Thermally insulated air vent DN75/90/110 HL901

Used for the aeration of individual devices and risers not led above the roof, in larger sewage systems, it is necessary to extend every fifth and last riser above the roof, the remaining ones can be protected with an air vent valve. -20oC operation +60oC-Klasa A1. Air flow 32 l / s. Conforms to PN-EN12380 class A1. Installation below the flood level, with a protective mesh. Complete with a massive rubber coupling for mounting on DN90 socket pipes and on the bare ends of DN75 and DN110 pipes.