Mueller 61220500C Copper Line Set – 3/8" x 3/4" x 1/2" x 50' DuraGuard Coated, Nitrogen-Charged

The Mueller 61220500C Copper Line Set is a refrigeration-grade, nitrogen-charged seamless copper tube assembly engineered for HVAC and refrigeration systems requiring high mechanical strength and internal cleanliness. Manufactured from UNS C12200 deoxidized copper, the tubing is produced to ASTM B280 standards and supplied with nitrogen pressurization to prevent oxidation during storage and handling. The DuraGuard™ coated exterior provides added resistance to abrasion and environmental exposure in both indoor and outdoor installations.

Details

• Manufacturer: Mueller Industries
• Model Number: 61220500C
• Product Type: Refrigeration-Grade Copper Line Set
• Configuration: 3/8" Liquid Line x 3/4" Suction Line x 1/2" Insulation x 50' Length
• Material: Seamless Copper Tube – UNS C12200 (Deoxidized, Phosphorus)
• Manufacturing Standard: ASTM B280 – ACR (Air Conditioning and Refrigeration) Specification
• Internal Charge: Nitrogen-charged to maintain oxide-free interior surfaces
• Exterior Protection: DuraGuard™ Coating – corrosion and abrasion resistant
• Working Pressure: Up to 700 psi (refrigeration system rating)
• Maximum Service Temperature: 250°F (121°C)
• Wall Type: Seamless drawn
• Length: 50 feet (15.24 m) coil
• Color: Natural copper with protective coating
• Ends: Capped and nitrogen-sealed
• Refrigerant Compatibility: R-410A, R-32, R-22, and similar refrigerants
• Pressure Rating Standard: Conforms to high-pressure refrigerant system requirements
• Installation Type: Field-brazed or flared connection compatible
• Corrosion Resistance: High – DuraGuard polymer coating and non-oxidized interior
• Compliance: ASTM B280, UL Recognized, RoHS Compliant

Technical Application

The Mueller 61220500C ACR copper tubing line set is engineered for installation in HVAC and refrigeration systems requiring precision-brazed or flared joints. The nitrogen-charged seamless construction ensures an oxide-free interior surface, preventing contamination and maintaining refrigerant system purity. The DuraGuard coating adds mechanical durability and environmental protection during installation through walls, attics, or outdoor runs. The tubing supports working pressures up to 700 psi, suitable for high-efficiency systems utilizing R-410A, R-32, or equivalent refrigerants. This line set meets professional requirements for residential, light commercial, and industrial cooling and heat pump applications.

Specifications

• Outer Diameter (Liquid Line): 3/8 inch (9.53 mm)
• Outer Diameter (Suction Line): 3/4 inch (19.05 mm)
• Insulation Thickness: 1/2 inch (12.7 mm)
• Coil Length: 50 feet (15.24 meters)
• Material Grade: UNS C12200 Copper (phosphorus-deoxidized, non-arsenical)
• Manufacturing Process: Seamless drawn tube, nitrogen-purged
• Working Pressure: 700 psi maximum
• Maximum Service Temperature: 250°F (121°C)
• Coating: DuraGuard™ protective exterior jacket
• Internal Treatment: Nitrogen-purged and sealed
• Compatibility: R-410A, R-32, R-22, and similar refrigerants
• Applicable Standards: ASTM B280, UL Recognized
• Packaging: Coiled, capped, and sealed for cleanliness
• Intended Use: Refrigeration and air conditioning service line installations

Summary

The Mueller 61220500C Copper Line Set (3/8" x 3/4" x 1/2" x 50') delivers high-quality, nitrogen-charged ACR tubing manufactured to ASTM B280 standards for HVAC and refrigeration service. Constructed from seamless C12200 copper and protected with DuraGuard coating, it provides superior corrosion resistance, mechanical durability, and internal cleanliness. The line set supports high-pressure refrigerants such as R-410A and R-32, ensuring reliable performance and compliance with professional mechanical installation standards.