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Plumbing
Why won't my toilet flush?
Toilet not flushing? Here are the most common causes and exactly what to do — plus when to call a plumber.
Most common causes
- 01Flapper valve not sealing
- 02Low water level in tank
- 03Clogged drain or trap
- 04Broken lift chain
- 05Partial main line blockage
What to do right now
1
Check the water level in the tank — it should be 1 inch below the overflow tube2
Check that the lift chain is connected to the flapper3
Try a plunger if the bowl is full and not draining4
Do not flush repeatedly if the bowl is full — it will overflowWhen to call a professional
Call a plumber if: the toilet still won't flush after checking the chain and flapper, water is backing up in other drains when you flush (main line issue), or the toilet rocks or has visible damage at the base.
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