Used for connection to polyethylene water supply pipes with a maximum pressure of 10 bar, corresponding to a temperature of 20°C. Components Polypropylene body, black color Galvanized steel bolts and nuts NBR O-ring STAINLESS STEEL AISI 430 stiffening ring Reference standards Thread according to DIN 2999 BS 21 ISO R 7/1 up to D160mm. ISO 228 for D180 D315mm Pipe coupling: PE according to DIN8072-8074, ISO 3607 and EN ISO 12201 PVC according to ISO161, EN ISO 1452, BRL-K502 PP according to ISO 3609, UNI 8318, DIN 807.