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The MUELLER STREAMLINE LS-783830P-08 is a factory-insulated copper refrigerant line set designed for residential and light-commercial HVAC split-system installations. It consists of a 7/8-inch OD suction line and a 3/8-inch OD liquid line, each wrapped with 1/2-inch wall foam insulation applied at the factory. The 30-foot run length suits typical residential setups where the outdoor condensing unit is positioned at a moderate distance from the indoor air handler. Copper construction meets standard refrigeration tubing specifications, and the pre-insulated configuration reduces field labor by eliminating the need to wrap lines on the job site.
This line set is suited for residential split-system air conditioning and heat pump installations. The 7/8-inch suction line diameter is common for mid-to-larger capacity systems, while the 3/8-inch liquid line supports standard refrigerant flow requirements in those applications. The factory-applied 1/2-inch insulation helps control condensation on the suction line and limits thermal gain over the run, which is critical for maintaining system efficiency. HVAC technicians installing equipment in single-family homes or small multi-family units will find this line set appropriate for typical attic, crawlspace, or exterior routing scenarios.
Designed as an OEM-style replacement or new-installation line set for residential split-system air conditioners and heat pumps requiring a 7/8-inch suction line and 3/8-inch liquid line configuration with a 30-foot run.
Installation should be performed by a licensed HVAC technician holding an EPA Section 608 refrigerant handling certification. Disconnect and lock out power to both the indoor and outdoor units before making any line connections. Support the line set at regular intervals per local mechanical code requirements to prevent sagging and protect the insulation jacket. Avoid kinking the tubing during routing, as deformed sections restrict refrigerant flow and cannot be field-corrected without cutting and rejoining.
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