Ostendorf Kunststoffe. HT-Safe PP. Bend 30° with triple patented seal that simplifies installation, a PP-H formula that complies with standard DIN 4102 (fire class B1) and DIN EN 1451-1. RAL colour 7043. German quality with 25 year warranty. Application: drain pipes for buildings such as: waste water, 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). (Connecting pieces contain information on angle degrees).