KERDI-DRAIN KIT PVC 2" / TILEABLE COVERING SUPPORT specifically designed to allow connections to Schluter-KERDI or other load-bearing, bonded waterproof membranes. onsists of a drain casing and fully adjustable grate assembly or covering support to which tile is applied. The grate assembly accommodates a wide range of tile thicknesses and allows lateral and tilt adjustment as well. simple connection to standard drain outlets makes KERDI-DRAIN suitable for new construction and renovation.