With a few simple tools, replacing a cartridge for a single-handle faucet is easy.

Replacing the cartridge for a single-handle Delta or Peerless brand faucet is a simple task.

Step 1: Use the shut-off valves located beneath the sink to turn off the water supply to the faucet.

Step 2: Move the faucet handle to the open position to relieve any pressure in the water lines. If the water is still running, shut off the water supply using the main water valve instead.

Step 3: Use a flat-head screwdriver to remove the red and blue button located on the front of the faucet handle.

Step 4: Use a 1/8-inch hex wrench to remove the set screw located beneath the red and blue handle button. If the screw won’t budge, spray the screw with a little penetrating lubricant, such as PB Blaster or Liquid Wrench. Allow the lubricant to soak in and try to loosen the screw again.

Step 5: Once the set screw is removed, lift the faucet handle up and off the cartridge stem. Set the handle and the set screw aside. Be careful not to lose the set screw.

Step 6: Unscrew the faucet cap located beneath the handle. Rubber or vinyl-coated gloves may also help in gripping the cap. If the cap is stuck, a strap wrench should help to loosen it without damaging it.

Step 7: Once the cap is removed, use an adjustable wrench to unscrew the bonnet nut.

Step 8: Lift the bonnet nut, sleeve and cartridge out from inside the faucet.

Step 9: Check the inside of the faucet for debris or broken pieces. Use a soft cloth to remove any buildup found in the faucet.

Step 10: Insert the new cartridge into the faucet. Make sure to line up the nubs on the bottom of the cartridge with the indentations on the inside of the faucet. The cartridge should slip easily into place.

Step 11: Slip the sleeve and bonnet nut over the cartridge. Hand-tighten the nut into place and use an adjustable wrench to finish tightening the nut. If the nut is loose, the faucet may still leak. If it is too tight, handle movement may be impeded.

Step 12: Screw the cap back into place.

Step 13: Slip the handle over the cartridge stem and secure to the stem with the set screw.

Step 14: Turn the water back on and test the faucet for leaks.

— Have a home improvement question for the Fix-It Chick? Email it to Linda Cottin at features@ljworld.com.