Mueller Streamline LS-1/4X3/8X1/2X25 Line Set 25 Ft

Product Description

The MUELLER STREAMLINE LS-1/4X3/8X1/2X25 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, both factory-insulated with 1/2-inch thick insulation and supplied in a 25-foot length. The copper lines carry refrigerant between the indoor air handler and the outdoor condensing unit. Licensed HVAC technicians install this line set during new mini-split system commissioning or when replacing damaged refrigerant lines on existing systems.

This line set is suited for residential and light commercial ductless mini-split installations where a 25-foot run is needed between the indoor and outdoor units. The 1/4-inch by 3/8-inch line sizing matches the port connections common on single-zone mini-split systems. The factory-applied insulation helps reduce thermal loss and condensation on the suction line during operation, making this a ready-to-install solution for standard ductless installations.

Key Features

• 1/4-inch liquid line and 3/8-inch suction line in a single pre-paired set
• 1/2-inch thick insulation factory-applied to both lines
• 25-foot length suitable for standard single-zone mini-split runs
• Copper construction for refrigerant-grade durability and compatibility
• Ready-to-install format reduces field fabrication time

Compatibility

Designed as an OEM-style replacement and new-installation line set for ductless mini-split systems requiring 1/4-inch liquid and 3/8-inch suction line connections with a 25-foot run length.

Installation Notes

Installation should be performed by a licensed HVAC technician in accordance with local mechanical codes and the system manufacturer's instructions. Recover and evacuate any existing refrigerant charge before disconnecting old line sets, following EPA Section 608 requirements. Flare or braze connections per the system manufacturer's specifications, and pressure-test the completed line set before evacuating and charging the system. Avoid kinking the copper lines during uncoiling and routing.

Technical Specifications

• Liquid Line Diameter: 1/4 inch
• Suction Line Diameter: 3/8 inch
• Insulation Thickness: 1/2 inch
• Length: 25 feet
• Package Length: 32.5 inches
• Package Width: 32.5 inches
• Package Height: 3 inches
• Weight: 5.36 pounds

Standard Information

• Brand: MUELLER STREAMLINE
• Manufacturer Part Number: LS-1/4X3/8X1/2X25