Introduction
A worn cartridge is the most common cause of a two-handle faucet that will not stop dripping. Replacing this inexpensive part restores a watertight seal, saves water, and prevents further damage to the fixture and countertop. Use this guide to safely remove the faulty cartridge, install a new one, and get your faucet working like new.
Tools
Parts
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Collect rags, a hex key, a flathead screwdriver, a Phillips screwdriver, a crescent wrench, and the correct replacement cartridge.
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Turn the cold water supply valve under the sink clockwise until it stops.
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Open the faucet and watch for dripping to see if the leak stops.
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If water still drips, close the hot water valve as well.
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Note which handle controls the valve that stopped the leak to identify the faulty side.
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Insert a hex key into the handle set screw and turn it counter-clockwise until the screw comes out.
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If the handle has a cap, gently pry it off with a flathead screwdriver to reveal the screw.
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Loosen and remove the internal screw with a Phillips screwdriver to free the handle.
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Back off any remaining decking hardware to gain clearance around the stem.
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Place a crescent wrench on the packing nut and turn it counter-clockwise until the nut lifts free.
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Pull the cartridge straight up and out of the faucet body.
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Wipe moisture from the faucet cavity and surrounding surfaces with clean rags.
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Open both supply valves fully.
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Run the faucet for one minute to flush air and debris and confirm that no leaks remain.
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With the new cartridge in place and the faucet leak-free, remove the rags from the drain and store your tools. Periodically check the faucet for drips over the next day to ensure the repair is holding.
