Sound-absorbing, double-layer PP-H pipe with mineral additives, used in indoor sewer installations for civil buildings, where damping the noise produced by water flow through discharge stacks is required, to increase acoustic comfort. – Diameter range: (Ø)40-110. – 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-extinguishing within max. 20 seconds after flame removal. – Color: RAL 9005 (jet black) – Jointing: socket and gasket.