Plumbing and Mechanic Magazine
PM Engineering Magazine
Contractor Magazine
Drinking Water and Backflow Prevention Magazine
The Building Officials and Code Administrators International
The International Conference of Building Officials
International Code Council
The Southern Building Code Conference International
American National Standards Institute
American Society of Mechanical Engineers
ASTM International Standards
Air-Conditioning Heating and Refrigeration Institute
American Gas Association
American Society for Testing and Materials
Gas Research Institute
International Approval Services
National Association of Home Builders
National Multi Housing Council
National Propane Gas Association
Manufactured Housing Institute
Heating, Ventilation and Airconditioning TV
Pennsylvania Association of Plumbing, Heating and Cooling Contractors
American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc.
American Backflow Prevention Association
American Society of Plumbing Engineers
American Society of Sanitary Engineering
Mechanical Contractors Association of America
National Association of Home Builders
National Fire Protection Association
National Kitchen and Bath Association
Water Quality Association
Code of Federal Regulators - U.S. Government Printing Office
The U.S. Department of Housing and Urban Development
The National Institute of Standards and Technology