Saint-Gobain Pipelines is the leading UK supplier of a range of ductile iron pipes, fittings, valves, manhole covers, gullies and grates as well as being the leading producer of cast iron above and below ground drainage systems. The range includes syphonic cast iron rainwater drains, Steel access covers for commercial and industrial developments, Cast iron rainwater and gutter systems and above and below ground iron drainage pipes and couplings.