Sound-absorbing, double-layer pipe, made of PP-H with mineral additives, used in indoor drainage systems for civil constructions where noise attenuation from water flowing through discharge stacks is desired, to enhance acoustic comfort. – Diameter range: (fi)40, (fi)50, (fi)75, (fi)110. – Acoustic performance: 16 dB, according to SR EN 14366. – Compliance: EN 1451 – Material: PP-H with mineral additives – Type: double-layer, white interior, black exterior. – Maximum operating temperature: +95°C, intermittently. – Fire resistance: class B2, according to DIN 4102, self-extinguishes within a maximum of 20 seconds after flame removal. – Color: RAL 9005 (jet black) – Connection: socket and gasket.