Dear Sarah Jane,
Thank you for your question. To change the cartridge, first turn off the water supply to the faucet.
On the lever handle, you should find a small hex screw that can be loosened with a 1/8" Allen wrench. The handle will lift off when this screw is loose enough.
Once the handle has been removed, unscrew the dome-shaped cap and the bonnet nut. The domed shaped cap and the bonnet nut will both unscrew counter-clockwise.
Once the cap and bonnet have been removed, grasp the stem of the cartridge to which the handle was attached and pull it out.
You will need to reinstall these parts later, so be sure to note how they are positioned in the valve.
Reinstall the cartridge, the bonnet nut, and the cap. Finally, reinstall the handle. At this point, you can test the faucet again.
Date published: 2017-07-27