Marketing InformationSioux Chief 883 or 884 Series TKO closet flanges shall be installed where necessary in drainage systems. Closet flange shall be fastened to floor and provide tabs or slots for fastening closet bolts to flange ring. Flange shall have a 3" Sch. 40 hub connection which conforms to ASTM D2665 (PVC) or D2661 (ABS). Knockout cap must come out in one piece and shall be sized larger than drain opening, to prevent it falling down drain line. Closet flange shall hold a standard head test and be UPC listed.