Symptoms
- Steady drip from the spout when nothing is running
- Dripping is worse right after use
- Handle may feel slightly loose
- Water bill has crept up
Likely causes
- CommonWorn rubber washer (compression faucets)Older two-handle tub faucets use a washer that compresses against a seat and wears out.
- CommonFailing cartridge (single-handle faucets)Modern single-handle faucets use a cartridge with internal seals that degrade over time.
- PossibleCorroded or scored valve seatIf the metal seat the washer presses against is damaged, drips continue even with a new washer.
- PossibleWorn O-ringsSmall O-rings around the stem can dry out and crack, leading to slow leaks.
What to do
- Turn off the water supply to the tub faucet, typically at dedicated stops or the main house shutoff.
- Open the faucet to release any remaining pressure and confirm water is off.
- Remove the handle(s) and unscrew the packing nut or bonnet to expose the stem or cartridge.
- For compression faucets, replace the rubber washer at the bottom of the stem with an exact match.
- For cartridge faucets, pull the cartridge straight out and replace it with the same brand and model part.
- Check the valve seat for grooves or pitting; if damaged, use a seat wrench to replace it or a seat-dressing tool to smooth it.
- Reassemble, turn the water back on slowly, and check for drips at the spout.
Tools and parts
- Adjustable wrench
- Screwdriver
- Seat wrench (if needed)
Faucet washer or cartridgeSearch: “tub faucet washer replacement kit”
When to call a pro
Call a plumber if the valve seat is badly corroded or the faucet brand's parts are hard to identify.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.