The superstructure element to the parapet funnel is a structure made of a lattice and a corrugated throat with a combined shutter inside. The grille and the edge around it are made of stainless steel. The remaining elements are made of plastic. The throat is convenient and easy to cut in height, if necessary. There is a dry shutter inside. The grid size is 10*10 mm or 15x15 mm.
Combined siphon type = double protection with a water level of 28.5 mm.