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Fix a bathtub drain that is clogged

We'll remove the overflow plate, snake the drain, and clear hair and soap buildup—or tell you when to call a plumber.

Troubleshooting · Home plumbing
15–30 min
What you'll need
  • Flathead and Phillips screwdrivers
  • Needle-nose pliers
  • Drain snake (hand-crank)
  • Cup plunger
  • Baking soda and white vinegar (optional)
  • Towels
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Steps

Goal: Confirm the bathtub drain is clogged, then clear hair and soap buildup.

  • Run the tub faucet at full flow for 30 seconds. Check that water pools in the tub or drains very slowly.
  • Good: Water pools or drains slowly—clogged. Proceed to Remove overflow plate and debris.
  • Bad: Water drains freely—no clog. Check another fixture or see How to unclog a drain for general drain clearing.

Remove overflow plate and debris

Goal: Clear the drain path by removing the overflow plate and stopper linkage, then pulling out visible hair and soap.

  • Remove the overflow plate (the rectangular cover near the top of the tub) by unscrewing the screws.
  • Pull out the stopper linkage—the rod and pivot that connect the overflow to the drain. Look for hair wrapped around the linkage.
  • Pull out hair and debris with needle-nose pliers. Run water and check if flow improves.
  • Good: Drain clears. Proceed to Verification.
  • Bad: Still clogged—proceed to Snake the drain.

Plunger and hot water

Goal: Try a plunger and hot water before snaking.

  • Use a cup plunger—not a flange plunger—for the flat tub drain. Block the overflow opening with a wet cloth so the plunger can build pressure.
  • Fill the tub with enough water to cover the rubber cup. Press the plunger down to form a seal and pump firmly 10–15 times.
  • Or pour very hot tap water into the drain (for PVC pipes, do not use boiling). Or pour half a cup of baking soda, then half a cup of vinegar, wait 15–20 minutes, flush with hot water.
  • Good: Drain clears. Proceed to Verification.
  • Bad: No change—proceed to Snake the drain.

Snake the drain

Goal: Break through clogs deeper in the pipe with a drain snake.

  • Feed a hand-crank drain snake into the drain opening—or through the overflow opening if the main drain is too tight—until you feel resistance.
  • Crank the handle clockwise to bore through or hook the clog. When the snake moves freely, pull it back slowly. Run water and verify the drain flows at full speed.
  • Good: Drain flows at full speed. Proceed to Verification.
  • Bad: Snake hits a hard stop—stop. That could be a pipe fitting. See When to get help.

When to get help

Call a plumber if:

  • The snake hits a hard stop that will not budge (could be a pipe fitting or main-line blockage).
  • Water backs up from multiple fixtures (e.g. toilet, sink) when you run the tub.
  • You smell sewage (possible main-line or vent issue).

A plumber has longer snakes and can scope the pipe to locate the problem. For other plumbing fixes, see Fix a leaking faucet or Fix a toilet that runs.

Verification

  • Run the tub faucet at full flow for 60 seconds. Water should drain without pooling.
  • Confirm no debris remains at the drain opening.
  • Reinstall the overflow plate and stopper. Repeat the flow test after 24 hours to confirm the clog has not reformed.

Escalation ladder

Work from the device outward. Stop when the problem is fixed.

  1. Confirm symptom Verify the bathtub drain is blocked or drains slowly.
  2. Remove overflow plate and debris Pull out hair and soap from the stopper linkage.
  3. Plunger and hot water Try a plunger, then hot water or baking soda and vinegar.
  4. Snake the drain Feed the snake through the drain or overflow opening.
  5. Call a plumber Snake hits hard stop, multiple fixtures back up, or sewage smell—call a plumber.

What to capture if you need help

Before calling support or posting for help, have these ready. It speeds everything up.

  • Whether removing debris helped
  • Snake results (debris pulled out or hard stop)
  • Steps already tried

Is the bathtub drain blocked or draining slowly?

Run the tub faucet for 30 seconds. If water pools or drains very slowly, the drain is clogged.

Run the tub faucet at full flow for 30 seconds. Good: water pools or drains slowly—clogged. Bad: water drains freely—no clog.

Yes No

You can change your answer later.

Did removing the overflow plate and debris clear the drain?

Remove the overflow plate and pull out hair from the stopper linkage.

Remove the overflow plate and stopper linkage. Pull out hair and soap with needle-nose pliers. Run water. Good: drain clears—you may be done. Bad: still clogged—try plunger, then snake.

Yes No

You can change your answer later.

Did the plunger or hot water clear the drain?

Use a cup plunger with overflow blocked, or pour hot water or baking soda and vinegar.

Block the overflow with a wet cloth. Use a cup plunger, fill tub to cover the cup, pump 10–15 times. Or pour very hot tap water (for PVC, not boiling) or baking soda and vinegar. Good: drain clears. Bad: still clogged—snake the drain.

Yes No

You can change your answer later.

Did the drain snake clear the clog?

Feed the snake through the drain or overflow opening until resistance.

Feed a drain snake into the drain or overflow opening until you feel resistance. Crank clockwise to bore through or hook the clog. Pull back slowly. Run water. Good: drain flows at full speed. Bad: snake hits hard stop or still clogged—call a plumber.

Yes No

You can change your answer later.

Drain is clear

Water drains freely. Reinstall the overflow plate and stopper. Install a hair catcher to prevent future clogs.

Done

Call a plumber

Call a plumber if: the snake hits a hard stop; water backs up from multiple fixtures; or you smell sewage. Those suggest a main-line blockage.

Done

Reviewed by Blackbox Atlas

Frequently asked questions

Why do bathtub drains clog?
Hair and soap are the main causes. Hair catches on the stopper linkage and pipe walls; soap mixes with hair and forms a sticky mass. Removing the overflow plate and snaking usually clears it.
Can I fix a clogged bathtub drain myself?
Yes. Remove the overflow plate and pull out hair and soap. Snake through the overflow opening or the main drain to reach deeper clogs. Hot water or baking soda and vinegar can loosen soap buildup. Avoid harsh chemical drain cleaners.
When should I call a plumber for a clogged bathtub drain?
Call a plumber if the snake hits a hard stop that will not budge, water backs up from multiple fixtures, or you smell sewage. Those suggest a main-line blockage.

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