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Toilet · Repair Copilot

Toilet leaking at the base

Water pooling around the base of a toilet usually means the wax ring under it has failed, letting water escape every flush — though loose closet bolts or condensation can fake it. A base leak that smells is the wax ring, and left alone it rots the subfloor. Show SightLine the base and a 30-year plumber persona helps you tell the causes apart and reseat it right.

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Steps to fix toilet leaking at the base

  1. Dry the floor completely, then flush and watch exactly where water appears — at the base after a flush points to the wax ring; drips from the tank bolts or supply line are a different, easier fix.
  2. Rule out sweating: a cold tank in a humid bathroom drips condensation down the outside and puddles at the base with no seal problem.
  3. Check the two closet bolts at the base — if they're loose, gently snug them a little (alternating sides) to reseat the toilet; do NOT overtighten or you'll crack the porcelain.
  4. If it still leaks at the base, the wax ring is done: shut off the water, empty the tank and bowl, unbolt and lift the toilet straight up, and scrape off the old wax.
  5. Set a new wax ring on the flange, lower the toilet straight down onto it, press to seat, then re-bolt evenly and reconnect the water.
  6. If the floor feels soft or spongy, or the flange itself is broken or below the floor, stop — rotted subfloor and a cracked flange are a licensed plumber's job.

Safety first: if a step calls for gas, a main water or sewer line, a service panel or main breaker, or a sealed refrigerant system, stop and call a licensed pro — Repair Copilot will tell you when you're there.