How to Fix a Leaky Shutoff Valve

Shutoff valves under sinks or behind toilets can go a long time without giving any problems but when you need to shut off the water that is when the valves might develop a leak. Usually the cause is a stiff washer.

Difficulty: Easy

Instructions

Things You'll Need:

• Slip joint pliers
• Masking tape
• Small container
• Screwdriver
• Clean rag

1. Wrap masking tape on the jaws of your slip joint pliers. This prevents scratches on the shutoff valve.

2. Grasp the packing nut located behind the valve's handle with the slip joint pliers. Gently turn the nut 1/8 of a turn clockwise. Watch to see if this simple repair stops the drip. If the leaking continues, go to Step 3.

3. Turn off the main water supply to the house. Drain the pipes. Have a small container nearby to catch the small amount of water still left in the valve.

4. Take the shutoff valve apart. You do not need to remove it from the supply line or the line going into the toilet or sink. Remove the screw from the valve's handle. Untwist the packing nut. Pull out the threaded valve stem. Carefully note the position of the neoprene washers.

5. Clean the washers. Use a clean rag to remove any mineral deposits. Work them gently to get them flexible again.

6. Put the pieces back together again. Don't use plumber's putty or pipe dope. You don't want to use anything that might gum up the valve and make it harder to repair in the future.

7. Turn the water back on. Fill the line and watch for leaks. If the leak persists, replace the shutoff valve.