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The MUELLER STREAMLINE 00621000c is a pre-insulated refrigerant suction line designed for HVAC line set installations where long-term UV and weather resistance are required. The copper tube is wrapped in Duraguard elastomeric rubber insulation featuring a polymeric outer jacket that resists abrasion, tearing, solar degradation, and general weathering. This line measures 3/8 inches OD with 1/2 inch wall insulation (R3) and runs 100 feet, making it suitable for standard residential split-system installations. Licensed HVAC technicians handling outdoor refrigerant line routing will find this product built for exposed conditions that standard insulation cannot handle.
This suction line is intended for residential and light commercial split-system HVAC applications where the line set runs in exposed outdoor environments, including roof-mounted equipment, wall-mounted mini-split installations, and other setups subject to direct sunlight and physical contact. The 100-foot coil length accommodates longer runs without splicing. The insulation maintains the same thermal performance as standard elastomeric foam while adding a hardened outer jacket for installations that demand durability beyond typical indoor-rated materials.
Designed as an OEM-style replacement or new-installation suction line for residential and light commercial split-system HVAC line sets requiring a 3/8 inch OD copper tube with UV-resistant insulation.
Installation should be performed by a licensed HVAC technician in accordance with local mechanical codes and manufacturer guidelines. Shut down and recover all refrigerant from the system before cutting or connecting any refrigerant tubing. Use proper tube cutting and flaring or brazing tools appropriate for ACR copper. Secure the line set at intervals per code to prevent vibration contact with surfaces that could abrade the jacket over time.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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