How to Unclog a Bathtub Drain (Hair Clogs and Slow Drains)
Most bathtub clogs are hair caught just below the stopper. Clear them in under 30 minutes with a $5 tool, no chemicals, and no plumber. Here is how.
Quick answer: Most bathtub drain clogs are a dense plug of hair sitting within 4-6 inches of the stopper, either wrapped around the stopper mechanism or jammed against the crossbar just below it. Remove the stopper, pull the hair out with a barbed zip-it tool or bent wire hook, flush with hot tap water and a squirt of dish soap, then reinstall. The whole job takes 10-20 minutes and costs $5-8 for the tool if you don’t already own one.
Bathtub drains clog differently than shower drains. The stopper mechanism is more involved, and because bathtub soaking leaves more soap residue than a quick shower, hair clogs in a tub bind tighter and accumulate more buildup around them. The fix is the same basic operation, just with a few more steps to get the stopper out first.
Most people skip that step. They pour something down the drain hoping it’ll dissolve the clog, the drain clears temporarily, and then it slows again in a few weeks. The hair never left. Getting the stopper out and pulling the clog physically is what actually clears it.
What You’ll Need
- Zip-it barbed drain cleaning tool, or a wire coat hanger bent into a hook (a zip-it runs $5-8 at any hardware store)
- Flat-head screwdriver
- Old towel or paper towels (for the mess)
- Small bowl or cup for stopper hardware
- Hot water from the tap
- Dish soap (a few tablespoons)
- Cup plunger (optional, for stubborn clogs)
- Drain snake for anything the plunger can’t reach (see our drain snake guide for technique)
Step 1: Identify Your Bathtub Stopper Type
Bathtubs have four common stopper designs. How you remove it depends on which one you have.
Pop-up / lift-and-turn stopper: A rubber-seated stopper on a threaded post in the drain opening. Twist counterclockwise a few turns; it lifts right out. Most common type in mid-century and newer houses.
Toe-touch stopper: You push it down with your toe to close the drain, push again to open. To remove: with the stopper in the open position, grip it and twist counterclockwise off the post.
Push-and-pull stopper: A knob you push down to close and pull up to open. Remove the knob by unscrewing it counterclockwise from the post, then look for a setscrew to back out with a small flat-head before lifting the post.
Trip-lever / plunger-style stopper: No visible stopper in the drain. You operate the drain with a lever on the overflow plate (the plate with the overflow drain on the wall of the tub, about 6 inches above the tub floor). This type uses a brass plunger inside the overflow pipe to block or open the drain. There’s nothing to remove from the main drain opening because the stopper mechanism is entirely inside the overflow assembly.
Step 2: Remove the Stopper
For lift-and-turn, toe-touch, and push-and-pull types: get the stopper out per the method above. Set the pieces in a small bowl so you don’t lose any hardware. Rinse soap scum off the stopper body before reinstalling later.
For the trip-lever type: remove the two screws from the overflow plate. Slowly pull the overflow plate away from the tub wall, and the entire lift rod and plunger assembly will slide out from inside the overflow pipe. This is where hair collects on trip-lever systems, wrapped around the plunger and the connecting rods. Clean it thoroughly.
Step 3: Pull Out the Hair
Shine a flashlight down the open drain. You’ll see a crossbar about 3-4 inches down. In a clogged tub, there’s usually a felted mass of hair sitting on that crossbar, sometimes dense enough to look like fabric.
The Oatey Zip-It or any similar barbed plastic drain cleaner is the right tool. Slide it past the crossbar, rotate slightly, and pull up slowly. The barbs snag the hair without pushing it deeper. One or two passes usually pulls out the whole clog in a single mass.
A bent coat hanger works too. Make a small J-hook on the end, about 1 inch wide. Fish it past the crossbar, rotate to hook the hair, and pull straight up. It takes a few more passes than the zip-it but it gets there.
Pull everything you can reach. If the drain opens but still drains slowly, run water while watching the drain rate before moving on.
Step 4: Flush With Hot Water and Dish Soap
Once the visible hair clog is out, add two to three tablespoons of dish soap to the drain and follow with the hottest tap water you can run for two to three minutes.
Dish soap acts as a surfactant that loosens the soap scum coating the pipe walls. The hot water (tap-temperature, around 120°F) flushes it out. This step matters because the clog is usually surrounded by soap scum; pull the hair but skip the flush and you leave behind a coating that collects the next batch of hair immediately.
Do not use boiling water in PVC drain pipes. PVC begins to soften around 140°F and boiling water comes out of a kettle at 212°F. Tap water is safe; the kettle is not.
Step 5: Test and Reassemble
Fill the tub with 4-5 inches of water, pull the stopper or open the drain lever, and watch how fast it drains. A clear drain should empty in 30-60 seconds.
If it drains well, reinstall the stopper in reverse order. For screw-in types, turn clockwise until snug, then check that the stopper seats and lifts correctly.
If the drain is still noticeably slow, try the cup plunger before reassembling. Remove any stopper hardware, set the plunger cup over the drain opening, push down firmly, and plunge 10-15 times with short sharp strokes. This can dislodge a clog that sits further down than the zip-it can reach.
