Sound-absorbing, double-layer PP-H pipe with mineral additives, used in indoor sewerage installations for civil buildings, where attenuation of the noise produced by water flow through discharge stacks is desired, in order to increase 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, intermittent. – Flame retardancy: class B2, according to DIN 4102, self-extinguishes within max. 20 seconds after flame removal. – Color: RAL 9005 (jet black) – Jointing: socket and gasket.