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How to Repair a Rocking Toilet

Ask This Old House plumbing and heating expert Richard Trethewey shows host Kevin O’Connor several ways to troubleshoot a toilet that wobbles

Steps:

  1. Don’t overtighten the closet bolts, as the toilet can crack.
  2. Ensure the closet flange is secured to the subfloor.
  3. Use plastic toilet shims at the low points to keep the toilet level.

Resources:
All of the items Richard demonstrated, including closet flanges, wax rings, closet bolts, and toilet shims are available at home centers and plumbing supply stores.