The Carrier / Carlyle Plug, O-Ring is a critical sealing component used in refrigeration and HVAC systems to ensure leak-proof connections. The plug features an integrated O-ring that provides a secure, durable seal, preventing refrigerant or fluid leaks at connection points. Made from high-quality materials, this plug is designed for easy installation and reliable performance, contributing to the overall efficiency and longevity of the system. It helps maintain proper system pressure and integrity during installation, maintenance, or repair processes.