Sioux Chief 827 or 828 series shower module drain shall be used where necessary in drainage systems. Shower drain shall have an outer locknut design with compression gasket connection for Sch. 40 ABS/PVC pipe. Snap-in strainer shall meet all applicable load and flow requirements for intended use. Designed in accordance with ASME A112.18.2-2005/CSA B125.2-05.