Backflow Prevention Manual 2nd Edition Author:IAPMO Backflow Prevention Institute The unique, publication contains full-color illustrations in real-world field settings, and is a truly comprehensive book on the subject of backflow prevention. The Manual contains sections relating to installation, testing, cross-connection control, repair, and inspections, and can also be used as a textbook for these areas. Additionally, Backf... more »low Prevention Reference Manual can be used by regulatory agencies as a guide to determine what type of valve can be used in a particular case. This second edition was updated in 2011 to include Backflow Prevention Test Procedures for 1-Hose, ASSE, US EPA and Southern California.The International Association of Plumbing and Mechanical Officials (IAPMO) is the premier non-profit membership based organization that specializes in developing standards and excellent in the Plumbing and Mechanical Industry since 1926. We represent a unique mix of governmental representatives, industry representatives and tradespeople all sharing a common interest - safe and efficient plumbing and mechanical systems through the development, application and enforcement of the Uniform Codes. Some of the many areas where we publish include: -Uniform codes in the Plumbing, Mechanical, Solar Energy, and Pool, Spa, and Hot Tub and Green segments