A backwater valve mounted on a vertical drain pipe is a comfortable, cheap and often the only way of protecting a building against flooding. The valve has successfully passed a series of tests required by the EN 13564 standard and received the CE mark. Studies conducted by independent, external laboratory showed excellent e ciency and e ectiveness of valves in the upright position. The designed manual closure, developed by Karmat, allows you to use it also in a vertical position. It also provides the possibility to verify proper valve operation without removing the cover. Like other models the backwater valves mounted vertically operate automatically and reliably, protecting facilities against flooding caused by the back flow of sewage. Features: - Mounting: vertical; - Diameter: 110mm; - The possibility of mounting on a vertical pipe means no need for conversions and lower costs.