Bathtub Faucet Leaking: How to Fix

Picture this: You’re finally in bed after a long day, ready to drift off to dreamland, when suddenly, you hear it. 

Drip, drip, drip. 

That pesky leaking bathtub faucet is back, taunting you from the bathroom. Instead of counting sheep, you’re counting drips, and your frustration grows with each one. 

In this comprehensive guide, we’ll cover everything you need to know about fixing that annoying leak and preventing future ones. 

So, grab your toolbox and let’s dive in!

Types of Bathtub Faucets and Their Components

To understand how to fix your leaky faucet, you first need to know what kind of faucet you have. There are three main types of bathtub faucets, each with its own unique components:

Compression Faucets

These are the most traditional type of faucet, with separate handles for hot and cold water. They work by using a rubber washer to compress against a valve seat, controlling the flow of water. Key components include the handle, stem, washer, and valve seat.

Cartridge Faucets

These faucets can have one or two handles and use a cartridge mechanism to control water flow. Cartridge faucets are known for their durability and ease of repair. Key components include the handle, cartridge, and O-ring.

Ball Faucets

Typically found in single-handle faucets, ball faucets use a rotating ball to control water flow and temperature. They are relatively easy to repair but may require specialized parts. Key components include the handle, ball assembly, and various seals and springs.

Why is Your Bathtub Faucet Leaking? Common Causes

Now that you know what kind of faucet you’re dealing with, let’s take a closer look at the most common reasons for leaks. Understanding these causes can help you diagnose and fix the problem more effectively:

Cause #1: Worn-out Washers

Over time, washers can become worn and no longer seal properly against the valve seat, causing leaks. 

This is particularly common in compression faucets. 

The constant friction between the washer and the valve seat when turning the faucet on and off eventually takes its toll, leading to a worn-out washer that can’t create a watertight seal.

Cause #2: Damaged O-rings

O-rings can wear out or become damaged, allowing water to seep through. This is most often seen in cartridge faucets. 

The O-ring is a small rubber or plastic ring that creates a seal between the cartridge and the faucet body. 

Temperature changes, general wear and tear, or improper installation can cause the O-ring to become brittle or cracked, leading to leaks.

Cause #3: Corroded Valves

Corrosion can damage the valve seat, leading to leaks in compression faucets. 

The valve seat is the stationary part of the faucet that the washer presses against to create a seal. 

Over time, mineral deposits and water impurities can cause the valve seat to corrode, preventing the washer from making a tight seal and resulting in a leak.

Cause # 4: Loose or Damaged Cartridge

In cartridge faucets, the cartridge itself can become loose or damaged, leading to leaks. 

A worn-out cartridge can allow water to pass through, even when the faucet is turned off. 

Additionally, if the cartridge is not correctly aligned or installed, it may not create a proper seal, allowing water to leak.

Cause # 5: Worn Ball Assembly or Damaged Seals and Springs

In ball faucets, the ball assembly and its associated seals and springs can wear out over time or become damaged. 

A worn or damaged ball assembly can prevent the faucet from sealing properly, leading to leaks. 

Similarly, damaged seals or springs can cause water to seep through the faucet, even when it’s turned off.

Cause #6: High Water Pressure 

While not directly related to the faucet’s components, high water pressure can contribute to leaks.

Excess pressure puts additional stress on faucet parts, causing them to wear out or become damaged more quickly. 

If you notice that your faucet leaks mainly when other water appliances are in use, consider having your water pressure checked and adjusted if necessary.

Cause #7: Temperature Changes and Expansion

Drastic temperature changes can cause faucet components to expand and contract, affecting their ability to maintain a watertight seal. 

This is particularly true for faucets exposed to freezing temperatures, which can cause parts to crack or become misaligned. 

To prevent temperature-related leaks, ensure that your plumbing is well-insulated and be mindful of sudden temperature changes.

Diagnosing and Fixing Your Leaky Faucet

Now that you know the common causes of bathtub faucet leaking issues, it’s time to roll up your sleeves and get to work! 

Follow these step-by-step instructions to diagnose and fix your faucet, depending on its type:

Compression Faucets

Turn off the water supply to your bathtub by locating the shutoff valves and turning them clockwise.

• Step 1: Remove the faucet handles by unscrewing the decorative cap and then unscrewing the handle screw. Once the screws are off, carefully lift the handle and place it to the side.
• Step 2: Inspect the stem by using a wrench to loosen and remove the packing nut. Carefully remove the stem and examine it for signs of wear or damage.
• Step 3: Replace the washer if it appears worn or damaged. To do this, unscrew the screw holding the washer in place, replace it with a new one, and reassemble the stem.
• Step 4: Examine the valve seat for signs of dirt, damage, or corrosion. If necessary, use a valve seat dressing tool to smooth the surface or replace the valve seat entirely.
• Step 5: Reassemble the faucet by reversing the steps above. Check if the bathtub faucet is still leaking by turning on the water supply. 

