Step 4 · Prepare Subfloor and Drain Pipe

This is the step most people slow down on. Take it one move at a time — there’s no rush, and you can rewind the clip as many times as you need.

Remove the pan from the alcove. Based on the drain location you marked, ensure the drain pipe in the floor is positioned correctly. You will likely need to cut the waste pipe to the correct height. For a solvent-weld drain, the top of the pipe should typically be about 1/2 inch below the top of the subfloor, allowing the drain assembly to slide over it. Use a PVC/ABS pipe cutter or a hacksaw for a clean cut. After cutting, place a piece of tape over the pipe opening to prevent mortar and debris from falling in. Give the subfloor one final cleaning with a shop vacuum.