Ostendorf Kunststoffe. HT-Safe PP. Bend 87° with triple patented seal that simplifies installation, a PP-H formula that complies with DIN 4102 (fire class B1) and DIN EN 1451-1. Ral colour 7043. German quality with 25-year warranty. Application: drainage pipes for buildings such as: wastewater, rainwater, and ventilation (see also application areas: DIN 1986-4). Marking of pipes and fittings: permanent marking with manufacturer label, nominal diameter and standard (DIN EN 1451-1) + date of manufacture, material, building material class (fire behaviour). (Connection pieces contain information regarding angle degrees).