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Q.

How to Repair a Broken Toilet Flange?

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Summary
To repair a broken toilet flange, first remove the toilet and evaluate the damage. If only a portion of the flange is cracked, use an extender or flange repair ring to strengthen it. Clean the old flange, secure the repair ring with screws, and ensure it's level. If a flange is badly damaged, replace it completely by removing the old one and installing a new one. After the toilet has been repaired, reinstall it with bolts and tighten them uniformly to avoid wobbling.
0 2025-11-28T08:50:43+00:00

The very first step in how to repair a broken toilet flange is to identify the problem. If you have tried securing the toilet to the floor bolts but are still unable to secure it, your toilet may be shaking. You probably have a broken toilet flange, also known as a closet flange. Other warning signs that could point to a damaged flange include:

  1. Leaks underneath the toilet are visible.

  2. The toilet's surroundings have soft flooring.

  3. The ceiling directly beneath the toilet has water stains on it.

How to Fix a Broken Toilet Flange?

  1. First, turn the valve clockwise to cut off the toilet's water flow. 

  2. Flush the toilet after removing the tank's lid. 

  3. To temporarily solidify the leftover water, use a water absorber. 

  4. Remove the 3/8" compression nut and the water supply line from the toilet fill valve. 

  5. If your toilet is caulked to the bathroom's finished floor, use a razor knife to score the caulking all the way around the toilet base.

  6. Put a protective covering on the floor of the bathroom. 

  7. Now, the caps covering the bolts and washers can be removed by inserting a flat-head screwdriver. 

  8. Using an adjustable wrench, remove the nuts and washers from the bolts at the toilet foundation. 

  9. Take a putty knife to remove the old wax seal from the toilet's base and flange. 

  10. Also, take out any flange parts that are rusted or damaged. 

  11. Next, generously coat the top of the current flange with 100% silicone sealant. 

  12. If the ring slots are still in place, insert the new bolts into them.

  13. For proper bolt alignment, press the repair ring down into the appropriate position. 

  14. Use the proper screws and anchors to fasten the repair ring to the subfloor. 

  15. You must also use the provided fasteners to secure new bolts to fix the ring. 

  16. Remove any extra silicone, and give it some time to dry. 

  17. Cover the repair ring with a fresh wax ring seal. 

  18. Use bolts to reinstall the toilet. 

  19. Put all the nuts and washers back where they belong. 

  20. Finally, secure the bolts lightly and connect the toilet supply.

The extent of the flange's damage determines the repair technique to be used. This is all about how do you fix a broken toilet flange.

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