The Carrier / Carlyle Expansion Plug is an important component used in refrigeration and HVAC systems to seal and secure openings in the system’s components. Typically used to prevent leaks or control fluid flow, it provides a reliable barrier during the system’s operation. Made from durable materials, the expansion plug is designed to withstand high pressures and temperatures, contributing to the overall efficiency and longevity of the system by maintaining secure and leak-free performance.