Why your toilet is leaking and how to fix it

How to Repair a Leaking Toilet | Ask This Old House · 3:20 · Video: This Old House · Watch at the source

In short: A dripping toilet is more than a nuisance; it is a waste of water and a potential structural risk. Plumbing expert Richard Trethewey breaks down how to diagnose and repair common leaks.

The video guides viewers through a systematic diagnostic process to identify the source of a leak. It covers three primary areas: the water supply line, where a loose nut or hose issue might be the culprit; the connection between the tank and the bowl, which can leak if bolts are loose; and the floor area, which often indicates a failed wax ring seal.

The footage examines how to fix the flange and toilet wax ring connection when moisture drips onto the lower floor or ceiling. If the flange is too low, options include using a higher wax ring, a foam or plastic seal, or installing flange spacers or a flange insert.

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