How to Fix a Leaking Bathroom Tub Faucet: A Step-by-Step Guide

Updated November 2026

To fix a leaking bathroom tub faucet, you need to shut off the water, identify the type of faucet, and replace the worn part causing the drip, which is usually a cartridge, washer, or valve seat. Most leaks come from a handful of worn components, and a basic set of tools will handle the job. This guide walks you through the process from start to finish.

Identify the Faucet Type and Source of the Leak

Before you take anything apart, figure out what kind of tub faucet you have. Compression faucets use separate hot and cold handles with rubber washers. Cartridge faucets use a single cylinder inside the body, and ceramic disc faucets use two stacked discs. The type determines which part you will replace.

Shopping for one? See our guide: 4 Best Delta Bathroom Faucet Repair Kit Picks for Every Fix.

Next, confirm where the water is escaping. A drip from the spout when the handle is off usually points to a worn cartridge, washer, or valve seat. Water leaking from around the handle or the base often means a failed O-ring or packing nut seal. Dripping from the showerhead while the diverter is engaged suggests a diverter problem rather than a faucet problem.

Shut Off the Water and Remove the Handle

1. Close the main water supply or the individual shutoff valves for the tub. Turn on the faucet briefly to release any remaining pressure.
2. Place a rag over the drain to prevent small screws from falling in.
3. Pry off the decorative cap on the handle with a flathead screwdriver, then remove the handle screw and lift the handle off.
4. Unscrew the stem or trim plate if your model requires it.

Replace the Worn Part

Compression Faucets

Unscrew the stem with an adjustable wrench. Replace the rubber washer at the bottom and the O-rings on the stem. Check the brass valve seat inside the faucet body; if it is pitted, use a seat wrench to remove it and install a new one.

Cartridge and Ceramic Disc Faucets

Remove the retaining clip or nut that holds the cartridge in place and pull it straight out. Take the old cartridge to a hardware store so you can match it exactly. Apply plumber’s grease to the new O-rings, insert the cartridge with the tabs aligned, and secure the clip.

Reassemble and Test the Faucet

Reinstall the stem or cartridge, the handle, and the decorative cap in reverse order. Slowly turn the water back on at the shutoff valves while the faucet is closed, then check every connection for leaks. Run the water for a minute in each position to confirm the drip has stopped.

Use this checklist before you start:

• Adjustable wrench and flathead screwdriver
• Replacement cartridge, washer, or valve seat matched to your faucet brand
• Plumber’s grease and fresh O-rings
• Rag or towel to protect the tub surface
• Phone camera to photograph the parts before removal

If you are unsure which part to order, Bathroom Tub Faucet Parts: Identify, Repair and Replace Each One explains each component in detail. For a full breakdown of how the repair kits differ, see Bathroom Faucet Repair Kits: How to Fix a Leaky Faucet in 6 Steps.

Recommended Gear

• Plumber’s grease keeps new O-rings from tearing and helps the handle turn smoothly. View on Amazon
• Faucet valve seat wrench lets you remove a corroded seat without damaging the brass body. View on Amazon
• Adjustable wrench grips packing nuts and stems without marring the finish. View on Amazon

Common Mistakes

• Skipping the shutoff step, which leads to water spraying across the bathroom.
• Buying a generic cartridge without matching the brand and model.
• Overtightening the handle screw, which can crack the stem or handle.
• Forgetting to replace the O-rings along with the main part.
• Ignoring a corroded valve seat, which causes the new washer to leak again within weeks.

If the drip returns after a repair, Bathroom Tub Faucet Dripping: How to Find and Fix the Leak covers less obvious causes, such as sediment or mineral buildup. For a full replacement, see Replace Bathroom Tub Faucet: A Step-by-Step Guide for Beginners.

FAQ

Do I need to replace the whole faucet to stop a leak?

Usually not. Most leaks come from a worn cartridge, washer, or valve seat, and replacing that part is far less work than swapping the entire faucet.

How long does it take to fix a leaking tub faucet?

Most homeowners can complete a basic repair in one to two hours once the parts are on hand. Corroded parts or a stuck valve seat may add time.

When should I call a plumber?

Call a licensed plumber if the valve body is cracked, the water supply lines are damaged, or the leak persists after you have replaced the internal parts. A professional can also assess hidden water damage behind the wall.

Conclusion

A leaking tub faucet almost always comes down to a worn cartridge, washer, or valve seat. Shut off the water, identify your faucet type, and replace the failing part with a matched replacement. With the right tools and a careful reassembly, the drip should stop for good.

Related reading

• Bathroom Tub Faucet Leaking: Find the Source and Fix It Yourself
• Bathroom Tub Faucet Dripping: How to Find and Fix the Leak

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