G.A. Murdock, Inc. is a provider of high-quality water purification and installation supplies for the water conditioning industry. Manufacturer of Mur-lok® Fittings, Tubing & Valves We mold, extrude, and assemble our Mur-lok products in the USA using state-of-the-art automated equipment, allowing us to provide you with high quality, competitively priced products. Wholesale Distributor of Water Purification Supplies Whether it is a valve, fitting, or filter, customers around the world have come to rely on G.A. Murdock for the products they need, when they need them. We carry hundreds of quality products from the best manufacturers in the industry. In addition to molding our own products, we also offer turnkey custom plastics manufacturing services.