Replace the faucet cartridge

Step by step

1. 1
   Shut the water off

   Close the hot and cold valves under the sink. Open the faucet to relieve pressure.
2. 2
   Pull the handle

   Pop the small cap, loosen the set screw with an Allen key, and lift the handle off.
3. 3
   Lift the cartridge

   Unscrew the retaining nut. Pull the old cartridge straight up — note the orientation of the tabs.
4. 4
   Fit the new one

   Drop the new cartridge in the same orientation, tighten the nut, and refit the handle.
5. 5
   Turn water back on

   Open the valves slowly. The drip should be gone. If it still weeps, check the aerator next.

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