Sioux Chief 861 Series SquareMax™ floor sink shall be used where necessary in drainage systems. Floor sink shall be molded from impact-modified PVC with Schedule 40 hub connection which conforms to ASTM D2665. Floor sink shall show no significant distortion at water temperatures up to 180 deg F. Strainer shall be heel-proof and shall meet all applicable load requirements for intended use. Floor sink shall be designed with a concrete anchor flange for solid installations. Sump area shall have smooth, pitched inner surfaces for quick and complete drainage. Designed in accordance with ASME A112.6.7-01.