How to Repair a Leaky Single Handle Cartridge Faucet
Your kitchen faucet gets a lot of use, so you want to keep it in tip top shape. If you find that your single handle, Cartridge (disk faucet) faucet is leaking water, you can replace a few of its parts without spending a lot of time and money on a new faucet. The best part is, you can do it all by yourself.
Tools required: Allen Wrench, Wrench, Smooth Jaw Pliers, Screwdriver, Cleaner to Remove Mineral Build-up
Turn off the water supply to the sink. The water shutoff is usually found directly under the sink and consists of a small valve and a small handle.
Remove the handle screw with an Allen wrench, and then remove the handle from the Faucet.
With the handle removed the disc cartridge is now exposed. Some styles of cartridges have a retainer nut, retainer clip or screws that hold it in place. In this example, remove the retainer nut which secures the disc cartridge.
Lift the cartridge out of the faucet body. You may need to use some pliers since these can get stuck a little. If the cartridge is stuck, gently grab it with the pliers and pull it out.
If the rubber seals are damaged or cannot be cleaned then they need to be replaced.
Take your old Cartridge to your local home improvement store and use the Perfect Match locator system from Danco or use the online Stem Finder. This system makes it easy to find your replacement.
Before installing the new cartridge, thoroughly clean the inside of the faucet body with cleaner intended to remove mineral build-up or use plain vinegar. Note: To help extend the life of the rubber seals, lubricate inside the valve body and exterior rubber components on the Cartridge with Silicone Grease.
Place the new or cleaned rubber seals back into their seal seats first (if applicable). Next, Insert the Disc Cartridge into the faucet body aligning the tabs or pegs on the cartridge with the notches or holes in the faucet body. Replace the retainer nut, clip or screws onto the cartridge to secure it in place.
Replace the retainer nut, clip or screws onto the cartridge to secure it in place.
Reinstall the faucet Handle by placing over the cartridge and tightening the set screw with an Allen wrench. Turn water supply back on and test for leaks.