3/8" x 7/8" x 1/2" 50' Duraguard Mini-Split Copper Line Set

Mueller® 61420500C – 1/4" OD x 50 ft ACR Copper Tube Coil, Nitrogen-Charged Mueller® 61420500C is a 50-foot coil of 1/4-inch outside diameter Type ACR copper tubing, manufactured from seamless UNS C12200 copper alloy. This tube is nitrogen-charged and fully compliant with ASTM B280 requirements, making it suitable for use in HVAC and refrigeration line set applications. Rated for continuous operating pressures up to 700 psi and temperatures up to 250°F, this tubing supports high-pressure refrigerants such as R-410A and R-32. Each coil is processed to prevent internal oxidation, maintaining system cleanliness during installation and brazing. The flexible format allows easier routing around obstructions in residential and light commercial systems. Product Specifications Outside Diameter: 1/4 inch Length: 50 feet Copper Type: Seamless, UNS C12200 Cleaning Method: Nitrogen-purged Max Working Pressure: 700 psi Temperature Rating: 250°F Standards Compliance: ASTM B280 Applications: Liquid line in HVAC/R systems Refrigerant Compatibility: R-410A, R-32, other common refrigerants Features Delivered sealed and nitrogen-filled to maintain internal cleanliness Seamless copper construction resists corrosion and mechanical stress Designed for high-pressure refrigerant service Compatible with brazed connections Ideal for long-radius bends and compact installations Installation Notes This tubing is intended for installation by licensed HVAC technicians trained in brazing and refrigerant handling procedures. Maintain nitrogen purge during brazing to ensure system integrity and prevent scaling. Follow local codes and best practices for copper tube installation.