How to Fix a Leaky Bathtub Faucet: A Complete DIY Guide

A leaky bathtub faucet can be more than just an annoyance—it can waste hundreds of gallons of water and spike your utility bill. If you’ve noticed a constant drip from your tub spout, it’s time to take action. Fixing a leaky bathtub faucet is a relatively simple DIY task that can save you money, conserve water, and restore peace to your bathroom. In this guide, you’ll learn how to fix a leaky bathtub faucet step by step, including tools you’ll need, common causes, and when it might be time to call a plumber.

1. Understanding a Leaky Bathtub Faucet

A leaky bathtub faucet means that water continues to drip from the spout even when the handles are turned off. This usually signals a worn-out internal component, such as a washer, cartridge, or valve seat. Left unresolved, this minor issue can lead to:

• Higher water bills

• Mineral build-up or rust

• Mold and mildew growth

• Damage to walls or flooring

Fixing it early is both eco-friendly and budget-conscious.

2. Why Faucets Leak: Common Causes

Understanding the root of the problem makes it easier to fix. Here are the most frequent causes of a leaky bathtub faucet:

• Worn washers (most common in compression faucets)

• Faulty cartridges (in cartridge-type faucets)

• Corroded valve seats

• Loose or damaged O-rings

• Mineral buildup inside the faucet

Each of these can cause persistent drips or reduced water pressure.

3. Tools and Materials You’ll Need

Before you begin the repair, gather the following:

Tools:

• Adjustable wrench or socket wrench

• Screwdriver (flathead and Phillips)

• Allen key (for set screws)

• Needle-nose pliers

• Plumber’s grease

• Teflon tape

Replacement parts (depends on your faucet type):

• New washer

• Cartridge or stem

• O-rings

Tip: Turn off the water supply before starting the repair!

4. Step-by-Step Guide to Fix a Leaky Bathtub Faucet

Here’s a clear, step-by-step walkthrough for most common faucet types:

Step 1: Shut off Water Supply

Turn off water valves (usually located behind the access panel near the tub).

Step 2: Remove Faucet Handle

Use a screwdriver or Allen wrench to remove the handle. You may need to pry off a decorative cap to reveal the screw.

Step 3: Take Out the Escutcheon Plate

Unscrew the escutcheon plate (the metal trim) and pull it away from the wall.

Step 4: Remove the Faucet Stem or Cartridge

• Use a wrench to unscrew and remove the stem (for compression faucets)

• Or pull out the cartridge (for cartridge faucets)

Step 5: Inspect and Replace Faulty Parts

Check for signs of wear or corrosion on:

• Washers

• Cartridges

• O-rings

Replace the damaged components with exact matches.

Step 6: Apply Plumber’s Grease and Reassemble

Grease the new parts before installing. Reassemble the faucet in reverse order.

Step 7: Turn Water Back On and Test

Restore water supply and check if the leak has stopped.

5. Single vs. Double-Handle Faucets

Both faucet types can leak, but identifying which handle is leaking in a double-handle setup makes repairs more focused and efficient.

6. When to Replace the Faucet Entirely

Sometimes repairing isn’t enough. Replace your faucet if:

• It’s over 10 years old

• You see visible corrosion or rust

• Internal parts are no longer available

• You’re planning a bathroom remodel

Modern faucets are more efficient and easier to maintain.

7. Benefits of Fixing It Yourself

• Save money on plumber fees

• Learn new skills

• Immediate resolution without waiting for help

• Eco-conscious action to prevent water waste

DIY repair is ideal for basic faucet issues that don’t involve plumbing line complications.

8. Security, Reliability, and Safety Considerations

• Always turn off water supply before beginning

• Use Teflon tape on threads to prevent leaks

• Don’t over-tighten parts—can cause damage

• Double-check manufacturer instructions for proprietary components

Always test your repair for drips after reassembling!

9. Costs: DIY vs. Hiring a Plumber

Doing it yourself can save you 70% or more.

10. Pros and Cons of DIY Repairs

Pros:

• Low cost

• Quick fix

• No appointment needed

Cons:

• May require tools

• Some learning curve

• Incorrect repair can cause further leaks

11. Conclusion: Is It Worth Fixing It Yourself?

In most cases, yes! If your leaky bathtub faucet is caused by a simple washer or cartridge issue, fixing it yourself is fast, affordable, and satisfying. With basic tools and this step-by-step guide, you can handle most repairs confidently. However, if the problem persists or involves water pressure or pipe issues, don’t hesitate to call a licensed plumber.

12. FAQs

1. Why is my bathtub faucet still dripping after I replaced the washer?

You might have missed replacing the valve seat or didn’t tighten the parts correctly. Double-check all components.

2. Can I fix a leaky faucet without turning off the water?

No. Always shut off the water supply to avoid flooding or injury.

3. How much water does a leaking faucet waste?

A slow drip can waste up to 20 gallons per day—over 7,000 gallons per year.

4. How do I know which type of faucet I have?

Check the number of handles:

• One handle: likely a cartridge or ball faucet

• Two handles: usually a compression or ceramic disc faucet

5. Can I use universal parts to repair my faucet?

Not always. It’s best to match the brand and model for perfect fit and performance.

6. Should I use plumber’s tape on all fittings?

Use it on threaded connections, but not on compression fittings or parts that don’t require it.