What type of issues does a Double Check Valve Assembly (DCVA) address in low-hazard applications?

A Double Check Valve Assembly (DCVA) is designed to protect the potable water supply from contamination by preventing both back-pressure and back-siphonage. Back-pressure occurs when the downstream pressure of non-potable water exceeds that of the potable water system, which can cause contamination to flow back into the clean water supply. Meanwhile, back-siphonage happens when there is a negative pressure in the potable system, which could create a situation where potentially contaminated water is drawn back into the system.

In low-hazard applications, the DCVA provides a crucial role by ensuring that neither of these two conditions can compromise the safety and quality of drinking water. This dual action makes the DCVA essential for safeguarding against potential hazards from both types of backflow, which is why the response is both comprehensive and appropriate for the intended use of the assembly.