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A PVC or ABS flange is solvent-welded (glued) to the drain pipe, so it must be cut out. The safest and most professional method is to use a special drill bit called an inside pipe cutter or flange cutter. Attach the bit to your drill. Carefully lower the cutter into the flange until the cutting edge is positioned just below the bottom of the flange hub, inside the drain pipe. Ensure it is level. Start the drill slowly and apply steady, even pressure, allowing the cutter to slice through the pipe from the inside out. Once the cut is complete, the flange will be free from the drain pipe and can be lifted away. Be extremely careful not to cut too low, as this will shorten the drain pipe and complicate the new installation.

You're viewing a step from: How to Remove an Old Toilet Flange

Intermediate

30 minutes

2/4 Inventory

This guide provides comprehensive, step-by-step instructions for removing an old toilet flange. The process includes preparing the workspace, removing the existing toilet, cleaning the area, and then detaching and removing the flange from the drain pipe and subfloor. Specific techniques for both common PVC/ABS and more challenging cast iron flanges are detailed.

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Frequently Asked Questions

How difficult is it to remove an old toilet flange, and how long should I expect it to take?

Removing an old toilet flange is generally considered an intermediate-difficulty DIY project. Expect it to take 2-4 hours, though this can vary significantly based on your experience, the flange material (cast iron is more challenging), and how easily the old fasteners come out. Patience and the right tools are key.

What are the essential safety precautions I need to take when removing a toilet flange?

Safety is paramount for this project. Always wear safety glasses and work gloves to protect against debris and sharp edges. Ensure the water supply is shut off and the toilet is completely drained before beginning. If working with cast iron, be cautious of flying fragments and use appropriate hearing protection when chiseling.

Do I absolutely need specialized tools like an inside pipe cutter or a cold chisel and sledgehammer for this project?

Yes, for PVC/ABS flanges, an inside pipe cutter (like The Plumber's Choice 1242R) is highly recommended to make a clean, safe cut without damaging the main drain pipe. For cast iron flanges, a cold chisel (e.g., Dasco Pro G419) and sledgehammer (like Estwing MRF3LB) are often necessary to break the brittle material without damaging the subfloor or surrounding pipe.

What's the most common mistake DIYers make when removing a toilet flange, and how can I avoid damaging the drain pipe?

The most common and costly mistake is damaging the drain pipe itself while removing the flange. To avoid this, always exercise caution and precision. When cutting PVC/ABS, ensure the inside pipe cutter is properly adjusted to cut only the flange. When breaking cast iron, direct your force carefully with the chisel to fracture the flange, not the underlying pipe or subfloor.