Rinker Materials Corporation.
Rinker Group
http://www.rinkermaterials.com/ProdsServices/ConcretePipe/default.shtml

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/

No-Dig-Pipe, Microtunneling Clay Pipe
No-Dig, A Division of MCP Industries Inc is the manufacturer of the first rigid bodied, clay pipe for use in microtunneling, sliplining, pipe bursting and in casings in the United States. Our first installation was in Houston Texas in April 1992. Since that time, over 70,000 linear feet of NO-DIG pipe have been installed.
http://www.no-dig-pipe.com/

Clow Water Systems Pipe and Fittings
Clow Water Systems Company has been one of the United States premiere manufacturers of iron pipe and fittings in the waterworks industry.
http://www.clowwatersystems.com

Liberty and Rocky Mountain Pipe
Liberty Pipe Companies supplies, designs, manufactures, fabricates, and installs equestrian, livestock and estate fencing and buildings. Performance Pipe Products, Fencing, Pipe, and Asset Recovery.
http://www.libertypipe.com/

Star Pipe Products
Star Pipe Products; a manufacture of ductile iron fittings, joint restraints, construction and municipal castings, AWWA grooved products, soil pipe and related products.
http://www.starpipeproducts.com

South East Water Limited
South East Water is a state-owned Company, which provides water and sewerage services to over 1.3 millions customers in the south-east of Melbourne, Victoria, Australia.
http://www.sewl.com.au/

Pipe Jacking Association
The Pipe Jacking Association has been established for 25 years and represents the leading contractors, pipe suppliers, and machine manufacturers in the United Kingdom pipe jacking and microtunnelling industry.
http://www.pipejacking.org/

National Netherlands Pipe Collection
Pijpenkabinet Foundation's pipe museum displays over two-thousand items that encompass the culture of pipe smoking over 25 centuries and five continents.
http://www.pijpenkabinet.nl/Pijpenkabinet/00-E%20frame.html

Bristolpipe
Serving the plastic pipe needs of wholesalers and contractors; including pipe for drainage, waste and venting; water pressure, sewer main, drain pipe, industrial fluid handling, and communication duct.
http://www.bristolpipe.com/