How To Replace Hot Water Valve Under Bathroom Sink

The hot water valve under the bathroom sink is an essential component of your plumbing system. It allows you to control the flow of hot water to the sink, and it can be a source of leaks or other problems if it is not functioning properly. Replacing a hot water valve is a relatively simple task that can be completed in a few hours with the right tools and materials.

The most important thing when replacing a hot water valve is to ensure that you buy the correct valve for your sink. There are two main types of hot water valves: compression valves and cartridge valves. Compression valves are the most common type, and they work by using a washer to create a seal against the valve seat. Cartridge valves are a newer type of valve that uses a replaceable cartridge to control the flow of water. Once you have the correct valve, you can follow these steps to replace it:

Turn off the water supply to the sink. There will be two valves under the sink, one for the hot water and one for the cold water. Turn off the valve for the hot water.

Open the faucet to release any remaining water in the line.

Use a wrench to loosen the packing nut on the old valve. The packing nut is located where the valve body meets the water pipe.

Once the packing nut is loose, you can remove the old valve by hand. If the valve is stuck, you can use a pair of pliers to gently twist it back and forth until it comes loose.

Apply a small amount of plumber's putty to the threads of the new valve. This will help to create a watertight seal.

Screw the new valve into the water pipe by hand. Once the valve is hand-tight, you can use a wrench to tighten it further.

Turn on the water supply to the sink and check for leaks. If there are any leaks, you can tighten the packing nut further.

Replacing a hot water valve is not a difficult task, but it can be a bit tricky if you are not used to working with plumbing. If you are not comfortable working with plumbing, it is best to call a plumber to replace the valve for you.