| Accessories | Joining or Repairing without Brazing | American Lokring Corp. | http://www.lokringusa.com |
| Accessories | Joining or Repairing without Brazing | Browning/Emerson Power Transmission | http://www.emerson-ept.com |
| Accessories | Joining or Repairing without Brazing | Production Control Units, Inc. | http://www.sterlingpcu.com |
| Aluminum |
| Anderson Metal Corp., Inc. | http://www.andersonmetals.com |
| Aluminum |
| Holyoke Fittings, Inc. | http://www.holyokefittings.com |
| Aluminum |
| Midland Metal Mfg. Co. | http://www.midlandmetal.com |
| Aluminum |
| H-P Products, Inc. | http://www.h-pproducts.com |
| Brass |
| Dearborn Brass | http://www.dearbornbrass.com |
| Brass |
| McGuire Manufacturing Co., Inc. | http://www.mcguiremfg.com |
| Brass |
| Oatey SCS | http://www.oateyscs.com |
| Brass |
| Trenton Pipe Nipple Co. | http://www.trentonpipe.com |
| Brass |
| Cerro | http://www.cerro.com |
| Brass |
| Halstead | http://www.burnham.com |
| Brass |
| Howell | http://www.howellmetal.com |
| Brass |
| Kobe | http://www.kobecopper.com |
| Brass |
| Mueller | http://www.muellereurope.com |
| Brass & Copper |
| Copper Development Association Inc | http://www.copper.org |
| Bronze |
| Copper Development Association Inc | http://www.copper.org |
| Copper |
| Anderson Metal Corp., Inc. | http://www.andersonmetals.com |
| Copper |
| Cambridge-Lee Industries | http://www.camlee.com |
| Copper |
| Copper Development Association Inc. | http://www.copper.org |
| Copper |
| Durst Corp. | http://www.durstcorp.com |
| Copper |
| Holyoke Fittings, Inc. | http://www.holyokefittings.com |
| Copper |
| Midland Metal Mfg. Co. | http://www.midlandmetal.com |
| Copper |
| Mueller Industries, Inc. | http://www.muellerindustries.com |
| Copper |
| Watts Regulator Co. | http://www.watts.com |
| Copper |
| Cerro | http://www.cerro.com |
| Copper |
| Halstead | http://www.burnham.com |
| Copper |
| Howell | http://www.howellmetal.com |
| Copper |
| Kobe | http://www.kobecopper.com |
| Copper |
| B & K Industries, Inc. | http://www.muellerindustries.com |
| Corrugated Stainless Steel |
| FlexHead Industries, Inc. | http://www.flexhead.com |
| Corrugated Stainless Steel |
| Omega Flex | http://www.omegaflex.com |
| Corrugated Stainless Steel |
| Parker Hannifin Corp. | http://www.parker.com/cig |
| Corrugated Stainless Steel |
| Tru-Flex Metal Hose Corp. | http://www.tru-flex.com |
| Couplings |
| Dallas Specialty & Mfg. Co. | http://www.dalspc.com |
| Fabric |
| Berner Intl. Corp. | http://www.berner.com/ |
| Fabric |
| National System of Garage Ventilation, Inc. | http://www.nsgv.com |
| Finned |
| Embassy Industries, Inc. | http://www.embassyind.com |
| Finned |
| Fintube Technologies, Inc. | http://www.fintubellc.com/ |
| Finned |
| Slant / Fin Corp. | http://www.slantfin.com |
| Flexible |
| Anderson Metal Corp., Inc. | http://www.andersonmetals.com |
| Flexible |
| Corzan Piping Systems | http://www.corzancpvc.com |
| Flexible |
| Dearborn Brass | http://www.dearbornbrass.com |
| Flexible |
| FlexHead Industries, Inc. | http://www.flexhead.com |
| Flexible |
| FlowGuard Gold Pipe & Fittings | http://www.flowguardgold.com/ |
| Flexible |
| Harvel Plastics, Inc. | http://www.harvel.com |
| Flexible |
| Holyoke Fittings, Inc. | http://www.holyokefittings.com |
| Flexible |
| Hydronic Alternatives | http://www.hydronicalternatives.com |
| Flexible |
| Infloor Heating Systems | http://www.infloor.com |
| Flexible |
| IPEX | http://www.ipexinc.com |
| Flexible |
| Oatey SCS | http://www.oateyscs.com |
| Flexible |
| Parker Hannifin Corp. | http://www.parker.com/cig |
| Flexible |
| PEP Plastic Engineered Products | http://www.pep-plastic.com |
| Flexible |
