Sioux Chief 821 series shower pan drain shall be used where necessary in drainage systems. Drain shall have a beveled fl ashing base adapter with mounting holes for subfl oor installation. Strainer shall meet all load and fl ow requirements for installations in shower areas. Invertible clamping collar shall fasten to drain body with four screws that thread into brass inserts. Drain body shall have a 2 Sch. 40 hub connection and connect to DWV pipe via solvent weld joint. Designed in accordance with ASME A112.18.2-2005 / CSA B125.2-05.