Mueller Streamline LS-MS121450P Mini-split Line Set 50 Ft

Product Description

The MUELLER STREAMLINE LS-MS121450P is a matched refrigerant line set designed for ductless mini-split installations requiring longer routing distances. The set includes a 50-foot suction line measuring 1/2 inch in diameter with 1/2 inch factory-applied insulation, paired with a 50-foot liquid line measuring 1/4 inch in diameter. Both lines arrive factory flared on both ends with flare nuts included, eliminating the need for field flaring and reducing jobsite prep time. This contractor pack is intended for HVAC technicians stocking line sets for repeat single-zone ductless installations where consistent, ready-to-install components improve workflow efficiency.

This line set is suited for residential and light commercial single-zone ductless mini-split installations where system routing requires a full 50-foot run. The 1/2 inch suction line and 1/4 inch liquid line pairing is a common size configuration for many single-zone ductless systems. Packaged as a contractor supply unit, this set supports technicians who install ductless equipment regularly and need jobsite-ready components that minimize field fabrication steps. Verify allowable run length, elevation change limits, and flare fitting compatibility with the specific equipment being installed before use.

Key Features

• 50-foot suction line at 1/2 inch diameter with 1/2 inch factory-applied insulation
• 50-foot liquid line at 1/4 inch diameter included as a matched pair
• Factory flared on both ends with flare nuts included for direct equipment connection
• Contractor pack format reduces jobsite prep time for repeat ductless installations
• Designed for single-zone mini-split systems requiring extended line routing

Compatibility

Designed as an OEM-style replacement and new-installation line set for residential single-zone ductless mini-split systems using a 1/4 inch liquid line and 1/2 inch suction line configuration. Verify flare fitting size and allowable run specifications with the equipment manufacturer before installation.

Installation Notes

Installation should be performed by a licensed HVAC technician in compliance with applicable mechanical codes and EPA Section 608 refrigerant handling regulations. Power down and disconnect the mini-split system completely before connecting or disconnecting refrigerant lines. Inspect factory flares for damage before making connections, and confirm flare nut torque specifications with the equipment manufacturer. Do not exceed the equipment manufacturer's stated maximum line length or elevation change limits for the installed unit.

Technical Specifications

• Suction Line Diameter: 1/2 inch
• Liquid Line Diameter: 1/4 inch
• Line Length: 50 feet
• Insulation Thickness: 1/2 inch
• End Connections: Factory flared both ends, flare nuts included
• Application: Single-zone ductless mini-split
• Package Type: Contractor Pack

Standard Information

• Brand: MUELLER STREAMLINE
• Manufacturer Part Number: LS-MS121450P