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The MUELLER STREAMLINE LS-343830P-08 is a pre-insulated copper refrigerant line set sized at 3/4 inch and 3/8 inch OD and supplied in a 30-foot length. It ships with factory-applied 1/2-inch foam insulation on both lines, reducing job-site labor and helping control condensation and thermal loss from the moment it is installed. Licensed HVAC technicians install this line set to connect the outdoor condensing unit to the indoor evaporator coil in split-system cooling and heat-pump applications. The copper tubing meets standard refrigeration-grade quality expectations for pressure handling and long-term durability in refrigerant service.
This line set is suited for residential split-system air conditioning and heat pump installations where a 30-foot run is required between equipment. The 3/4 inch suction line and 3/8 inch liquid line diameters are a common pairing for mid-range residential cooling capacity systems. The factory-applied insulation is ready to route through walls, attics, and chases without additional field wrapping under normal conditions, making it a practical choice for new installations and equipment replacements.
Designed as an OEM-style replacement and new-installation line set for residential split-system air conditioners and heat pumps requiring a 3/4 inch by 3/8 inch OD line set in a 30-foot run.
Installation should be performed by a licensed HVAC technician holding an EPA Section 608 certification for refrigerant handling. Disconnect and lock out power to both the indoor and outdoor units before connecting or disconnecting any refrigerant lines. After connection, pressure-test and evacuate the line set to the equipment manufacturer's specified vacuum level before charging with refrigerant. Protect the insulation from sharp edges and UV exposure during routing, and seal line-set penetrations through building envelopes per local mechanical code requirements.
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