What type of caps must outdoor refrigerant lines have?

Outdoor refrigerant lines must have tamper-resistant caps to protect against unauthorized access and potential leakage of refrigerants. These caps are designed to secure the service ports of refrigerant lines, ensuring that only qualified personnel can access them for maintenance or repairs.

Tamper-resistant caps also play a crucial role in maintaining the integrity of the refrigerant system. They help prevent contamination from external elements and discourage improper handling, which could lead to refrigerant loss or damage to the system. This is particularly important in outdoor settings where exposure to environmental factors is a concern.

While standard caps may offer basic coverage, they do not provide the same level of security against tampering. Vented caps would allow air and moisture to enter the system, which can be harmful. Plastic caps may not withstand harsh outdoor conditions and could degrade over time, compromising the system's protection. Thus, the requirement for tamper-resistant caps ensures safety and reliability in outdoor refrigerant line applications.