Implementation of the main networks for HDPE pipelines 225 :1200 mm dia. & 54 km. For 4 stations: * station 1 network with 9.9 km length and 225:1000 mm dia. * station 2 network with 10.4 km length and 225:1200 mm dia. * station 3 network with 14.1km length and 250:1200 mm dia. * station 4 network with 19.3 km length and 250:1200 mm dia.