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How to unclog a toilet

We'll clear the toilet using a flange plunger, then a toilet auger if needed—no harsh chemicals.

How-to · Home plumbing
10–30 min
What you'll need
  • Flange plunger (for toilets—has a rubber extension that fits in the drain)
  • Toilet auger (closet auger) if the plunger fails
  • Bucket (to add or remove water)

Use this guide when:Toilet is clogged—water does not drain or backs up when flushed.

First checks

  • Do you have a flange plunger (not a cup plunger)?
  • Is the water level high enough to cover the plunger cup?
  • If overflowing, bail some water first.

Quick answer

  • Use a flange plunger (not a cup plunger) for toilets—the flange fits inside the drain opening.
  • Fill the bowl with enough water to cover the rubber cup; pump firmly 10–15 times with a tight seal.
  • If the plunger fails, use a toilet auger to reach the blockage in the trap or drain line.
  • Never use chemical drain cleaners in toilets—they can damage seals and are ineffective on solid clogs.
  • Call a plumber if the auger hits a hard stop or water backs up from other fixtures.
Quick triage — pick your path

Get started

Choose the option that matches what you see. You can jump straight to that section.

Steps

Goal: Clear the clog using a flange plunger, then a toilet auger if needed.

  • Check the water level. Add water from a bucket if the bowl is nearly empty, or bail some if overflowing.
  • Good: Water level covers the plunger cup. Proceed to Try the plunger.
  • Bad: Bowl is overflowing—bail first, then proceed.

Try the plunger

Goal: Use a flange plunger to clear soft clogs in the toilet trap.

  • Insert the flange into the drain opening. Push down firmly to create a seal.
  • Pump 10–15 times forcefully. Pull the plunger away quickly. Watch the water.
  • Good: Water swirls and drops; clog is clear. Proceed to Verification.
  • Bad: Water still pools—proceed to Toilet auger.

Flush to verify

Goal: Confirm the clog is clear.

  • Press the flush handle. The water should drain completely and refill to normal level.
  • Good: Full, clean flush. Proceed to Verification.
  • Bad: Slow drain or backup—proceed to Toilet auger.

Toilet auger

Goal: Reach blockages in the trap or drain line that the plunger cannot clear.

  • Insert the toilet auger cable into the bowl. Feed it toward the drain until you feel resistance.
  • Crank the handle to break through or hook the clog. Retract slowly. Flush to verify.
  • Good: Toilet drains normally. Proceed to Verification.
  • Bad: Auger hits a hard stop—see When to get help.

When to get help

Call a plumber if:

  • The auger hits a hard stop that will not budge (could be a pipe fitting or main-line blockage).
  • Water backs up from other fixtures (suggests main-line blockage).
  • You smell sewage (possible main-line or vent issue).
  • The toilet clogs repeatedly (may need a drain line inspection).

Verification

  • Flush the toilet twice. Water should drain completely each time.
  • No gurgling or slow refill.
  • Bowl refills to the normal water line.

Reviewed by Blackbox Atlas

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