Compression fittings (WaterKit) are designed for the pressurized conveyance of drinking water. Components (A) – Fitting body, PP-B polypropylene with excellent mechanical properties even at high temperatures, black. (D) – Locking bushing, polypropylene, black. (B) – Tightening nut, PP-B polypropylene with added colorant, high UV radiation stability and heat resistance (grade 8, per DIN 54004), blue RAL5005. (C) – Compression ring, POM acetal resin with high hardness and mechanical strength, white. (E) – O-ring sealing gasket, NBR acrylonitrile elastomer rubber, food-grade, black. Reference standards Dimensions: UNI 9561 Working pressures: UNI 9562, DIN 8076-3, ISO 14236, BRL-K03 Polyethylene pipes: EN 12201, DIN 8074, UNI 7990 Threads: UNI ISO 7/1, EN 10226-1, ANSI ASME B1-20.1 Flanges: DIN 2501-1, EN 1452-3, ISO 7005-2 Use PN represents the maximum operating pressure (~PFA in EN 805) and is 16 bar for diameters 16–63 mm and 10 bar for diameters 75–110 mm, at an operating temperature of 20°C.