The Uniform Plumbing Code (UPC) has a long history of providing useful information that is not offered by other model codes. The UPC includes Installation Standards as an appendix that aids inspectors and installers on how to properly install a plumbing system. Installation Standards (IS) are industry standards that specify procedures for installation of plumbing and mechanical products, and the inspection methods and procedures employed for the examination of such systems. These comprehensive standards add detailed information and guidance where a manufacturer or product installation instructions may not fully address. They give the user confidence with options from industry experts for installing plumbing products and assemblies in a safe and professional manner.
Installation Standards were first introduced into the 1976 edition of the UPC. These documents were originally developed by IAPMO membership to aid in the installation and inspection of plumbing products, and date back as early as 1957 when IS 1 (Non-Metallic Building Sewers) was one of the first to be published. IAPMO members include inspectors, plumbers, manufacturers, special experts, students and many other disciplines. It is important to keep in mind that the Installation Standards are not Product Standards, and they are not intended to be used for product testing and certification. Installation Standards offer information on the common practice of installation used by the industry and are useful for installers and inspectors alike. Additionally, many jurisdictions choose to adopt IAPMO Installation Standards along with the Uniform Plumbing Code as part of their local plumbing ordinance.