How to Replace a Faucet Valve Cartridge

The source of a leaky cartridge valve can usually be traced to worn O-rings.

Cartridge faucets are commonly used to control the water supply in sinks. The top of the cartridge is attached to the faucet’s handle via a single screw. Rotating the screw causes several holes within the body of the faucet to align with the faucet housing and direct water out of the faucet’s spout. Along the length of the cartridge are rubber O-rings. When these rings wear out, the faucet leaks. Fortunately, replacing a cartridge faucet valve takes only a few minutes.

Things You'll Need

• Utility knife
• Screwdriver
• Adjustable wrench
• Vinegar
• Plumber’s grease

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Instructions

1. Turn either the two valves below the sink, or the single water supply valve at the main water, in a clockwise direction to turn the water off.

2. Pry the decorative index cap off of the center of the faucet handle with a utility knife to reveal the handle’s screw.

3. Rotate the handle’s screw in a counterclockwise direction with a screwdriver until the screw detaches from the handle. Lift the handle away from the faucet to reveal the faucet’s retaining nut.

4. Rotate the faucet’s retaining nut in a counterclockwise direction with an adjustable wrench until the nut detaches from the top of the faucet cartridge.

5. Lift the old cartridge out of the faucet housing. If the cartridge will not release from the housing, pour a small amount of vinegar around the cartridge to loosen any mineral deposits.

6. Apply a light coat of plumber’s grease to the two rubber O-rings located along the length of the new cartridge. Press the cartridge into place within the faucet housing.

7. Position the faucet’s retaining nut over the top of the cartridge. Rotate the nut in a clockwise direction with the adjustable wrench until the nut is secure.

8. Place the handle over the top of the cartridge. Tighten the handle’s screw into the center of the handle with the screwdriver.

9. Push the decorative index cap over the handle’s screw.

10. Rotate the applicable water valve(s) in a counterclockwise direction to restore the supply of water.

References

• “Ten Pound Books: Home Repair Guide”; Creative Publishing International; 2007
• “Ten Pound Books: Home Wiring and Plumbing”; Creative Publishing International; 2008