Step 4 · Purchase Replacement Parts
Take the old faucet cartridge, and any associated O-rings or seals you removed, to a local hardware or plumbing supply store. Having a picture of the faucet on your phone can also be very helpful for identification. Ask an employee in the plumbing department for assistance in finding an exact match for your parts. Faucet cartridges are highly specific to the brand and model, so a visual match is critical. While at the store, purchase the new faucet cartridge and a small tub or tube of heat-proof, non-toxic plumber's grease.