Turn off the water supply to the faucet. There may be shut off valves under the sink, if not, you will need to turn off the main water supply to the house. Close the drain in the sink to prevent losing any dropped parts. Remove the small round red and blue handle screw cover located just under and on the front side of the control handle. Pry it off using a fingernail or the blade on the utility knife.
Insert the hex wrench into the hole under the cover you removed and loosen the handle screw by turning it counterclockwise one turn or so until the handle will lift off. Remove the handle from the faucet and set it aside. Remove the dome shaped cap that is under the handle by turning it counterclockwise with your hand; if it won’t turn, use a plumber’s strap wrench to loosen it. Remove cap and set aside.
Loosen the brass retainer nut that is under the cap counterclockwise using either an adjustable end wrench or water-pump pliers. Spin off the nut and set aside. The faucet ceramic control cartridge is now visible. Lift it up and out and set aside. Grasp the spout and while pulling upward and turning left and right slightly, pull the spout off the faucet body. Remove and replace the two rubber O-rings found under the spout.
Apply a thin coat of plumber’s lubricant to the outside of the O-rings. Replace the spout by gently sliding it back onto faucet body and turning it left and right a little as you push it back into place. Place the replacement cartridge back into the hollow spot inside the spout and faucet body. Be careful to place it so the two protruding tabs on the underside of the cartridge set squarely into the drilled indentations of the faucet body.
Replace the brass retaining nut by turning it clockwise until snug and then tighten slightly with an adjustable end wrench or water-pump pliers; be careful not to over tighten. Spin the dome shaped cover back on and snug it slightly with the strap wrench. Replace handle, tighten handle screw and replace the red and blue screw cover by pushing it into place. Open the drain, turn water back on and run water through faucet testing for leaks and proper function.
Things You Will Need
- 2.5 mm hex wrench
- Adjustable strap wrench
- Replacement ceramic disk cartridge
- Replacement O-rings
- Adjustable wrench
- Water-pump pliers
- Utility knife
- Plumber’s lubricant
- You can easily remove O-rings by lifting an edge with a fingernail or sharp edge and then rolling the O-ring off the faucet.