ZOELLER CHECK VALVE UNION *Prevents back flow of water and sewer gas *Full flow *Extra wide flapper hinge prevents hinge stress *Vertical or horizontal line *Slips over ABS, PVC, steel or copper pipe *Flexible neoprene unions *Includes clamps, unicheck *Rated at 25 PSI pressure (57 ft. of head) 130 deg. F max. *Bulk *2" x 2" Cast Iron Slip x Slip