Cerro 406-2-50 Mini Split Lineset 1/4x3/8 50 Ft Insulated

Product Description

The CERRO 406-2-50 is a pre-insulated mini split lineset designed for use in ductless HVAC system installations. It includes both a 1/4 inch liquid line and a 3/8 inch suction line, each insulated with 1/2 inch wall insulation to minimize heat gain and condensation along the refrigerant circuit. The tubing is plain end, meaning field flaring is required at both connections. At 50 feet in length, this lineset suits installations where the indoor air handler is mounted at a moderate distance from the outdoor condensing unit. HVAC technicians working on residential or light commercial ductless systems will find this a direct-use component requiring no additional insulation materials for a standard run.

This lineset is used in ductless mini split system installations where the indoor evaporator unit and outdoor condensing unit require a refrigerant circuit connection. The 50-foot length accommodates wall penetrations, vertical drops, and horizontal runs common in residential installations. Plain end tubing requires the technician to flare each line end on site to match the service port fittings on both the indoor and outdoor units. Both lines arrive fully insulated, reducing field labor associated with sleeving individual copper lines after routing.

Key Features

• 1/4 inch liquid line and 3/8 inch suction line sized for standard mini split systems
• 1/2 inch wall insulation on both lines reduces heat transfer and condensation
• Plain end tubing allows field flaring for direct connection to indoor and outdoor units
• 50-foot length suits moderate-distance residential and light commercial runs
• Both lines insulated from the factory, reducing on-site insulation labor

Compatibility

Designed as an OEM-style replacement or new-installation lineset for residential and light commercial ductless mini split systems requiring a 1/4 inch liquid line and 3/8 inch suction line configuration.

Installation Notes

Installation should be performed by a licensed HVAC technician holding an EPA Section 608 certification, as this work involves a sealed refrigerant circuit. Power down the entire mini split system at the disconnect before making any connections. Use a proper flaring tool to create leak-free flare connections at both the indoor and outdoor unit ports, and pressure-test the line set before evacuating and charging the system. Avoid sharp bends in the copper tubing that could restrict refrigerant flow or crack the insulation jacket.

Technical Specifications

• Liquid Line Diameter: 1/4 inches
• Suction Line Diameter: 3/8 inches
• Insulation Wall Thickness: 1/2 inches
• Lineset Length: 50 feet
• End Type: Plain End (field flare required)
• Insulation Coverage: Both lines insulated

Standard Information

• Brand: CERRO
• Manufacturer Part Number: 406-2-50