Amazon.com  - Distributed of plumbing, air-conditioning & mechanical trades books

ASSE - American Society of Sanitary Engineering

Builder's Book Inc. - books & software for the construction industry.

Contractor Magazine - Cahners Pub. - newsmagazine for air conditioning, heating, plumbing and mechanical contractors

Crane Company – Flow of Fluids Premium, Software tools to design piping systems.

US Dept. of Energy - Office of Energy Efficiency and Renewable Energy - Radiant Floor and Heating Systems.

Plumbing Foundation City of New York, Inc. Established in 1986, is a nonprofit association of licensed contracting firms, engineering associations, manufacturers and suppliers whose mission is to insure the public health through the enactment and enforcement of safe plumbing codes. See list of Related Links to NY organizations.

Plumbing & Mechanical - P & M Magazine http://www.pmmag.com/

PM Engineer magazine (Business News Publishing) - plumbing, piping, hydronics and sprinkler engineers http://www.pmengineer.com/

Reeves Journal - for plumbing professionals in the 14 western states http://www.reevesjournal.com/

Supply House Times - monthly for plumbing distributors http://www.supplyht.com/

Wholesaler Magazine - monthly for wholesaler plumbing distributors http://www.tmbpublishing.com/