Plastica Alfa compression fittings started with Blu Line range, over 25 years ago; during these years they have been improved to increase the allowable operating pressure PFA (PN) from 16 up to 18 bar. Blu Line fittings are used to connect polyethylene (LDPE, MDPE and HDPE) and PPR pipes to supply pressurized (up to PFA 16) and not pressurized fluids, especially used for drinking water supply in aqueducts and civil installations, irrigation, firefighting systems, geothermal systems, to convey waste and industrial water, compressed air.