Each assembly has different features and purposes. Choose an assembly that meets your needs.
Isolating Non-Health Hazards
A DCVA is a mechanical backflow preventer that consists of two independently acting, spring-loaded check valves. It includes shutoff valves at each end of the assembly and is equipped with test cocks. A DCVA is effective against backpressure backflow and backsiphonage but should be used to isolate only non-health hazards.
Details about this system include:
Install anywhere (above or below ground)
Low-hazard sites such as apartment buildings
State requires annual testing by State-certified tester
Used for irrigation systems supplied by City water only