Step 6 · Dry Fit the New PVC Flange

Before final installation, perform a dry fit. Take the new PVC compression flange and insert it into the cleaned cast iron pipe hub. Push it down until the flange base rests on the finished floor. Use a level to check that it sits flat. Confirm that the top surface of the flange is level with or slightly above the finished flooring. If the pipe is too low, you may need a flange extender kit. If it's too high, the project becomes much more complex. This dry fit ensures you won't have height issues after the final installation.

Tools and Materials

LevelFernco 4 in. Service Weight Cast Iron Hub x 4 in. Sch. 40 PVC Compression Coupling P44U-405VEVOR Exhaust Pipe Stretcher Kit 1-5/8 in. to 4-1/4 in. Exhaust Pipe Expander Kit 7 Pcs with Storing Case for Tail Pipe Tube JYLQQCXGJJT876AKDV0