Agricultural Drainage Management Coalition - ADMC: Organization promoting controlled outlet land drainage as an environmental best management practice, improving water quality by reducing nutrient runoff through plastic field tile drainage.
Plastic Pipe and Fittings Association - PPFA: Trade association for companies in the United States and Canada, with information about products, standards, and codes. Includes membership roster, organized by company type.
Plastics Industry Pipe Association of Australia: National trade association working to increase acceptance of PVC and polyolefin pipeline systems. Provides technical information. Includes membership roster.
Plastics Pipe Institute - PPI: Trade association representing the plastics piping industry. Contains technical information about the use of plastic pipe for water, drainage, fuel, gas, conduits, plumbing, and heating. Includes membership roster.
Uni-Bell PVC Pipe Association: North American association of polyvinyl chloride (PVC) pipe manufacturers. Contains technical and application information about PVC pipe. Has a members roster.