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Step 7 · Clean Pipe and Floor for New Installation

After the old flange has been removed, the final step is to prepare the area for the new installation. Use a shop vacuum to clean up all debris, including any plastic shavings or metal fragments. Inspect the top edge of the drain pipe. If you cut a PVC pipe, the edge may be rough. Use a deburring tool or a piece of sandpaper to smooth the inside and outside of the pipe's cut edge. This ensures a proper seal for the new flange. For a cast iron pipe, you may need a screwdriver or chisel to gently scrape out any remaining old lead or oakum from inside the hub. The subfloor around the pipe should be clean, dry, and solid. The area is now ready for a new toilet flange to be installed.

Clean Pipe and Floor for New Installation - How to Remove an Old Toilet Flange - Stesso