Raccorderie metalliche S.p.A.
20081209 Raccorderie Metalliche SpA: production of radiator plugs, reducing plugs, collars for pipes, fixing systems for pipes, pressfittings; tappi per radiatori, riduzioni per radiatori, collari per tubazioni, sistemi di fissaggio per tubazioni, raccordi a pressare, raccordi inox, raccordi in acciaio al carbonio, flange inox, flange in acciaio al carbonio, mensole per radiatori e molti altri articoli per idrotermosanitaria
http://www.racmet.com

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

Dizyan Group
Manufacturer of plastic pipe for water, sewer and heating applications, including PEX and aluminum foil reinforced pipe. Turkey
http://www.dizaynteknik.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/

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

Per Aarsleff A/S Pipe Technologies
Renovates pipes and pipe systems using No Dig technologies. The No Dig division renovates e.g. pipes for potable water, discharge water, process water, rainwater, gas and district heating, and also vertical downpipes, and vent shafts.
http://www.aarsleff.com/

Belform Insulation
Available in buns, boardstock, cut pipe sections, pipe supports, bends and curved segments, Koolphen K is suitable for heating, ventilation, air conditioning, process and industrial applications.
http://www.belform.com/

Invisible Heating Systems (UK) Ltd.
UK. Design, manufacture and install underfloor heating, geothermal heat pumps, road energy, solar, and wind powered heating systems. Includes technical information, products and contact information.
http://www.invisibleheating.co.uk/

Plastics Pipe Institute - PPI
The Plastics Pipe Institute (PPI) is the trade association representing the plastic pipe industry. Site includes technical information about the use of plastic pipe for water, drainage, fuel gas, conduits, plumbing, and heating. Membership rosters available for all pipe divisions.
http://www.plasticpipe.org/

Rayotec Ltd.
Rayotec (UK) are leading supplies of Electric Underfloor Heating, Warm Water Underfloor Heating, Solar Heating Panels, and Photovoltaic Electric Solar Electricity Panels.
http://www.rayotec.com