Once again ETERNO IVICA does a revolution in the world of accessories for waterproofing systems. Revolution is in the flange made of a piece of polymeric modified bituminous membrane. Revolution is also in the adhesion, totally perfect and quick to any sort of bituminous membrane, both in single or double layer. Revolution is ultimately in the spigot 450mm and 250 mm long, the only one in the market with 10 real anti-infiltration tongues to prevent any infiltration between spigot and pipe in case of water back-up. Due to the thickness of the bituminous membrane, we please you pay attention to the real internal size of the drain.