Sioux Chief 875 Series cleanout bushing shall be used where necessary in drainage systems. Cleanout shall include an internally threaded body designed for solvent weld connection inside of SCH 40 ABS/PVC pipe. Slotted, flush-fit cleanout plug shall be removable and provide access to DWV system for inspection/maintenance. Cleanout plug shall include a 1/4-20 threaded brass insert for optional attachment of cover. Body and plug threads shall comply with ASTM F1498-12.