How To Turn Off Water Under Kitchen Sink?

Water is a crucial commodity in any home, and one of the most popular places where it is used is the kitchen sink. A water shut-off valve is an absolute necessity in any kitchen. It’s the valve that turns off the water to your sink, allowing you to remedy a plumbing problem without having to turn off the water to the entire house.

If you have a countertop or table mount faucet installed in your kitchen sink, it is natural to have stop valves, concealed stop cock faucets, or angle valves underneath the sink to control the flow of water into the faucet.

Continue reading to learn the right way to turn off the water under the kitchen sink:

How To Turn Off Water Under Kitchen Sink?

Here’s what to do if your shut-off valve needs to be turned off.

Evaluate and Consult

The first item to consider is the type of stop valve or angle valve that has to be replaced. The reason for this is that you will only be changing the stop valve faucet, not the entire setup.

As a result, you must accurately identify the kitchen fitting and its name in order to obtain a suitable new angle valve or concealed stop valve for your kitchen sink. A plumber’s consultation would be good.

Turn off the Main Water Supply and Drain any Remaining Pipe Water

After purchasing the appropriate fitting for the size and pipelines, the following step is to turn off the main water supply in the pipes. This will prevent water waste if there is any damage or mistake during the replacement process.

After cutting off the main water supply, turn on your faucets and let the water in the pipes drain completely. This helps to prevent spilling.

How To Turn Off Water Under Kitchen Sink?

Take Out the Faulty Valve

If your valve is threaded into the wall, simply twist it to disconnect it from the supply line. Attach a pipe wrench to the flat sides of the valve body where it connects to the pipe. Counterclockwise rotate the thing to release and remove it.

Exposed Supply Line Inspection

After removing the old defective valve, carefully inspect the exposed supply line. You may wish to double-check that it is not damaged or that it is not the primary source of the leak.

Check that the supply line threads are intact and capable of supporting a replacement stop valve. Also, make sure you replace the Teflon tape.

Repair the New Valve

Connect the water pipes to the kitchen sink faucet after installing the new valve on the threads. Check that the fitting is correctly tightened and screwed and that the flanges (if any) are solidly fastened. Turn on the main power supply and check for any leaks. If there is any leakage, tighten the valves with a wrench; otherwise, you are good to go!

How to Repair a Leaky Water Shut-Off Valve Under the Kitchen Sink?

Water leaking under the kitchen sink could be caused by leftover water. As a result, be certain that all of the water has been removed and that the area is fully dry.

To repair a water shut-off valve, first cut off the main water supply, then reconnect the cold water shut-off valve and thoroughly clean it to eliminate any blockages or corrosion. Wrap the valve in the plumber’s tape. It will help to halt the leak and is both inexpensive and effective.

Please use a flashlight to thoroughly inspect the Water Shut Off valve and replace it if it is damaged. To do so, first, turn off the main water supply valve and then proceed with the replacement of the cold water shut-off valve.

The water leakage problem is caused by a leaking water shut-off valve under the kitchen sink. It is preferable to replace them. You can purchase them from Amazon or your local home improvement store.

Features Of Shut-Off Valves

Some water shut-off valves include additional features, such as a built-in valve that turns off the water when the kitchen faucet is turned off.


The material of the water shut-off valve should be chosen based on the material of the sink. A metal water shut-off valve should be used if the sink is composed of metal. A plastic water shut-off valve should be used if the sink is made of plastic.


The water shut-off valve’s shape should be determined by the shape of the sink. A round water shut-off valve should be used surrounding the sink, and a square water shut-off valve should be used if the sink is square.


The cost of a water shut-off valve varies based on the kind and size of the valve used.

If you’re like most people, you don’t think twice about your plumbing until something goes wrong. When something goes wrong with your kitchen sink, it may be a major annoyance. That is why a good water shut-off valve for your kitchen sink is essential.

Related Questions

Is there a water shutoff valve under the kitchen sink?

Under-sink shutoff valves, also known as fixture shutoffs or stop valves, allow you to turn off the water to your sink (or other fixtures) without having to use the main shutoff valve in your home. These simple tiny valves are rarely utilized, but when they are, they occasionally leak.

What should you do if your sink won’t turn off?

To get the faucet to turn off, you must first turn off the water. Then you’ll need to schedule an appointment with a repair shop. They’ll have to disassemble the faucet to get to the valves in the wall, then reassemble it. If your sink faucet is the source of the problem, the valves may also be to blame.


Many repair and replacement jobs require you to turn off the water to your kitchen sink. Every home has several shutdown positions that can be used for a variety of purposes depending on the issue at hand. Water can be turned off directly at a fixture or appliance, at the water heater, or at the house’s main shutoff valve.

If the problem can’t be resolved at home, you should consult a professional.