New York City DOH Practice Exam 2025 – Your All-In-One Guide to Success!

An Atmospheric Vacuum Breaker (AVB) plays a crucial role in preventing backflow in potable water systems. Its correct installation is essential for maintaining water safety. The requirement that it must be installed in any equipment connected to a potable water supply underscores its purpose. The AVB acts as a safeguard against contamination of the drinking water supply by preventing potential back-siphonage when the water pressure drops.

In any setup where potable water is utilized, such as in irrigation systems, toilets, or any plumbing fixtures, the AVB is needed to provide a reliable barrier against any possible reverse flow of non-potable substances that could compromise water quality. This is particularly important in maintaining the integrity of the water supply in public health contexts.

While the proper installation of an AVB might also require it to be connected to specific points such as hose bibs, this is not its only application. Moreover, while involving licensed contractors can ensure compliance with local codes, it is not a direct requirement stated for the AVB itself. Thus, the emphasis on installation in connection to any potable water supply reflects its broader role in ensuring safe drinking water for the public.