What causes a toilet to leak from the base when flushing?

A toilet leaking from the base when you flush usually means the wax ring seal at the floor flange has failed. Loose closet bolts, a cracked toilet base, or a misaligned flange can also cause seepage. If the clog is in the sewer or drain, flushing can force water out at the base. We provide fast, on-site diagnosis and repairs for leaking toilets, with per-job, up-front pricing. We also handle related drain cleaning if a blockage is the root cause.

Quick checks:

• Gently snug the two floor bolts.
• Look for cracks at the base.
• Avoid flushing and shut off water if leaking is active.

Updated: 2025-12-24

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