Quick answer
A toilet that will not flush is either not releasing water from the tank or cannot empty the bowl. Lift the tank lid and press the handle: a slack or detached chain, a supply valve that is partly closed, or a fill level set too low are the usual tank problems, and a bowl that rises and drains slowly is a clog. HomeAdvisor puts typical toilet repairs at $150–$391. Call (888) 217-6781 to reach a plumbing company taking calls in your ZIP.
Follow the short menu, then your 5-digit ZIP. The line goes quiet for a few seconds while it connects; stay on. If it does not connect, call once more: companies taking calls change minute to minute.
Written & reviewed by Marcus ReedIICRC WRT
Reviewed November 3, 2026· Next review May 2027
A toilet that will not flush has one of two problems: the tank is not releasing water into the bowl, or the water goes in and the bowl cannot empty. Lift the tank lid and press the handle. What you see in the next five seconds tells you which one you have.
Look Inside the Tank
| What you see | Likely cause |
|---|---|
| Handle moves freely, flapper does not lift | Chain came off the handle arm, or the arm broke |
| Flapper lifts, closes at once, weak flush | Chain too long, or the flapper is waterlogged |
| Tank is empty or only half full | Water supply valve partly closed, or a failing fill valve |
| Tank empties well, bowl rises and drains slowly | Clog in the trap or the drain line |
| Bowl empties slowly in every toilet in the house | Main sewer line clog |
Check These First
- 1Reattach or shorten the chain. It should have about half an inch of slack with the flapper closed.
- 2Open the supply valve fully. It is the oval handle on the wall behind the toilet. Turn it counterclockwise until it stops.
- 3Watch the fill level. The water should stop about an inch below the top of the overflow tube. Lower than that gives a weak flush; most fill valves have a float you can raise.
- 4Plunge a slow bowl. Use a flange plunger (the kind with a sleeve on the bottom) and 10 to 15 firm strokes. See toilet clogged and won't unclog if that fails.
Talk to a plumber about this
One call reaches a plumbing company taking calls in your ZIP.
When It Is More Than One Fixture
If the shower or tub drain gurgles or backs up when you flush, the clog is past the toilet, in the branch drain or the main line. Stop flushing; more water has nowhere to go but out of the lowest drain. See main sewer line clog.
What a Repair Costs
HomeAdvisor puts typical toilet repairs at $150 to $391, about $271 on average. Fixr puts simple jobs, such as a flapper, chain or fill valve, at $60 to $200. The toilet repair page has the table and sources.
When to Call
Call once the chain, the supply valve and a plunger are ruled out, or right away if more than one drain is backing up. (888) 217-6781 connects you to a plumbing company taking calls in your ZIP. Follow the short menu, enter your 5-digit ZIP and stay on while it connects; if it does not connect, call once more, because the companies taking calls change minute to minute.
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Frequently Asked Questions
Why does my toilet not flush when I push the handle?
Most often the chain between the handle arm and the flapper has come off or is too slack, so the flapper never lifts. Lift the tank lid, reattach it and leave about half an inch of slack.
Why is my toilet flush weak?
A tank that does not fill high enough, a flapper that closes too soon, or a partial clog. Check the water stops about an inch below the overflow tube and the supply valve is fully open.
How much does it cost to fix a toilet that won't flush?
HomeAdvisor puts typical toilet repairs at $150–$391, about $271. Fixr puts simple jobs such as a flapper, chain or fill valve at $60–$200.
Sources
Methodology: How we source and verify data · Report an error
Disclaimer: HearthDry is an independent educational resource. This article is for informational purposes only and does not constitute professional, legal, or insurance advice. Consult licensed professionals before making decisions about your property or insurance claims.