Troubles with your tub and shower faucet can be surpisingly easy to fix. For a faucet that struggles with turning on and off, it's likely that the shower faucet cartridge needs to be replaced.
Once you shut off the water and remove the handle and escutcheon, you can quickly determine whether your single-handle tub and shower faucet is a cartridge, ball, or disk type.
Tub cartridge faucets work just like sink cartridge faucets. Usually the faucet only turns water on and off; a diverter valve on the spout directs water to the showerhead or the spout. A number of manufacturers make cartridges of varying designs, so take the cartridge with you when you shop for parts. You may need to replace the entire cartridge. Follow our steps below to see how to check your cartridge and get the job done.
Shut off the water and turn the faucet on until water stops running. To remove the handle you may need a hex wrench, which is sometimes included in a repair kit. Remove the screws holding the escutcheon and slide out the escutcheon.
If there is a chrome sleeve, unscrew it or pull it out. Use a small screwdriver to pry out the retaining clip that holds the cartridge in place.
Some cartridges can be removed easily with pliers; others require a special cartridge-pulling wrench (usually available at hardware stores or home centers) made for a specific brand of faucet.
If the cartridge is in good shape, replace the O-rings and any other worn parts. (It doesn't cost much more to replace the cartridge.) Rub the O-rings with a thin coat of silicone grease.
Insert the new or repaired cartridge into the faucet body, oriented as it was originally. Slide in the retaining clip and replace the handle and escutcheon.
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