Arran Pipeline Supplies Ltd T/A Collister and Glover. Part of the Arran Pipeline and FDL Group since August 2020 and trading since 1977 we have over 40 years of experience and expertise in all Engineering disciplines. We are a leading independent stockist and distributor of Tubes, Valves, Fittings, Underfloor Heating, Pumps, Tools & Timber. Collister & Glover represent all the major manufacturers including DAB, Grundfos, Calpeda and Lowara Pumps, Tracpipe flexible gas pipe, Philmac, M-Press fittings and Gas fittings. We also hold a large stock of copper, brass, stainless steel and carbon fittings and flanges.