Dripping Bathtub Faucet? Here's How to Fix It

Reviewed by HomeMD.ai editorial team · Last updated: July 28, 2026

Understanding the Causes of a Dripping Bathtub Faucet

A dripping bathtub faucet is a common issue that can lead to increased water bills and potential water damage if not addressed. The primary cause is often a worn sealing part inside the handle assembly. For cartridge-style faucets, worn cartridge seals allow water to bypass, while in older compression faucets, a hardened or split rubber seat washer is usually the culprit. Mineral buildup can also score the valve seat, preventing new seals from seating fully.

Identifying Your Faucet Type

Before you begin, it's crucial to identify your faucet type. Cartridge-style faucets are common in homes built after the 90s, especially in the Northeast. If your faucet has a single handle or a two-handle set with a cartridge, replacing the cartridge is likely necessary. For older compression faucets, you may need to replace the rubber seat washer.

Step-by-Step Guide to Fixing a Dripping Faucet

1. Shut off water to the bathroom or the main. Open the tub handle to confirm it is off. You should hear flow stop completely. 2. Remove the handle. Pop the cap, remove the screw, pull the handle straight off. If it resists, wiggle gently, do not pry against tile. 3. Take off the trim and retaining clip or bonnet nut. You will feel the clip snap free or the nut loosen. 4. Pull the cartridge straight out. It should slide with steady force. If stuck, use a Moen Cartridge Puller. Twisting slightly helps break mineral grip. 5. Inspect and flush. Briefly crack the water on for 1 second with the cartridge out to flush grit, then off again. Keep your face clear. 6. Install the new cartridge in the same orientation. You will feel it drop into alignment. If it sits proud, it is rotated wrong. 7. Reassemble trim and handle. Turn water on slowly and test for a smooth, quiet shutoff with no drip.

Tools and Materials Needed

**Tools:** - RIDGID faucet and sink installer or basic adjustable wrench - Moen Cartridge Puller (for stuck cartridges) **Materials:** - Moen 1222 Posi-Temp Replacement Cartridge or Delta RP46074 Cartridge (match your brand) - Danco Faucet Repair Kit for your exact model if using compression style - Oatey Silicone Faucet Grease For product recommendations, visit Home Depot: - [Moen 1222 Posi-Temp Replacement Cartridge](https://www.homedepot.com/s/Moen%201222%20Posi-Temp%20Replacement%20Cartridge) - [Delta RP46074 Cartridge](https://www.homedepot.com/s/Delta%20RP46074%20Cartridge)

Cost Comparison

Option	DIY Cost	Professional Cost
Replace Cartridge	$20 - $60	$150 - $300

Additional Considerations

If the water only drips from the spout when the hot side is used, the hot side washer or cartridge side may be worn. Replace that side only on a two-handle set. If the drip continues with handles removed and stems out, the valve seat may be damaged. Use a Danco Seat Wrench to replace the seat, or call a professional if it will not budge.

How do I know my faucet type?
Look under the handle. A single cylindrical piece is a cartridge. A stem with a screw and rubber washer at the tip is compression.

Why did my new cartridge still drip?
Debris scored the seat or the cartridge is installed rotated. Pull it, flush the body, reinstall aligned.

Can I just tighten the handle more?
No. Over-tightening wears parts faster and can crack trim. The shutoff should feel smooth and stop cleanly.

Do I need plumber’s tape?
Not for cartridges. Use silicone grease on O-rings only. Tape is for threaded pipe joints, not faucet internals.