How Do I Fix a Leaky Bathtub Faucet?

A leaky tub faucet is most likely the result of a bad stem or a worn washer. The stem is the part that controls the flow of water through the faucet. Connected to the stem is the faucet handle. As the handle is turned, it raises and lowers the rubber washer, which allows the water to flow. Fixing a leaky bathtub faucet is simply a matter of examining these two parts and replacing whatever is necessary.

Difficulty:

Moderately Easy

Instructions

Things You'll Need

• Pliers
• Wrench
• Sharp knife
• Phillips screwdriver
• Flat-blade screwdriver
• Valve stem
• Faucet washer
• Silicone grease
• PIpe thread compound

1. Turn off the water supply for the leaky tub faucet. Look for a separate water supply shutoff valve for the bath faucet. This may be in a cabinet or behind an access panel adjacent to the faucet. Rotate the supply knob clockwise to turn off the water. If you cannot find a separate shutoff valve, turn off the water supply for your household. The main water cutoff valve is usually next to the water meter. Rotate the valve with pliers or a wrench to cut off the water.

2. Open the faucet and allow any water inside to run out. Remove the faucet handle screw cover, which is usually disguised as the "Hot" or "Cold" labels on the faucet handle, by inserting a sharp knife under the cap. Pop off. Remove the faucet handle screw with a Phillips screwdriver. Pull the faucet handle straight off.

3. Remove any escutcheons, if present. They may be held in place with a small screw on the underside that needs to be removed or simply screws out.

4. Remove the packing nut, which is the first hexagonal nut at the top of the valve stem, with the adjustable wrench. Remove the valve stem by unscrewing the second hexagonal nut, which is the base of the stem. Pull the valve out of the socket.

5. Analyze the valve stem. A cracked or broken stem could be the cause of the leak and needs to be replaced. Turn the stem over to examine the rubber O-ring washer. This, also, can be the cause of the leak if torn. To fix a malfunctioning washer, remove the retaining nut with a screwdriver, then pull the washer out of the socket. Replace with a new one and secure with a screw. Lightly apply a coat of silicone grease to the bottom face of the washer.

6. Apply pipe thread compound to the threads on the valve stem. Insert into the socket and tighten with the wrench. Slip the packing nut over the stem and tighten. Replace the escutcheon and secure. Place the faucet handle over the end of the valve stem. Insert the faucet handle screw and tighten with the Phillips screwdriver. Press the faucet handle cap back into place.

7. Restore the water supply. Open the faucet and check for proper operation.

Tips & Warnings

• Close the drain or place a towel over the opening so you don't lose any parts inside.

References

• HammerZone.com: Replacing a Faucet Washer to Fix a Leaky Tub Faucet
• The Family Handyman: How to Repair a Leaking Tub Faucet