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American Backflow Prevention Association
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American Society of Plumbing Engineers - Houston Chapter
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American Society of Plumbing Engineers - (ASPE) international organization
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American Society of Sanitary Engineering - association sanitary engineering principles
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American Supply Association (ASA) - association plumbing, heating, cooling products wholesalers and manufacturers
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American Water Works Association (AWWA)
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Association of Industry Manufacturers Representatives (AIM/R)
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BOCA International - assists code officials
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Copper Development Association (CDA)
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Florida Association of PHCC
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Fresno Area Plumbers, Pipe and Refrigeration Fitters - apprenticeship program, California
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International Association of Plumbing and Mechanical Officials (IAPMO)
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International Conference of Building Officials (IBCO)
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Master Plumbers' School - Staten Island, New York - Emanuel A. Troise Jr.
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Minnesota Pipe Trades - union site
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Nassau County Association of Plumbing, Heating & Cooling Contractors - Long Island (Nassau & Suffolk), New York PHCC
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National Kitchen & Bath Association
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New Jersey State League of Master Plumbers - The Nations Oldest League of Master Plumbers
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NSF International (NSF)
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Omni - Plumbing suppliers buying group
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PEX Supply - PEX Supplier
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PHCC Maryland State Web Site - Maryland State office of the PHCC National Association
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PHCC of Greater Los Angeles Local Association - PHCC Association
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PHCC/Master Plumbers Association of Wisconsin - Wisconsin
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Pipe Trades Association - United Association of Journeymen and Apprentices - UA locals in Calif. Bay area
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Piping Industry Progress & Education (P.I.P.E.)
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PlumbingForum.com
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Plumbing Foundation City of New York - The Plumbing Foundation City of New York
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Plumbing-Heating-Cooling Contractors Association of California - California
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Plumbing, Heating, Cooling Contractors Association of Washington State
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Plumbing Manufacturers Institute (PMI)
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Seattle Pipe Trades - union site
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South Bay Piping Industry - union site
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Suffolk County Association Of Master Plumbers - Suffolk County, Long Island, New York.
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UPA - Plumbing Buying Group
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United Association of Journeymen and Apprentices - union plumbers, pipe fitters, technicians, apprentices
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Water Quality Assoc.
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Wisconsin Pipe Trades Association - union site