconnect the Water Supply Line:

Tighten the nut that connects the water supply line to the new shut off valve using an adjustable wrench.

9. Turn On the Water Supply:

Slowly turn on the main water shut off valve and check for any leaks around the new valve. Tighten the nut further if necessary.

10. Test the Valve:

Close the hot water faucet and open the shut off valve to ensure it's functioning properly and stopping water flow.

Tips:

If the shut off valve is severely corroded or damaged, it may be necessary to replace the entire water supply line.
Use a flashlight to illuminate the work area if necessary.
If you encounter any difficulties during the replacement process, don't hesitate to contact a licensed plumber for assistance.

Replacing the hot water shut off valve under your bathroom sink is a straightforward task that requires a few basic tools and materials. By following these step-by-step instructions, you can effectively address water leakage issues and ensure the smooth operation of your bathroom sink.