Mueller Industries MUE-40820250B6 Mini Split Line Set

Product Description

The MUELLER INDUSTRIES MUE-40820250B6 is a plain-end mini split line set manufactured from C12200 copper tube. It features a 1/4-inch liquid line and a 1/2-inch suction line, with both lines covered in 1-inch-wall elastomeric (black) insulation. The line set meets ASTM B1003 and is rated to UL 700 psi, making it a code-compliant choice for refrigerant piping installations. HVAC technicians use this line set to connect the indoor air handler to the outdoor condensing unit in ductless mini split systems. No flare fittings, cable gauge, or thermostat wire are included on this configuration.

This line set is suited for residential and light-commercial ductless mini split installations where a plain-end termination is required, allowing the installing technician to field-fabricate the end connections to match the equipment. The 1/4-inch liquid line and 1/2-inch suction line diameters are common sizing for many single-zone and multi-zone mini split systems. Both lines arrive pre-insulated with elastomeric foam, reducing field labor for insulation wrap on exposed or interior runs.

Key Features

• C12200 copper construction meeting ASTM B1003 standard for refrigeration tube
• Rated to UL 700 psi for reliable, code-compliant refrigerant service
• 1/4-inch liquid line and 1/2-inch suction line sizing for standard mini split applications
• 1-inch-wall elastomeric (black) insulation on both lines, factory-applied
• Plain-end termination for field-fabricated flare or swage connections
• No 90-degree pre-bends, allowing flexible routing on the job site

Compatibility

Designed as an OEM-style replacement or new-installation line set for ductless mini split systems requiring a 1/4-inch liquid line and 1/2-inch suction line with plain-end terminations.

Installation Notes

Installation should be performed by a licensed HVAC technician holding the appropriate EPA Section 608 refrigerant handling certification. Shut down and isolate the mini split system before connecting or disconnecting any refrigerant lines. Plain ends require field flaring or brazing per the equipment manufacturer instructions and applicable mechanical codes. Inspect the copper tube for kinks or ovality before pulling and routing through walls or conduit.

Technical Specifications

• Line Set Type: Mini Split Line Set
• Material: C12200 Copper
• Liquid Line Size: 1/4 inches
• Suction Line Size: 1/2 inches
• Insulation Material: Elastomeric (black)
• Insulation Wall Thickness: 1 inch
• Customization: Both Lines Insulated
• End Type: Plain End
• 90 Degree Bends: No
• Pressure Rating: UL 700 psi
• Standards: ASTM B1003
• Weight: 6.57 pounds

Standard Information

• Brand: MUELLER INDUSTRIES
• Manufacturer Part Number: MUE-40820250B6