A water supply valve that won t work or leaks when it is shut can be repaired.
Water valve under sink won t shut off.
Support see jane dri.
If the valve won t turn off the water or shut off completely it is likely tha.
There s an easy way to fix it and you may want to give it a try.
If there s buildup visible on the water valve pour a little white vinegar on the valve and scrub the buildup away with a wire brush.
Here is a video showing you how to handle a situation in which the water shut off valve or angle stop does not want to close or shut off.
If your water supply valve is leaking you may not need to replace it.
Place a folded piece of paper towel on the adjustable wrench jaws or wrap it around the shutoff valve prior to moving.
First make sure that you shut off the water that supplies the valve you re going to be working on.