The Thomas Dudley Niagara pneumatic double flush valve is suitable for both new and as a replacement for existing installations. Thanks to the 2-piece design, you no longer have to remove the entire cistern to maintain the valve in the future. Simply turn the valve counterclockwise and the entire mechanism of the upper part can be removed. After that, you just need to screw the new valve clockwise and connect the pneumatic hoses. The valve also has 1 m long pneumatic hoses and is therefore ideal for flush mounting.