How to Repair a Leaking Delta Tub Faucet With Single Handle

Before you begin, make sure you have all the necessary tools and materials:

- Adjustable wrench

- Phillips head screwdriver

- Flat head screwdriver

- Replacement cartridge

- O-rings

- Grease

- Plumber's putty

Step 2: Turn Off the Water Supply

Locate the water supply valves under the sink or behind the tub access panel. Turn the valves clockwise to turn off the water supply to the faucet.

Step 3: Remove the Handle and Escutcheon

Use your Phillips head screwdriver to remove the screws that hold the handle in place. Pull the handle straight up to remove it.

Next, use your flat head screwdriver to pry off the escutcheon (the decorative cover around the faucet base). Be careful not to scratch the finish of the faucet.

Step 4: Remove the Cartridge

Use your adjustable wrench to loosen the nut that holds the cartridge in place. Be careful not to drop the nut into the drain.

Once the nut is loose, you can pull the cartridge straight out of the faucet body.

Step 5: Inspect the Cartridge and O-Rings

Inspect the cartridge for any damage or wear and tear. If the cartridge is damaged, you will need to replace it with a new one.

Also, check the O-rings on the cartridge for any damage or wear. If the O-rings are damaged, you will need to replace them with new ones.

Step 6: Apply Grease to the New Cartridge

Apply a thin coat of grease to the new cartridge. This will help to create a watertight seal and prevent leaks.

Step 7: Insert the New Cartridge

Insert the new cartridge into the faucet body. Make sure that the O-rings are seated properly in the grooves.

Step 8: Replace the Nut

Replace the nut that holds the cartridge in place. Tighten the nut with your adjustable wrench until it is snug. Be careful not to over-tighten the nut, as this could damage the cartridge.

Step 9: Replace the Escutcheon

Replace the escutcheon around the faucet base. Make sure that the escutcheon is seated properly and that the screws are tightened securely.

Step 10: Replace the Handle

Replace the handle on the faucet. Tighten the screws that hold the handle in place until they are snug.

Step 11: Turn on the Water Supply

Turn the water supply valves under the sink or behind the tub access panel counterclockwise to turn the water supply back on.

Step 12: Check for Leaks

Open the faucet and check for leaks. If there are any leaks, tighten the nuts and/or O-rings until the leaks stop.

Congratulations, you have now repaired your Delta tub faucet with a single handle!