ASME A112.18.3 - Performance Requirements for Backflow Devices and Systems in Plumbing Fixture Fittings A112.18.3 - 2002

This Standard addresses functional performance and requires physical characteristics of devices and systems which provide backflow protection consistent with the level of risk associated with the plumbing fixture fitting application. The Standard establishes specific performance criteria and provides the test methods to prove compliance. It is applicable to all plumbing fixture fittings with outlets not protected by an air gap.