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Hands in blue nitrile gloves repairing a toilet inside an open white tank, screwdriver and towel on the floor

Why Your Toilet Keeps Running After You Flush (and How to Fix It in Under 30 Minutes)

A handyman guide to diagnosing and fixing a constantly running toilet. 9 times out of 10 it is a worn-out flapper – a $4 part and 20-minute fix.