Description ClydeUnion Pumps has over 140 years of experience in pumping technologies and has a rich heritage of product brands. May 2007 saw the formation of Clyde Pumps through the acquisition of Weir Pumps, a long-standing engineering company with roots dating back to 1871. Following was the acquisition of Union Pumps in November 2008, which formed ClydeUnion Pumps. The joining of these companies brought together some of the most respected products, people and heritage brands in the business including the more recent addition, S&N Pumps, who specialise in technologies for exploration and marine markets.