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.
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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.
Frequently Asked Questions
How can I ensure the drain pipe is cut perfectly flush with the leveled subfloor?
To achieve a perfectly flush cut, keep the oscillating multi-tool blade pressed firmly and consistently against the scrap metal guide as you slowly rotate around the pipe. Let the tool's oscillations do the cutting, avoiding excessive force which can cause an uneven cut.
What safety precautions should I take when using an oscillating multi-tool for this task?
Always wear safety glasses to protect against flying plastic debris and hearing protection due to the tool's noise. Maintain a firm grip on the tool and ensure no body parts are in the cutting path.
What if I accidentally score or damage the subfloor with the blade?
The scrap metal guide is essential to prevent subfloor damage. If minor scoring occurs, it's often not critical as the area will typically be covered by a toilet flange or flooring. For deeper damage, consider a subfloor patch before further installation.
Are there any alternative tools I can use if I don't have an oscillating multi-tool with a flush-cut blade?
While the oscillating multi-tool is highly recommended for its precision and flush-cutting ability, you could potentially use a fine-tooth hacksaw blade by hand. However, it will be much harder to achieve a perfectly level and clean cut, and you'll need to be extra vigilant with your guide.
How to Remove an Old Toilet Flange
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Step 1: Shut Off Water Supply and Empty the Toilet
Step 1: Shut Off Water Supply and Empty the Toilet
Step 1: Shut Off Water Supply and Empty the Toilet
Step 2: Disconnect and Remove the Toilet
Step 2: Disconnect and Remove the Toilet
Step 2: Disconnect and Remove the Toilet
Step 3: Clean and Inspect the Old Flange
Step 3: Clean and Inspect the Old Flange
Step 3: Clean and Inspect the Old Flange
Step 4: Remove Flange-to-Floor Fasteners
Step 4: Remove Flange-to-Floor Fasteners
Step 4: Remove Flange-to-Floor Fasteners
Step 5: Remove PVC/ABS Flange
Step 5: Remove PVC/ABS Flange
Step 5: Remove PVC/ABS Flange
Step 6: Remove Cast Iron Flange (Alternative)
Step 6: Remove Cast Iron Flange (Alternative)
Step 6: Remove Cast Iron Flange (Alternative)
Step 7: Clean Pipe and Floor for New Installation
Step 7: Clean Pipe and Floor for New Installation
Step 7: Clean Pipe and Floor for New Installation
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