How to Unclog Bathtub Drain

A slow or completely blocked bathtub drain is one of the most common household plumbing problems — and in most cases, it's caused by hair and soap scum buildup that you can clear yourself without calling a plumber. Here's a step-by-step guide from the simplest methods to the most powerful.

What Causes Bathtub Drain Clogs?

• Hair – the #1 cause; hair tangles around the drain stopper and accumulates in the pipe
• Soap scum – combines with hair to form a sticky, dense blockage
• Mineral deposits – hard water buildup narrows the pipe over time
• Body oils and conditioner – coat the pipe walls and trap debris

What You'll Need

• Drain snake or hair removal tool
• Baking soda and white vinegar
• Plunger
• Drain cleaner
• Rubber gloves
• Screwdriver

Recommended: drain snake & hair remover tool set (9-pack), white vinegar, baking soda, sink plunger (2-pack), Max Drain Cleaner, and rubber gloves.

Method 1: Manual Hair Removal (Try This First)

1. Put on rubber gloves.
2. Remove the drain cover (unscrew or lift).
3. Use the drain snake or hair removal tool — insert into the drain, twist to catch hair, and pull out slowly.
4. Repeat until no more hair comes out.
5. Run hot water to test drainage.

This is the most effective method for hair clogs and works immediately. Most bathtub clogs are hair-based and clear completely with this method.

Method 2: Baking Soda + Vinegar + Hot Water

1. Pour ½ cup of baking soda into the drain.
2. Follow with 1 cup of white vinegar.
3. Cover the drain immediately and let the fizzing reaction work for 20–30 minutes.
4. Flush with a full kettle of boiling water (or very hot tap water for acrylic/fiberglass tubs).
5. Test drainage — repeat if needed.

This method works well for soap scum and grease buildup. The fizzing loosens the clog; the hot water flushes it away.

Method 3: Plunger

1. Remove the drain cover if possible.
2. Fill the tub with 2–3 inches of water (enough to cover the plunger cup).
3. Block the overflow drain (the hole near the top of the tub) with a wet cloth to create suction.
4. Place the plunger over the drain and plunge vigorously 10–15 times.
5. Pull the plunger away sharply on the last stroke.
6. Test drainage and repeat if needed.

Plunging works by creating pressure that dislodges the clog. It's most effective for partial blockages.

Method 4: Drain Snake (For Deep Clogs)

1. Insert the drain snake into the drain opening.
2. Feed it in slowly, rotating as you go.
3. When you feel resistance, you've reached the clog — rotate and push to break it up, or hook and pull it out.
4. Withdraw the snake slowly, pulling the clog with it.
5. Flush with hot water.

Method 5: Chemical Drain Cleaner (For Stubborn Clogs)

1. Put on rubber gloves and ensure ventilation.
2. Pour Max Drain Cleaner into the drain according to product instructions.
3. Let sit for the recommended time (usually 15–30 minutes).
4. Flush with cold water.

Important: Never mix chemical drain cleaners with vinegar or bleach. Use one product at a time and flush thoroughly between treatments.

Unclogging in Order of Severity

Preventing Bathtub Drain Clogs

• Use a disposable drain hair catcher — the single most effective prevention tool
• Remove hair from the drain cover after every shower
• Monthly baking soda + vinegar flush to prevent soap buildup
• Avoid washing thick conditioners or hair masks down the drain in large amounts

Frequently Asked Questions

How do I know if the clog is in the drain or further in the pipe?

If the drain snake clears hair but drainage is still slow, the clog may be further in the pipe. If multiple drains in your home are slow simultaneously, the blockage is likely in the main sewer line — call a plumber.

Can I use boiling water to unclog a bathtub drain?

Hot water helps dissolve soap and grease clogs. Use boiling water only for porcelain and cast iron tubs — direct boiling water on acrylic or fiberglass can cause damage. Use very hot tap water instead.

How often should I use a drain cleaner?

Use chemical drain cleaners only when needed for stubborn clogs. Regular use can damage pipes. Monthly baking soda and vinegar treatments are safer for routine maintenance.

Final Thoughts

Most bathtub drain clogs are caused by hair and clear quickly with a drain snake or hair removal tool. Work through the methods in order — start with manual hair removal, then baking soda and vinegar, then plunging, then a drain snake, and finally a chemical cleaner for the most stubborn blockages. A drain hair catcher prevents most clogs from forming in the first place and is the single best investment for drain maintenance.