1/4" x 3/8" x 1/2" 50' Duraguard Mini-Split Copper Line Set

Mueller Duraguard Mini-Split Line Set – 1/4" x 1/2" x 50 ft – Streamline® 40620500B6C The Mueller Duraguard mini-split line set (part number 40620500B6C) is engineered for use in ductless HVAC applications requiring 1/4 inch liquid and 1/2 inch suction copper tubing. This 50-foot line set is constructed from seamless, nitrogen-purged copper tubing manufactured to ASTM B280 specifications using UNS C12200 alloy. It is supplied with factory-applied Duraguard UV™ insulation, designed for long-term exposure to outdoor elements. Product Details Liquid Line OD: 1/4 inch Suction Line OD: 1/2 inch Length: 50 feet Material: Seamless copper (UNS C12200), nitrogen-charged Insulation: 1/2 inch closed-cell polyethylene foam (Duraguard UV™) Pressure Rating: Rated up to 700 psi Temperature Rating: -40°F to 250°F Refrigerant Compatibility: Compatible with R-410A, R-32, and other high-pressure refrigerants Standard Compliance: ASTM B280, UL-listed Application: Ductless mini-split HVAC installations Performance Features Pre-Insulated Tubing: Reduces installation time and thermal loss; maintains vapor seal UV and Weather Resistance: Outer insulation jacket resists degradation from sunlight and moisture Clean Internal Bore: Nitrogen-charged and capped to prevent oxidation before installation Flexible Handling: Tubing is coiled for easy routing through wall sleeves and chases Pressure-Ready: Rated for high-pressure refrigerants used in modern mini-split systems Professional Use Notes This line set is suitable for both residential and light commercial systems. Tubing ends are ready for field termination via flaring or brazing as required by equipment manufacturer specifications. Ensure insulation joints are sealed to maintain a closed vapor barrier. Field installation should be completed by a licensed HVAC technician to ensure compliance with EPA Section 608 and local building codes.