For Wood Slab grate Tile or Lone ! Grout or Th inset Mortar 2" adjustable ring Waterproof Membrane Mortar 3/4" plywood on blacking 2 Drain outlet 2 Waste pipe Sub drain flange with adjustable ring Join the two sections of pipe together by Connecting pipe or countermand seal Installation height can be adjusted by foot g sure it is completely level Spread twinset for setting membrane with a 3/16” V notch trowel.