Backwater valve PP dn 200mm for concrete manholes type 0, with a removable flap, universal, for external sewage UZBBW200

The backflow preventer mechanism is lifted to the surface with a rod, without having to enter the well. In the event of backflow, it is stopped by the flap pressed against the valve head. Can be mounted on a concrete outlet of a rainwater drainage pipe to rivers or reservoirs. The chrome-nickel cover of the flap, seals and levers effectively prevents rodents from migrating. A special, patented by Karmat flap seal allows for precise sealing of the valve inserted inside the pipe. A carefully designed flap seal perfectly adheres to the inside of the pipes, regardless of their wall thickness, which means that the liquid does not encounter any fault on its way.