The Most Overlooked Cause of Toilet Leaks (And How to Fix It)
When it comes to toilet leaks, most homeowners immediately think of the tank, the flush valve, or a visible leak from the base. While these are common trouble spots, there’s one surprisingly common culprit that often goes unnoticed: a worn or improperly installed wax seal. This simple donut-shaped gasket sits between the base of the toilet and the floor flange, and when it breaks, it can cause hidden leaks that lead to water damage, mold, and unpleasant odors. The wax seal is designed to create a watertight seal between the bottom of the toilet and the drain pipe. Over time, the seal can dry out, compress, or shift, especially if the toilet rocks slightly due to an unstable or uneven floor. Unlike a tank leak, which is usually obvious, a broken wax seal may not be immediately obvious. Instead, you might smell a musty smell, notice water pooling around the base of the toilet, or see a stain forming on the ceiling of a second-floor bathroom. Fortunately, fixing this problem is simpl...