Fusion Bonded Epoxy Coated Ductile Iron Flex Check Valve. Uses a unique rubber coated flexible disc which allows suspended solids and debris to past through while still providing an economic check valve to prevent backflow. Allows for a large flow rate and little head loss/pressure drop across the valve due to the full bore design and recess for the disc to sit in when fully open. Quiet operation making it suitable for domestic and commercial applications such as hospitals, hotels & unit blocks.