Features like the 3P backwater flap DN 100, additionally with special over- flow siphon UNO, overflow with odour trap and suction of surface water.
Operating principle: Dirt particles that are lighter than water (e.g. pollen) slowly rise and float on the water surface. This floating layer is removed by the special shaped overflow siphon with skimmer effect. DN 50 connection pipe to use a HT pipe as a support pipe. Is supported on the rainwater storage wall. The overflow siphon is filled with water (odour trap). If the storage tank has a low water level the support helps to keep the overflow siphon in the correct position.
