How to Repair a Leaky Bathtub Faucet

Tools and Materials Needed

Before starting the repair, gather these essential items:

• Adjustable wrench
• Phillips and flathead screwdrivers
• Replacement parts (washers, O-rings, or cartridge)
• Plumber's tape
• Plumber's grease
• Clean rags
• White vinegar
• Allen wrench (if needed)
• Penetrating oil (optional)

Preparation Steps

1. Turn off the water supply to your bathtub (usually at the main water valve)
2. Cover the drain with a rag to prevent losing small parts
3. Remove any decorative caps on the faucet handles

Diagnosing the Problem

Before starting repairs, identify your faucet type - most modern faucets use either a cartridge system or traditional compression stems. Detailed diagrams are available on RepairClinic or PlumbingSupply.

Common causes of leaks include:

• Worn rubber washers
• Damaged O-rings
• Corroded valve seats
• Cracked cartridges
• Mineral buildup

Step-by-Step Repair Process

1. Remove the Faucet Handle

• Locate the mounting screw (often hidden under a decorative cap)
• Use a flathead screwdriver to remove the cap
• Unscrew the handle using a Phillips screwdriver or Allen wrench
• Carefully pull off the handle

2. Access the Stem or Cartridge

• Remove the escutcheon plate (decorative plate behind handle)
• Unscrew the packing nut with an adjustable wrench
• Extract the stem or cartridge
• Apply penetrating oil if stuck

3. Replace Damaged Parts

For cartridge faucets:

1. Pull the cartridge straight out
2. Note its orientation
3. Insert new cartridge in exactly the same position
4. Ensure proper alignment before tightening

For compression faucets:

1. Unscrew the stem assembly
2. Replace washers and O-rings
3. Clean valve seat with vinegar
4. Apply plumber's grease to new parts

4. Reassemble the Faucet

1. Reinsert stem or cartridge
2. Tighten the packing nut
3. Reattach escutcheon plate and handle
4. Turn water supply back on
5. Test for leaks

Tips for Success

• Take photos during disassembly
• Organize parts in removal order
• Use plumber's tape on threads
• Don't overtighten components
• Clean all parts thoroughly
• Consider replacing both handles' components

Regular maintenance can prevent future leaks and extend your faucet's life. Consider cleaning mineral deposits annually and replacing washers every few years.

When to Call a Professional

Seek professional help if you encounter:

• Corroded or broken valve seats
• Damaged water supply lines
• Cracked faucet body
• Stripped threads
• Complex shower/tub combination units

For additional guidance, visit DIY Network, This Old House, or The Spruce for detailed tutorials and troubleshooting guides.