A bathtub drain won’t drain most often from hair and soap buildup; clear the stopper, plunge, then snake the drain to restore flow.
A tub that holds water can ruin your day. The fix is usually close to the opening, so you can often get it draining again with basic tools.
You’ll start with the least invasive checks, test after each step, then move deeper only if the water still won’t move.
Why A Bathtub Drain Gets Slow Or Stops
Most tub clogs build up in layers. Hair catches on stopper parts. Soap scum sticks to hair. Oils from skin and bath products make the pipe tacky, so the next bits cling faster.
Hard water scale can narrow the pipe, and thick conditioners can leave a film that grabs hair. A sudden “it stopped overnight” moment is often a partial clog that finally packed tight.
| What You See | Likely Cause | Best First Move |
|---|---|---|
| Water pools, then slowly drops | Hair + soap scum near the stopper | Remove stopper and pull debris |
| Gurgling after draining | Partial clog farther down | Plunge, then snake 2–6 feet |
| Standing water that won’t budge | Tight plug in trap bend | Snake through overflow opening |
| Slow tub and slow sink nearby | Shared line restriction | Stop early and check other drains |
What To Grab Before You Start
Set up first so you can work without scrambling. Protect the tub finish, keep drips contained, and keep small screws from disappearing.
- Gloves On — Hair clogs are slick, and stopper parts can have sharp edges.
- Flashlight Ready — You’ll spot hair wrapped around crossbars and linkage parts.
- Small Screwdriver — Many stoppers use one screw or a small set screw.
- Hair Snake — A plastic barbed strip clears most clogs near the opening.
- Cup Plunger — A flat cup seals well on a tub surface.
- Bucket And Towels — Useful if you pull the overflow plate or linkage.
If your tub is acrylic or fiberglass, avoid pouring boiling water straight in. Use hot tap water instead. Sudden heat can stress finishes and soften some sealants. Keep the water comfortable to touch still.
If you have older metal pipes, skip harsh chemical drain openers. Mechanical clearing is safer and gives you control over what happens inside the line.
Bathtub Drain Won’t Drain With Standing Water
Start right at the drain opening. That’s where most clogs live. Work in order, and test the drain after each step so you stop as soon as the flow returns.
Clear The Stopper And Drain Opening
Tub stoppers trap hair by design. Once you open them, you’ll often see the whole clog sitting in plain sight.
- Lift And Twist — Raise the stopper, turn the knob counterclockwise, then remove the cap to expose the screw.
- Remove The Screw — Unscrew the center screw and lift the stopper body straight up.
- Pull The Plug — Use a gloved hand or tweezers to remove hair and sludge from the drain throat.
- Rinse And Refit — Rinse parts with hot tap water, wipe film off, then reinstall.
If you have a trip-lever on the overflow plate, you may not see a stopper at the drain opening. You can still clear hair from the drain throat, then use a snake through the drain or overflow.
Plunge The Tub With A Real Seal
Plunging breaks up a soft clog and can pull it toward the opening. A poor seal just splashes. Seal the overflow so pressure stays in the pipe.
- Cover The Overflow — Hold a wet rag tight over the overflow opening.
- Add Water — Fill until the plunger cup is fully submerged.
- Press Then Pull — Keep the cup sealed and plunge for 20–30 strokes.
- Test The Flow — Run water for 10–15 seconds and listen for a clear whoosh.
Snake The Drain With A Hair Tool
A plastic hair snake is cheap and often finishes the job. Go slow so you pull the clog out instead of shredding it and leaving pieces behind.
- Feed The Strip — Slide the barbed snake into the drain opening until it stops.
- Twist Lightly — Turn a quarter-turn to hook hair, then pause.
- Pull And Wipe — Pull it out slowly, wipe off debris, then repeat once or twice.
- Flush Hot Water — Run hot tap water for one minute to carry residue away.
