First make sure that you shut off the water that supplies the valve you re going to be working on.
Water valve under sink won t shut off.
Support see jane dri.
Prevent shutoff valves from freezing or becoming stiff by turning the valve on and off twice a year.
This tip if followed will work 85 percent of the time.
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.
If your water supply valve is leaking you may not need to replace it.
A water supply valve that won t work or leaks when it is shut can be repaired.
Place a folded piece of paper towel on the adjustable wrench jaws or wrap it around the shutoff valve prior to moving.
Otherwise you ll might find yourself dealing with a much larger problem that your initial one.