Reduced pressure zone (RPZ) assemblies are considered one of the most reliable and effective types of backflow preventers. They provide protection against both back siphonage and backpressure, making them suitable for high-pressure and high-flow applications. RPZ assemblies also provide a high level of protection against contamination, making them ideal for HVAC make-up water systems that supply critical equipment, such as hospitals and data centers. Additionally, RPZ assemblies are often required by local regulations and codes for certain applications.