Cartridge Faucets

• Step 1: Turn off the water supply to your bathtub by locating the shutoff valves and turning them clockwise.
• Step 2: Remove the faucet handle by loosening the set screw (usually found under a decorative cap) and gently lifting the handle from the cartridge.
• Step 3: Remove the retaining clip or nut that holds the cartridge in place, using a pair of pliers or a wrench.
• Step 4: Pull out the cartridge carefully, using pliers if necessary. Inspect it for signs of wear or damage.
• Step 5: Replace the O-ring by sliding it off the cartridge and installing a new one. Apply a small amount of plumber’s grease to the new O-ring to help it seal properly.
• Step 6: Replace the cartridge if it appears damaged or worn. Insert the new cartridge into the faucet, ensuring it is properly aligned.
• Step 7: Reassemble the faucet by reversing the steps above. Plug the water supply back in and see if the faucet still leaks.

Ball Faucets

• Step 1: Turn off the water supply to your bathtub by locating the shutoff valves and turning them clockwise.
• Step 2: Remove the faucet handle by loosening the set screw and lifting the handle off the ball assembly.
• Step 3: Remove the cap and collar using a wrench or pliers, being careful not to scratch the faucet’s finish.
• Step 4: Remove the ball assembly by lifting it out of the faucet body. Check the ball for any signs of wear or damage.
• Step 5: Replace any damaged seals and springs located underneath the ball assembly. Use needle-nose pliers to remove the old seals and springs, and install the new ones.
• Step 7: Reassemble the faucet by reversing the steps above. Reconnect the water supply and check the faucet for leakage.

Tips and Tricks for Preventing Future Leaks

Now that you’ve successfully fixed your leaky faucet, it’s essential to take steps to prevent future issues. Here are some additional tips to help you maintain your bathtub faucet and minimize the risk of future leaks:

1. Regularly inspect your faucet for signs of wear or damage, and address any issues promptly. By catching potential problems early, you can prevent them from escalating into more significant issues that may cause leaks.
2. Keep your faucet clean by regularly wiping away mineral deposits, soap scum, and grime that can cause components to wear out faster. Use a gentle cleaner and a soft cloth to avoid damaging the faucet’s finish.
3. Be gentle with your faucet when turning it on and off. Excessive force can damage the internal components and cause leaks. Teach family members, especially children, the proper way to use the faucet to minimize wear and tear.
4. Consider upgrading to a higher-quality faucet if you experience frequent leaks. Higher-quality faucets often come with better warranties and are made with more durable materials. Investing in a better faucet can save you time and money in the long run.
5. Install a water pressure regulator if your home has high water pressure. High water pressure can contribute to leaks by putting additional stress on faucet components. A pressure regulator can help maintain a consistent, safe water pressure level, reducing the risk of leaks.
6. Replace faucet components before they fail if you notice signs of wear or damage. Proactively replacing parts like washers, O-rings, and cartridges can help prevent leaks and extend the life of your faucet.
7. Use plumber’s tape on threaded connections when reassembling your faucet. Plumber’s tape, also known as Teflon tape, helps create a watertight seal and prevents leaks around threaded connections.
8. Insulate your pipes and faucets in colder climates to protect them from freezing temperatures. Frozen pipes can lead to cracks and leaks, so it’s essential to ensure your plumbing is well-insulated, especially during the winter months.
9. Regularly check for and repair any plumbing leaks throughout your home. Small leaks can often go unnoticed but can cause significant damage over time. By regularly inspecting your plumbing and addressing any leaks promptly, you can help prevent more extensive issues.
10. Seek professional help if you’re unsure about how to fix a leak or if the problem persists after attempting a repair. Sometimes, it’s best to call in a professional plumber to ensure the issue is resolved correctly and to prevent further damage.

Don’t Let Leaks Drown Your Peace of Mind!

Is your bathtub faucet leaking still causing you headaches, even after following our comprehensive guide? Don’t worry – Fox Plumbing & Heating has got your back! Our expert plumbers specialize in water line repair and replacement in Seattle, WA, and are ready to tackle any plumbing challenge you might face.

Give us a call at (206) 654-4986 to book an appointment. With Fox Plumbing & Heating, you can trust that you’ll receive top-notch service and quality workmanship, so you can get back to enjoying a stress-free, leak-free home.