Mueller Industries MUE-40620250B6 Mini Split Line Set 25 Ft

Product Description

The MUELLER INDUSTRIES MUE-40620250B6 is a pre-insulated refrigerant line set designed for mini split system installations. It includes a 1/4-inch liquid line and a 3/8-inch suction line, both covered with 1/2-inch black insulation. The set ships in a 25-foot length, giving technicians enough run for most residential and light-commercial mini split applications. Constructed from copper tube, it is built to handle the refrigerant flow and pressure demands of modern inverter-driven mini split systems. Licensed HVAC technicians are the primary installers of this product.

This line set is suited for ductless mini split installations in residential and light-commercial settings. It works in single-zone and multi-zone configurations where a 1/4-inch liquid line and 3/8-inch suction line pairing is specified by the equipment manufacturer. Typical applications include wall-mounted, ceiling cassette, and floor-console indoor unit installations where the lineset routes from the indoor head to the outdoor condensing unit. The 25-foot length accommodates standard wall-penetration runs without requiring field fabrication of additional tubing.

Key Features

• 1/4-inch liquid line and 3/8-inch suction line configuration matches common mini split OEM specifications
• 1/2-inch black insulation minimizes heat gain on the suction line and protects against condensation
• 25-foot length suits most residential mini split installations without splicing
• Copper tube construction provides durability and compatibility with common refrigerants used in mini split systems
• Pre-insulated design reduces field labor compared to field-insulating bare copper

Compatibility

Designed as an OEM-style replacement and new-installation line set for ductless mini split systems requiring a 1/4-inch liquid line and 3/8-inch suction line with 1/2-inch insulation.

Installation Notes

Installation should be performed by a licensed HVAC technician holding an EPA Section 608 certification. Shut down and recover any refrigerant from the system before disconnecting existing line sets. Use proper flaring or brazing techniques as required by the equipment manufacturer and applicable mechanical codes. Avoid kinking the copper tubing during uncoiling and routing, as kinks restrict refrigerant flow and can cause system performance issues.

Technical Specifications

• Liquid Line Diameter: 1/4 inches
• Suction Line Diameter: 3/8 inches
• Insulation Thickness: 1/2 inches
• Length: 25 feet
• Insulation Color: Black
• Tube Material: Copper

Standard Information

• Brand: MUELLER INDUSTRIES
• Manufacturer Part Number: MUE-40620250B6