Water Shut Off Valve Leaking Under Sink

Avoid gumming up the inside of the shutoff valve.

Water shut off valve leaking under sink.

Don t use any pipe dope or plastic tape on the valve stem s threads. Under sink shutoff valves also called fixture shutoffs or stop valves allow you to turn off the water to the sink or other fixture without having to use the home s main shutoff. There s an easy way to fix it and you may want to give it a try. Turn on all the faucets and flush all the toilets associated with the main shutoff valve to empty the pipes of water.

Once tight and in place turn the valve on and test the kitchen faucet. Close the main water supply to the leaky valve. When i open it the splash of water stops and there is no leaks. If the valve leak persists turn off the main water shutoff valve then disconnect the valve and replace it.

This valve usually is in the basement or a utility closet and it will be clearly labeled. Pull the nut back to expose the valve s threaded spindle. Wrap teflon packing around the spindle then hand tighten the bonnet nut back into place. Attach the water line from the faucet to the water supply shut off valve using plumbers tape.

The shut off valve under a sink can go unattended for years without giving any problems but once it starts leaking it can lead to a mess quickly. If you re fixing a hot water valve turn off the hot water outlet on the water heater. If this happens to you you can simply replace the valve with a new valve that matches the old one. What can i do without shutting off the main water supply.

Turn the water supply valve under the sink off. Place a bucket or a thick towel on the floor under the leaky valve just in case some residual water leaks out during work. If it s a cold valve find the main water shutoff for the house usually. These inexpensive little valves rarely get used and when they do sometimes they leak.

There should be no leaks and all should be good. But the moment i slightly turn the valve to close the water sprays all around the valve. Ignoring minor leaks can waste up to three gallons of water every day and can also lead to permanent water stains and rot under your sink. If your water supply valve is leaking you may not need to replace it.

Turn the home water supply back on. Support see jane dri. Good job you have fixed your leak. Loosen the bonnet nut on the leaky shut off valve with an adjustable wrench.

Required tools for this project. Reassemble the shutoff valve turn the main house valve back on and check for leaks.