Cross Connection Practice Exam

What is the minimum pressure at which the relief valve of a Reduced Pressure Principle Assembly must open to meet requirements?

1. 1.0 psid

2. 1.5 psid

3. 2.0 psid

4. 3.0 psid

The correct answer is: 2.0 psid

The minimum pressure at which the relief valve of a Reduced Pressure Principle Assembly (RPPA) must open is 2.0 psid. This is a critical aspect of the functionality of the RPPA, which is designed to protect the potable water supply from contamination by ensuring that any backpressure or backflow is safely managed. In the context of backflow prevention, the relief valve plays a crucial role in maintaining the differential pressure. When the pressure in the downstream system becomes greater than that in the supply line, the relief valve opens at this specified pressure to allow trapped water to escape, thereby preventing any contamination. By ensuring that this valve opens at a minimum pressure of 2.0 psid, it maintains the necessary safety measures to safeguard the public water supply. This pressure setting is aligned with standard regulations and practices to ensure optimal performance and reliability of the assembly in preventing backflow situations.