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A Complete Guide to Fixing a Leaking Bathtub Drain

A leaking bathtub drain can be annoying, causing water damage, mould growth, and higher water bills. Although minor leaks can sometimes be temporarily patched up, it's important to resolve the issue quickly to prevent more expensive repairs in the future.


If you're facing a leaky bathtub drain, follow this guide to fix it yourself. However, if you're uncertain about your ability to handle the repair or if the problem continues, consider contacting a licensed plumber for help.


Modern bathroom with white vertical tiles, a bathtub, black fixtures, and a beige towel. Shelves hold a soap dispenser and candle.

Freestanding Fireclay Style Roll-top Bath, BC Designs


Identifying the Cause of the Leak


Before you dive into fixing the leak, it's important to understand why your bathtub drain is leaking in the first place. Common causes include:


  • Loose Drain Assembly: Over time, the drain assembly (which includes the drain cover and flange) can become loose, causing water to leak around it.

  • Worn-out Seals: The rubber or silicone seal around the drain may degrade or crack, leading to water escaping.

  • Clogged Drain: A clogged drain can put additional pressure on the plumbing, potentially causing leaks.

  • Rusty Pipes: Over time, older pipes, particularly metal ones, can accumulate rust or corrosion, resulting in leaks.


Essential Tools and Materials


Before beginning, ensure you have the following tools and materials on hand to make the repair process go smoothly:


  • Adjustable wrench

  • Plumber’s tape or silicone sealant

  • Pipe cleaner or rag

  • Replacement drain assembly (if needed)

  • Bucket or towels

  • Caulking gun (if using silicone sealant)

  • Plunger (if there's a clog)


Bright bathroom with clawfoot tub, checkered floor, and striped wallpaper. A plant sits on a chair by the window, creating a cozy vibe.

Freestanding Fireclay Style Roll-top Bath, BC Designs


Step-by-Step Instructions for Fixing a Leaking Bathtub Drain


1. Shut Off the Water Supply


Begin by turning off the water supply to the bathtub. You don't want to risk making the situation worse by allowing water to flow while you're working on the drain. Typically, bathtubs have separate shut-off valves for both the hot and cold water lines. If you're unable to find these valves, you might need to turn off the main water supply to your house.


2. Clear the Area Around the Drain


Remove any items around the bathtub that could interfere with your work. This includes bath mats, towels, or shower curtains. Use a towel or bucket to catch any remaining water from the drain area.


3. Inspect the Drain Assembly


Use your hands or a wrench to check if the drain cover and flange are loose. Typically, bathtubs have separate shut-off valves for both the hot and cold water lines. If you're unable to find these valves, you might need to turn off the main water supply to your house. Ensure that the drain cover is properly aligned with the drain pipe underneath.


4. Replace Worn-out Seals


If tightening the drain assembly doesn't solve the issue, you may need to replace the rubber gasket or silicone seal around the drain. As time passes, these seals can wear down and develop cracks, causing leaks.


Take out the old seal and thoroughly clean the surface of the drain and pipe. Then, apply a new seal or use a silicone sealant around the drain area before reattaching the drain assembly.


5. Check for Clogs


Clogs in the drain pipe can contribute to leaks. If water is draining slowly or backing up, you may have a blockage. Use a plunger to attempt to dislodge the blockage. If that doesn’t resolve the issue, try a drain snake or auger to remove the obstruction. Be sure to use these tools carefully to prevent any damage to the pipes.


6. Inspect the Drain Pipes


If there’s still a leak after addressing the drain assembly and seals, the issue could be with the pipes themselves. Check the exposed pipes for any signs of corrosion, cracks, or rust. If the pipes are old and corroded, it might be best to replace them to prevent further issues.


7. Test the Drain


After finishing the repairs, restore the water supply and allow the tub to fill with water. Monitor the drain area closely to see if the leak persists. If you notice any leakage, you may need to adjust the tightness of the drain assembly or apply additional sealant.


A bathroom with a white bathtub, brass fixtures, and green paneling. Checkered floor, art of striped umbrellas above, has a serene mood.

When to Call a Licensed Plumber


Although fixing a leaking bathtub drain can often be a DIY project, there are times when you should call in a professional. If you're uncomfortable with the repair process, lack the necessary tools, or can't find the source of the leak, it’s best to consult a licensed plumber.


A skilled plumber can promptly diagnose the issue and carry out repairs using the proper tools and methods. In addition, if your bathtub drain issue is related to internal plumbing problems such as damaged pipes or a more complicated clog, a licensed plumber will have the expertise to tackle the job.


Remember, attempting a repair that you're not qualified for can lead to further damage and higher repair costs down the road.


Preventing Future Leaks


Once you've fixed the leak, consider taking a few steps to prevent future problems. Regularly clean your drain to remove soap scum, hair, and other debris that could cause clogs. Also, keep an eye on the condition of the seals and gaskets around the drain, as these can wear out over time.


Finally, consider scheduling a routine plumbing inspection with a licensed plumber to ensure your bathtub and pipes remain in good condition.


Conclusion


Fixing a leaking bathtub drain is an achievable task for many homeowners, but it requires patience and the right tools. By identifying the cause of the leak and following the steps outlined in this guide, you can address the problem and avoid further damage to your bathroom.


If the issue seems more complex or you're not confident in handling the repair on your own, don't hesitate to contact a licensed plumber for professional help.


With the right expertise, your bathtub drain can be fixed quickly, leaving you with a leak-free bathroom and peace of mind.


 

Our writers like to find the latest trends in home decor and interiors. We launched the award-winning Seasons in Colour in 2015 and the luxury property and interior decor blog www.alltheprettyhomes.com in 2024 to cover all your interior design, travel and lifestyle inspiration needs.



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