» Advanced Support Products, Inc.
   Custom design and manufacture support systems for the mounting of equipment, piping or any structure on roof systems or raw land sites.
   http://www.aspbase.com/

» Assured Flow Sales, Inc.
   Manufacture pressure-rated, ductile iron, cement-lined, tar-coated fitting designed to connect fire hydrants to gate valves and water mains.
   http://www.gradelok.com/

» Lancashire Fittings
   Manufacturers and distributors of stainless steel pipe fittings, valves, flanges, repair clamps, instrumentation fittings, tube and pipe.
   http://www.lancs-fittings.co.uk/

» National Steel Products Co. Ltd.
   Manufacturer of malleable fittings, flanges and butt-weld fittings.
   http://www.designmaker.com/national-steel-products/malleable_iron_fittings.htm

» Reel Pipe and Valve
   Industrial pipe, valve and fitting wholesaler based in Indianapolis
   http://members.aol.com/reelpipe/

» Star Pipe Products
   Global manufacturer and supplier for a broad array of pipe fittings and pipe fitting accessories.
   http://www.starpipeproducts.com

» Texas Pipe Works Inc.
   Manufacture and distribute pipe couplings including merchant, water well , UL conduit and drive shoe couplings.
   http://www.texaspipeworks.com/