What components are found in a Double Check Valve Assembly (DCVA)?

A Double Check Valve Assembly (DCVA) is designed to prevent backflow in water supply systems, ensuring that potable water is protected from contamination. The correct components of a DCVA include two independently operating check valves. These check valves work together to allow water to flow in one direction while blocking any reverse flow, which is essential for maintaining safe water quality.

Additionally, a DCVA is equipped with four test cocks. These allow for testing and maintenance of the assembly, ensuring that it functions correctly and that any leaks or issues can be detected and addressed promptly. The presence of two shut-off valves is also critical; they enable isolation of the assembly for maintenance or repairs without shutting off the entire water supply to the system.

Together, these components form a reliable backflow prevention system. The combination of multiple check valves and the ability to test and isolate parts of the assembly is what makes the DCVA particularly effective in various applications where the risk of backflow is present.