Pipe Wrap 
Quickly and easily fix any pipe leak, up to 450 psi, with Pipe Wrap. Used for years by industry to repair cracks and leaks in a wide variety of applications.
http://www.piperepair.net/Naylor Industries 
Manufacture clay, plastic and concrete drainage, concrete, hi-spec lintels, stoneware, gardenware and other building materials for domestic and export markets.
http://www.naylor.co.uk/
PipingDesign.com 
Process piping information, books, education, links, contacts, software and mailing list. One-stop source for process piping professionals.
http://www.pipingdesign.com/
Ameron International 
Producer of fiberglass-composite piping, concrete and steel pipe systems and specialized construction products.
http://www.ameron.com/
Material Resources Inc 
Manufacture adjustable supports for flanged valve and piping systems .
http://www.standon.net/
Future Pipe Industries 
Manufacture glass reinforced piping for industrial and civil applications. Features an engineering guide providing information for the design, specification and installation .
http://www.futurepipe.com/
O'Tool Industries 
Supply a range of pipe and fittings for the construction, industrial, and agriculture industries. Products supplied in a range of materials including bronze, cast and ductile iron, stainless and carbon steel, and thermoplastics.
http://www.otool.com/
Gladding, McBean 
Manufactures vitrified sewer pipe.
http://www.gladdingmcbean.com/
F. A. S. P. Corporation 
Manufacture an innovative French drain pipe designed to eliminate problems with clogging.
http://members.aol.com/faspinc
Conley Corporation 
Manufacturer of corrosion resistant fiberglass pipe, fittings, strainers and valves.
http://www.conleyfrp.com/
Armtec 
Manufacturer and distributor of corrugated steel and high-density polyethylene (HDPE) pipe products for use in infrastructure, mining, forestry, industrial, residential, agricultural and municipal applications.
http://www.armtec.com
Perma-Pipe, Inc. 
Manufactures pre-insulated pipe and double containment pipe for the oil and gas industry. Also offer leak detection and location, heat traced cathodic protection systems and pipe inspection services.
http://www.permapipe.com/
Alabama Pipe and Supply 
Distributor of pipe products made of corrugated steel, corrugated HDPE and PVC. Also distribute accessory products used in underground construction. US South Central.
http://www.alabamapipeandsupply.com
AGRU Kunststofftechnik GmbH 
Austria. Manufacturers of plastic pipes and fittings for industry, and gas and water supply. Also, concrete protective liners, and environmental solutions. Multi-lingual site.
http://www.agru.at/
Flowtite Technology AS 
Manufactures flowtite glass reinforced polyester (grp) pipes for use in widespread applications, including trenchless installations.
http://www.flowtite.com/
Recanati service 
Manufacturer of steel water pipe and gas pipe fittings and pipe coating. Italy
http://www.recanatiservice.it
ZheJiang Trysun Piping System Co., Ltd 
Manufacture pipes and fittings for various applications such as water, gas, mine, sewage and irrigation purposes. China
http://www.3lpipesystem.com