Mueller Streamline LS-1/4X3/8X1/2X50 Line Set 50 Ft

Product Description

The MUELLER STREAMLINE LS-1/4X3/8X1/2X50 is a pre-insulated refrigerant line set designed for ductless mini-split air conditioning and heat pump installations. It consists of a 1/4-inch liquid line and a 3/8-inch suction line, each wrapped in 1/2-inch insulation, running a total length of 50 feet. The insulation jacket reduces heat gain on the suction line and protects both lines from abrasion and UV exposure in exposed-run installations. This line set ships coiled and is handled by licensed HVAC technicians during mini-split commissioning.

This line set is suited for residential and light-commercial ductless split system installations where the indoor and outdoor units are separated by up to 50 feet of refrigerant piping run. It is commonly used in single-zone and multi-zone applications where the 1/4-inch and 3/8-inch line combination matches the equipment manufacturer's specified connection sizes. The 50-foot length provides flexibility for installations where the condenser is mounted at grade or on a rooftop with a long wall penetration run.

Key Features

• 1/4-inch liquid line and 3/8-inch suction line pre-paired for ductless mini-split use
• 1/2-inch insulation wall on both lines reduces heat transfer and protects against abrasion
• 50-foot run length accommodates longer-distance indoor-to-outdoor unit separations
• Ships coiled for easier routing through walls, ceilings, and line-set covers
• Weighs 10.72 pounds for manageable single-technician handling on most installs

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 3/8-inch suction line configuration. Verify the equipment manufacturer's specified connection and line sizes before installation.

Installation Notes

Installation should be performed by an EPA 608-certified HVAC technician. Power down and lock out the indoor and outdoor units before connecting or disconnecting refrigerant lines. Evacuate the line set to manufacturer-specified micron levels before releasing refrigerant charge. Avoid kinking the copper tubing during uncoiling and routing; use a tube bender for directional changes to maintain proper flow cross-section.