To what pressure must the compressor be capable of pressurizing pressure tanks within 3 hours?

The correct answer is based on the operational requirements and standards related to pressure tanks in sprinkler systems. For pressure tanks used in these systems, a pressure rating that ensures the efficient functioning of the system is critical. In many applications, especially in fire protection or irrigation systems, maintaining an adequate pressure is essential for proper water distribution and system reliability.

A pressure of 75 PSI typically meets the operational needs of various sprinkler systems, ensuring that sufficient water can be delivered effectively when deployed. This allows the system to function optimally while providing a balance between safety and efficiency.

The other pressure levels, while potentially adequate in specific contexts, may not offer the standard performance required across the board. For instance, pressures below 75 PSI may not be sufficient for effective performance in many systems, where higher pressure levels are needed to achieve distance and coverage of water distribution. Similarly, higher pressures like 100 PSI or 125 PSI might be more than what is necessary, leading to increased wear and tear on equipment and higher energy costs without corresponding benefits for many applications.