What is the EPA-required evacuation level for recovery or recycling equipment used on low-pressure systems?

The EPA requires that recovery or recycling equipment used on low-pressure systems achieve an evacuation level of 25 mm of Hg absolute. This standard is set to ensure that the system is effectively evacuated of refrigerants before maintenance or service work is performed. Reaching this level is crucial because low-pressure systems often contain substances that can be harmful to the environment, and proper recovery helps in preventing refrigerant leaks.

Understanding the correct evacuation level is important for compliance with regulations and for maintaining the integrity of the refrigeration system. The specified measurement in mm of Hg directly correlates with the efficiency and safety of the recovery process, emphasizing the need for precise equipment operation to protect both the environment and technicians working on the systems. Other options reflect either incorrect measurements or improper protocols for evacuation in low-pressure systems.