In a DCVA, how much pressure must CV # 1 and CV # 2 hold in the direction of flow?

In a Double Check Valve Assembly (DCVA), the two check valves, referred to as CV #1 and CV #2, must maintain a minimum amount of pressure in the direction of flow to ensure proper function and prevent backflow. The correct pressure that these check valves need to hold is 1.0 psi.

This specific pressure requirement is important because it ensures that the valves can effectively seal and prevent any reverse flow of water, which is critical in protecting the potable water system from contamination. If the pressure is too low, the check valves may not close adequately, leading to potential backflow situations. The regulation ensuring the 1.0 psi threshold is in place to guarantee safe and reliable operation under typical conditions.

Understanding this pressure requirement is crucial for anyone involved in backflow prevention, as it highlights the importance of maintaining our water supply's integrity.