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The MUELLER INDUSTRIES ac05020 is a nitrogenized ACR (Air Conditioning and Refrigeration) copper tube designed for use in HVAC and refrigeration systems. Manufactured from C12200 copper and conforming to ASTM B280, this tube is pressurized with nitrogen to inhibit internal oxide formation during brazing operations. Reducing oxide buildup lowers the risk of system contamination in refrigerant circuits. The tube measures 3/4 inch OD at 20 feet in length and weighs 0.362 pounds. Licensed HVACR technicians and refrigeration mechanics rely on ACR-grade tube for its cleanliness, dimensional precision, and material strength under operating conditions.
This tube is suited for residential and light commercial HVAC installations, refrigeration equipment, and split-system applications where clean, oxide-free refrigerant lines are required. The nitrogenized interior is particularly beneficial in systems using modern refrigerants where even minor contamination can degrade compressor performance or damage TXV components. It is appropriate for new installations and service replacement work where ACR-grade material is specified.
Designed as an OEM-style ACR copper tube for use in residential and commercial HVAC and refrigeration systems where ASTM B280-compliant, nitrogenized copper tube is specified.
Installation should be performed by a licensed HVACR technician. Ensure the refrigerant system is fully recovered and de-pressurized before cutting or brazing any existing lines. Use appropriate brazing alloy and maintain nitrogen purge flow through the tube during brazing to preserve the clean interior. Work should comply with applicable mechanical codes and local jurisdiction requirements.
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