Common Mistakes
Not getting the stopper out first. Any approach that leaves the stopper in place fails because the clog is directly beneath it. Pouring baking soda and vinegar down a closed or partially-closed drain circulates around the stopper, not through the clog. Get the stopper out.
Reaching for chemical drain cleaners immediately. Liquid drain cleaners (sodium hydroxide or sulfuric acid products) can partially dissolve soft organic clogs but do nothing to hair, which is structural protein. They also generate heat on contact with water, which can soften PVC pipe fittings over time, particularly at joints. Liquid drain openers with sodium hydroxide or sulfuric acid are corrosive enough that the EPA classifies them as household hazardous waste requiring special disposal. They also generate significant heat on contact with water, which softens PVC pipe fittings over time. A $5 zip-it tool outperforms a $12 bottle of drain cleaner on actual hair, without the pipe and disposal issues.
Forgetting about the trip-lever overflow assembly. If you have a trip-lever stopper and you clear the main drain opening without finding much hair, check the overflow assembly. The plunger and lift rods inside the overflow pipe collect hair just as the main drain does. You won’t find any obstruction in the visible drain because the blocking mechanism is 12 inches up the wall.
Skipping the soap flush. Soap scum on the pipe walls is the main reason a freshly cleared drain reclogs quickly. The hot water and dish soap flush takes two minutes and extends the time between cleanings from weeks to months.
When to Call a Pro
Most bathtub clogs clear with the steps above. A few situations point to something beyond the tub drain itself:
- Two or more drains in the house are slow at the same time (tub, toilet, kitchen sink): that’s a main drain line issue, not a stopper issue
- The toilet gurgles when the tub drains: the drains share a partial blockage or a venting problem further down the line (see why is my toilet gurgling)
- The tub fills with water when you run the sink in the same bathroom (shared drain line)
- A drain snake goes in 6+ feet without finding a clear path: a partial obstruction at that depth needs professional equipment
For a single slow tub with no other symptoms, the steps above handle it.
FAQ
How often should I clean my bathtub drain? Every 3-4 months is a reasonable maintenance interval for most households. If two or more people with long hair use the tub regularly, monthly is more realistic. A mesh hair catcher that sits in the drain opening costs $3-5 at hardware stores and catches most hair before it reaches the drain pipe; with one in place, cleaning intervals stretch to once or twice a year.
What is the best tool for pulling hair out of a bathtub drain? A barbed plastic drain cleaning tool (Zip-It is the common brand, Oatey and Cobra make similar versions) is the most effective option. The barbs catch dense hair without pushing it further into the pipe, and the flexibility lets it bend past the crossbar. They run $5-8 and last indefinitely. A bent coat hanger works but takes more passes to clear the same clog.
Will baking soda and vinegar unclog a bathtub drain? For soap scum and mild residue buildup, the fizzing reaction helps loosen what’s on the pipe walls. For a true hair clog, it doesn’t work. Hair is structural protein that neither acid nor base dissolves at household concentrations. If you’ve already removed the hair manually, the baking soda and vinegar flush serves as a useful rinse but not a substitute for pulling the clog.
How do I know if the clog is in the tub drain or the main line? If only the bathtub drains slowly and everything else in the house works normally, the problem is local to the tub drain. If the kitchen sink is also slow, the toilet backs up, or you hear gurgling from other drains when the tub runs, the blockage is in a shared section of pipe downstream.
Can I use a plunger on a bathtub drain? Yes. Remove the stopper first so the drain is fully open, then use a cup plunger, not a flange plunger. Place it directly over the drain, press firmly to seal, and plunge with 10-15 firm strokes. Plugging the overflow opening with a wet rag while you plunge improves suction significantly. The plunger works best as a follow-up after pulling visible hair, not as a first step.
Why does my bathtub clog faster than my shower? Two reasons. Bathtub soaks leave more soap residue than shower rinses, coating the pipe walls faster and giving hair more to bind to. And most bathtub stopper mechanisms have more hardware in the drain path than a simple shower strainer, creating more surfaces for hair to tangle around. The Uniform Plumbing Code requires horizontal drain lines to slope at least 1/4 inch per foot; a correctly installed tub drain shouldn’t hold standing water when open, but if yours does, the drain slope may be off and no amount of clearing will fix it long-term.
My tub has a pop-up stopper and I can not get it unscrewed. What now? The threads can seize with mineral deposits, especially in hard-water areas. Spray the post with a penetrating oil like WD-40, wait 10 minutes, then try again. If it still won’t turn, look for a small setscrew on the side of the post just below where it meets the stopper body. Backing that screw out usually frees the stopper even when the threads are seized.
Is it safe to use a wire coat hanger in a bathtub drain? For PVC and ABS pipe, a wire hook without sharp burrs is fine. Don’t gouge the pipe walls aggressively. For old cast iron drains, the interior surface is already rougher and wire is still acceptable. The main risk is pushing the clog deeper instead of hooking it; small slow rotations while inserting, then pull straight up. A commercial zip-it tool does the same job with less risk of pushing the clog down.