A toilet wax ring is a circular gasket that creates a watertight and airtight seal between the toilet base and the floor flange. Its main job is to prevent water leaks and sewer gases from escaping every time you flush.

When a wax ring begins to fail, you may notice water pooling around the toilet, unpleasant odors, or a toilet that rocks or feels unsteady. These are signs that the seal has loosened or deteriorated and needs to be replaced.