Sioux Chief 851 Series adjustable cleanout shall be used where necessary in drainage systems. Cleanout shall have a SCH 40 hub connection, which conforms to ASTM D2665 (PVC) or D2661 (ABS). Connection to drainage system shall be made with a solvent weld joint to ABS/PVC pipe. Cleanout cover shall meet applicable load requirements for intended use. Cleanout shall include a slotted, polypropylene cleanout plug, with threaded brass insert to accept cover screw.