A toilet flange leaking from the bottom is typically caused by a deteriorated, damaged, or improperly compressed wax ring seal sitting between the porcelain bowl horn and the floor flange. Other common causes include a toilet bowl that rocks or shifts because loose floor bolts have broken the wax seal, a cracked plastic or cast-iron toilet flange, or an improperly elevated floor height (such as new tile installation) where the flange sits too low relative to the finished floor level. Callout type="warning" title="Hygiene Warning": Wear heavy-duty rubber gloves and eye protection when handling wastewater and removing a leaking toilet. Verification: Check the base after flushing to confirm if water pools from the wax ring seal.
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