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Sioux chief 889 series full flush closet flanges shall be used where necessary in drainage systems. Flange shall allow 1.5 inch offset in any direction and have a full-swivel, corrosion-proof stainless steel ring, with sufficient holes for securing to floor and slots for inserting closet bolts. Flange shall have an offset inner diameter area properly sized to allow full 3 inch spherical-flow for complete drainage and clog resistance. Flange shall have a 3 inch sch. 40 hub connection which conforms to sat D2665 (PVC) or D2661 (ABS). closet flanges shall be upc listed. Always fasten closet flanges to the floor.