How to Fix a Leaky Shower or Tub Faucet

Drips from a showerhead or tub spout are more than just an annoying sound in the night; they are a constant drain on your water bill and a slow invitation to mineral buildup. Most modern faucets operate on a cartridge system, while older fixtures rely on stems and washers. Identifying which one you have is the first step toward silence. Done well, this repair restores smooth handle operation and a watertight seal. You are essentially dismantling the handle assembly, pulling the internal wear parts, and sliding in fresh components. It is a straightforward mechanical job that turns a persistent leak into a five-minute task once you have the right parts in your hand.

  1. Kill the Water First. Locate the water shut-off valves for the bathroom, usually found under the vanity or behind an access panel. If no dedicated valves exist, turn off the main water supply to the house and open a low-level faucet to drain the lines.
  2. Pop Off the Decorative Cap. Pry off the decorative cap on the handle to expose the screw. Use a screwdriver to remove the screw, then pull the handle off the valve stem; if it is stuck, use a light tapping motion or a specialized handle puller.
  3. Loosen the Retaining Nut. Use an adjustable wrench or a socket set to remove the packing nut or retaining clip holding the cartridge in place. Be careful not to use excessive force, as the underlying copper piping can twist if not braced.
  4. Photograph, Then Pull. Pull the old cartridge straight out of the valve body using pliers. Note the orientation of the cartridge before pulling it out, as it must be replaced in the exact same position.
  5. Grease and Seat New Cartridge. Slide the new cartridge into the valve body, ensuring the tabs or notches line up perfectly with the housing. Push it in until it is fully seated and the alignment marks are centered.
  6. Snap Everything Back Together. Thread the retaining nut back onto the valve body and tighten it snugly. Replace the handle, tighten the set screw, and press the decorative cover back into place.
  7. Verify the Seal Holds. Turn the water supply back on slowly and check the handle area for any moisture. Open the shower valve to flush out any trapped air, then close it tightly to confirm the leak is gone.