How to Fix a Slow Bathtub Drain

How to Fix a Slow Bathtub Drain

A slow-draining bathtub is usually caused by a buildup of hair, soap scum, and everyday debris just beneath the surface. Before calling an expensive plumber or resorting to harsh chemicals, you can easily clear most clogs yourself with a few basic household tools.

Follow this step-by-step beginner's guide to get your tub draining smoothly again.

Step-by-Step Guide

1. Remove the Drain Stopper
   Most clogs hide just under the stopper. Depending on your tub’s design, unscrew the stopper counterclockwise, lift and locate a small set screw to loosen it, or simply pull it straight up if it’s a push-pull type.

2. Clear Surface Debris with a Drain Snake (or Wire Hanger)
   Insert an inexpensive plastic drain snake (often called a "zip-it" tool) into the drain opening as far as it will comfortably go. Twist it slightly to catch hair and debris, then slowly pull it out. Alternatively, you can use a straightened wire coat hanger with a small hook bent into the end. Discard any gunk directly into the trash.

3. Check and Clean the Overflow Plate
   If your tub uses a trip-lever stopper (a lever on the overflow plate beneath the faucet), unscrew the faceplate and pull the connected linkage mechanism completely out. Wipe away any trapped hair or grime on the mechanism and set it aside.

4. Flush with Boiling Water
   Boil a kettle of water and carefully pour it directly down the drain in a steady stream. This helps melt away residual soap scum, bath oils, and loosened debris that are clinging to the pipe walls.

5. Apply a Baking Soda and Vinegar Treatment
   Pour 1/2 cup of baking soda directly down the drain, followed immediately by 1 cup of white vinegar. Cover the drain opening with a damp washcloth to force the fizzing action downward through the clog. Let the mixture sit for 15 to 30 minutes.

6. Rinse with Hot Tap Water
   Remove the cloth and run hot tap water for 1–2 minutes to wash away the dissolved buildup. Check the water flow—if the water swirls freely down the drain without pooling, your clog is gone.

7. Reinstall the Stopper and Test
   Replace the clean drain stopper (and overflow plate, if removed). Run the water fully for a minute to perform a final test and ensure everything is draining quickly and working properly.

• Pro Tip: To prevent future clogs, place a silicone or mesh hair-catcher over the drain opening to catch debris before it enters the pipes.