| REHAU Inc. | http://www.rahau.com |
| Flexible |
| Roth Industries, Inc. | http://www.roth-usa.com |
| Flexible |
| Titeflex Corp., Gastite | http://www.gastite.com |
| Flexible |
| Tru-Flex Metal Hose Corp. | http://www.tru-flex.com |
| Flexible |
| Viega | http://www.viega.com |
| Flexible |
| Watts Regulator Co. | http://www.watts.com |
| Flexible |
| Zurn Plumbing Products Group | http://www.zurn.com |
| HiPurity Stainless Steel | Coax | Valex | http://www.valex.com |
| Metal | Flexible | Flex-Weld, Inc. | http://www.flex-weld.com |
| Metal | Flexible | Tru-Flex Metal Hose Corp. | http://www.tru-flex.com |
| Metal | Flexible | Twin City Hose, Inc. | http://www.twincityhose.com |
| Metal | Flexible | Z-Flex U.S., Inc. | http://www.z-flex.com |
| PEX |
| ComfortPro Systems LLC | http://www.comfortprosystems.com |
| PEX |
| Durst Corp. | http://www.durstcorp.com |
| PEX |
| Insulation Solutions, Inc. | http://www.insulationsolutions.com |
| PEX |
| IPEX | http://www.ipexinc.com |
| PEX |
| MacDuffCo Mfg. Inc. | http://www.ultra-fin.com/ |
| PEX |
| NIBCO Inc. | http://www.nibco.com |
| PEX |
| PEP Plastic Engineered Products | http://www.pep-plastic.com |
| PEX |
| Slant / Fin Corp. | http://www.slantfin.com |
| PEX |
| Upnor, Inc. | http://www.uponor-usa.com |
| PEX |
| Vanguard Piping Systems, Inc. | http://www.vanguardpipe.com |
| PEX |
| Viega | http://www.viega.com |
| PEX |
| Watts Regulator Co. | http://www.watts.com |
| PEX |
| Zurn Plumbing Products Group | http://www.zurn.com |
| Plastic |
| Corzan Piping Systems | http://www.corzancpvc.com |
| Plastic |
| FlowGuard-Gold Pipe & Fillings | http://www.flowguardgold.com/ |
| Plastic |
| Omega Engineering, Inc. | http://www.omega.com |
| Plastic |
| StockCap | http://www.stockcap.com |
| Plastic |
| Viega | http://www.viega.com |
| Radiant |
| ComfortPro Systems LLC | http://www.comfortprosystems.com |
| Radiant |
| Hydronic Alternatives | http://www.hydronicalternatives.com |
| Radiant |
| Insulation Solutions, Inc. | http://www.insulationsolutions.com |
| Radiant |
| IPEX | http://www.ipexinc.com |
| Radiant |
| MacDuffCo Mfg. Inc. | http://www.ultra-fin.com/ |
| Radiant |
| NIBCO Inc. | http://www.nibco.com |
| Radiant |
| Radiant Panel Association | http://www.radiantpanelassociation.org |
| Radiant |
| Slant / Fin Corp. | http://www.slantfin.com |
| Radiant |
| Viega | http://www.viega.com |
| Radiant |
| Zurn Plumbing Products Group | http://www.zurn.com |
| Rubber |
| Danco, Inc. | http://www.danco.com |
| Rubber |
| HBD / Thermoid, Inc. | http://www.hbdthermoid.com |
| Rubber |
| Holyoke Fittings, Inc. | http://www.holyokefittings.com |
| Rubber |
| StockCap | http://www.stockcap.com |
| Rubber |
| Watts Radiant | http://www.wattsradiant.com |
| Stainless Steel |
| FlexHead Industries, Inc. | http://www.flexhead.com |
| Stainless Steel |
| Tru-Flex Metal Hose Corp. | http://www.tru-flex.com |
| Steel | Pressure | Atlas Steel Products Co. | http://www.atlassteel.com |
| Steel | Stainless | AK Steel Corp. | http://www.aksteel.com |
| Steel | Stainless | Atlas Steel Products Co. | http://www.atlassteel.com |
| Steel | Stainless | H-P Products, Inc. | http://www.h-pproducts.com |
| Steel | Stainless | Omega Engineering, Inc. | http://www.omega.com |
| Steel | Stainless | Turbotec Products, Inc. | http://www.turbotecproducts.com |
| Steel | Stainless | Z-Flex U.S., Inc. | http://www.z-flex.com |
| Steel | Welded | Atlas Steel Products Co. | http://www.atlassteel.com |
| Steel |
| Durst Corp. | http://www.durstcorp.com |
| Steel |
| Sharon Tube Co. | http://www.sharontube.com |
| Steel |
| Tru-Flex Metal Hose Corp. | http://www.tru-flex.com |
|
| Mueller | http://www.muellereurope.com |