How to Repair Leaks on a Sink Compression Faucet

A faucet's O-ring is often responsible for leaks.

A leaking compression faucet could be caused by loose or worn-out parts. Compression faucets have separate handles for cold and hot water, as well as threaded stems inside the faucet. You may need to check the instruction manual for your faucet to see the specific washers required for replacements. Contact a plumber for assistance if you are unable to correctly install the faucet.

Things You'll Need

• Screwdriver
• Channel-type pliers
• Seat wrench or seat dressing tool
• Handle puller
• Utility knife
• Packing string
• Universal washer kit
• Heatproof grease
• Valve seats

Instructions

1. Turn off the water supply near your water meter at the main supply valve or the shutoff valve. Return to the sink and take the index cap from the top of the handle. Remove the screw and pull up on the handle to remove it.

2. Clamp side bars of the handle puller beneath the handle if it will not come off. Ease the puller into the faucet stem, tightening until you are able to free the handle. Use channel-type pliers to free the stem assembly from the faucet body.

3. Replace or resurface the valve seat if it is worn, using a seat wrench or dressing tool. Replace the entire faucet if the faucet or stems are worn. Take the brass stem screw from the stem, as well as the stem washer. Unscrew the threaded spindle from the retaining nut and cut off the O-ring with a utility knife.

4. Replace the O-ring with a duplicate. If there is a packing string instead of an O-ring, put new wrapping string around the stem and beneath the retaining nut. Install a new washer and steam screw, and coat all the parts you use with heatproof grease. Reassemble the rest of the faucet.

5. Restore the water supply and turn the faucet on to check for leaks. If you see leaks, tighten the parts.

Tips & Warnings

• Older compression faucet models usually require frequent repairs, so it may be best to replace the entire faucet instead of continually fixing it.

• Always keep the water supply off while you work to prevent leaks.

• Keep parts organized while you work. Since parts are small, it may be best to place labels near each part in a cleared area to avoid confusing or losing them.

References

• "Ten Pound Books: Home Repair Guide;" Creative Publishing International, Inc.; 2007.