Deeper Fixes If The Tub Still Won’t Drain
If the tub is still holding water, the clog is likely in the trap bend or a little farther down. The overflow opening gives a straighter shot into that bend than the drain opening does.
Snake Through The Overflow Opening
This approach is the go-to for a stubborn clog. It also helps if a trip-lever linkage blocks your reach from the drain opening.
- Remove The Overflow Plate — Unscrew the two plate screws and pull the plate out.
- Lift Out Linkage — If a linkage comes out, pull it slowly and keep it over a bucket.
- Feed A Hand Snake — Insert a small drum auger into the opening and aim it downward.
- Work The Cable — Turn while pushing so the tip bites into the clog.
- Pull Debris Out — Retrieve, wipe, then repeat until the cable comes back cleaner.
- Reinstall And Test — Refit the plate, then test with running water.
Fix A Stuck Trip Lever Stopper
Sometimes the pipe is fine and the linkage is the problem. If the lever feels loose, won’t stay up, or the tub drains only when you wiggle it, the plunger may be snagged.
- Check For Hair — Look for hair wrapped around the plunger, spring, or rocker arm.
- Clean The Parts — Wipe off film so parts slide freely.
- Adjust The Rod — Small turns on the threaded rod change how far the stopper travels.
- Confirm Full Lift — Make sure the stopper clears the drain path when set to drain.
Flush Residue After You Clear Hair
After you pull out a hair plug, soap film can still coat the pipe. A gentle flush helps so the next shower doesn’t rebuild the clog right away.
- Run Hot Water — Let hot tap water flow for 2 minutes.
- Add Dish Soap — Add a few drops, then run hot water for 1 more minute.
Clues The Clog Is In A Shared Line
In most homes, when a bathtub drain won’t drain, the blockage sits in the tub branch line. Still, a deeper restriction can show up when more than one fixture acts up.
Check nearby drains. If a sink in the same bathroom is slow at the same time, your tub may not be the only one feeding that line. If a toilet bubbles when you drain the tub, air is fighting past water in a partially blocked pipe.
- Listen For Gurgles — Gurgling after draining can signal a restriction past the tub trap.
- Watch Other Fixtures — Slow drains in more than one place suggest a shared line issue.
- Stop If Water Rises — If water backs up in a shower or sink, stop running water and reassess.
At this point, avoid aggressive tools you’re not used to. A powered auger can damage pipes, and repeated plunging can push dirty water into a sink or shower.
How To Keep A Bathtub Drain Clear
Prevention is boring until you’ve had to pull out a hair rope at 7 a.m. A few small habits can keep your tub draining freely.
- Use A Hair Catcher — Catch hair at the surface so it never reaches the stopper parts.
- Rinse After Washing — Run hot water for 20–30 seconds after shampoo to move residue along.
- Clean The Stopper Monthly — Pull it, wipe it, and remove hair before it packs tight.
- Flush Hot Water Weekly — A weekly hot-water flush helps soften soap scum before it thickens.
If you share a bathroom with long-hair households, this routine is worth it. You’ll spend five minutes a month instead of an hour dealing with standing water.
When It’s Time To Call A Plumber
Call for help when you’ve cleared the stopper, plunged with the overflow covered, and snaked from the drain and overflow with no change. A pro can clear deeper restrictions and check for venting or line issues that a bathroom-only fix won’t touch.
- Multiple Drains Slow Down — This often needs a longer cable or a different access point.
- Water Backs Up Elsewhere — Backup in a shower or sink after a flush is a strong warning sign.
- Leaks Appear — Water under the tub or in the ceiling below needs quick attention.
- Old Pipes Crackle — Cast iron and older galvanized lines can be fragile.
When you call, share what you tried and what changed. If you can, mention whether the clog is constant or comes and goes. That helps the plumber choose the right approach.
If you’re still stuck and the bathtub drain won’t drain after these steps, stop forcing it. Standing water plus repeated attempts can turn a clog into a backup. A professional clear is often the cleanest end to the problem.
