There s an easy way to fix it and you may want to give it a try.
Toilet bowl shut off valve leaking.
Hopefully this is enough to compress the rubber gasket so that it is sealed on the valve stem to prevent water leaks.
Tighten the packing nut on the toilet shutoff valve one eighth turn clockwise to try to seal a leak around the nut.
Support see jane dri.
If your water supply valve is leaking you may not need to replace it.
Wrap cloth or masking tape on the plier s jaws to protect the nut s finish.
Dripping shut off valves can leave puddles of water on the bathroom floor which can ruin the flooring make the room look dirty destroy bathroom furniture cause mold and mildew to grow and run up your water bill.
Toilet shut off valves are rarely used and as a result normally get stuck.
Shut off the water at the valve and drain the water from the toilet tank as indicated above.
When you finally force them to close you may notice that they will start to leak.
Use a plunger to force out any water that remains in the bowl.
Alternately fill a five gallon bucket with water then pour a steady stream down the bowl from between 12 and 18 inches above the opening.
This will also force the water out.
Tighten the packing nut.
The most common problem for a toilet shut off valve is that it can develop a leak.
I replace an old valve that was leaking.
Use light steady pressure so you don t damage the water lines.
Do not remove the valve just tighten the packing nut.