Mueller Streamline LS-MS381450P Mini-split Line Set 50 Ft

Product Description

The MUELLER STREAMLINE LS-MS381450P is a contractor-packaged refrigerant line set designed for ductless mini-split installations. The set includes a 50-foot suction line measuring 3/8 inches in diameter with factory-applied 1/2-inch closed-cell insulation and a 50-foot liquid line measuring 1/4 inches in diameter. Both lines are supplied as a matched pair and arrive factory flared on both ends with flare nuts included, enabling direct connection to ductless equipment without additional field prep. Licensed HVAC technicians install this line set during single-zone ductless system commissioning where extended line runs are required.

This line set is suited for residential and light commercial single-zone ductless mini-split applications requiring up to 50 feet of refrigerant line routing. The contractor pack format is intended for HVAC technicians who stock line sets in bulk or perform repeat ductless installations. The matched suction and liquid line pair reduces job-site assembly time and supports consistent installation quality across multiple units. Technicians must verify allowable run length, elevation change limits, and flare fitting compatibility against the equipment manufacturer specifications before installation.

Key Features

• 50-foot suction line at 3/8 inches diameter with factory-applied 1/2-inch insulation
• 50-foot liquid line at 1/4 inches diameter supplied as a matched pair
• Factory flared on both ends with flare nuts included for direct equipment connection
• Contractor pack format designed for bulk stocking and repeat ductless installations
• Eliminates field flaring on both lines, reducing installation prep time

Compatibility

Designed as a standard OEM-style replacement and new-installation line set for single-zone residential and light commercial ductless mini-split systems. Technicians must confirm flare size compatibility and maximum allowable run length with the specific equipment manufacturer before installation.

Installation Notes

Installation is performed by licensed HVAC technicians in accordance with applicable mechanical codes and the equipment manufacturer instructions. Power down the indoor and outdoor units and recover any existing refrigerant charge before disconnecting or connecting refrigerant lines. Verify flare nut torque requirements and flare seat condition before completing connections to avoid leaks. Do not exceed the equipment manufacturer maximum allowable line length or elevation change specifications.

Technical Specifications

• Suction Line Diameter: 3/8 inches
• Liquid Line Diameter: 1/4 inches
• Line Length: 50 feet
• Insulation Thickness: 1/2 inch (suction line)
• End Preparation: Factory flared both ends, flare nuts included
• Package Type: Contractor Pack

Standard Information

• Brand: MUELLER STREAMLINE
• Manufacturer Part Number: LS-MS381450P