A complete range of plastic/brass composite unions is available from stock in sizes between 1/2" (DN15) and 2" (DN50) nominal bore. These composite unions are available in either UPVC or ABS industrial grade plastic with a choice of male or female BSP threaded ends in brass. All of the unions we supply have been manufactured to the highest standards by Durapipe and are primarily used as a means of adapting a plastic pipeline system to a metal or steel based installation.