Cambridge 221982 Mini Split Lineset 0.25x0.5 in 25 Ft

Product Description

The CAMBRIDGE 221982 is a pre-insulated mini split lineset designed to connect the indoor air handler to the outdoor condensing unit in ductless mini split systems. The lineset includes a 0.25-inch liquid line and a 0.5-inch suction line, both protected by Armashield insulation for thermal efficiency and moisture resistance. Double flare nuts are pre-installed on both lines for a secure, leak-resistant connection at the service valves. This lineset ships without communication or power wire, making it appropriate for systems that route wiring separately. HVAC technicians install this lineset during new mini split installations or refrigerant line replacements.

The 221982 lineset is suited for residential and light-commercial ductless mini split installations where a 25-foot line run is required. The 0.25-inch by 0.5-inch line diameter pairing is a common configuration for single-zone mini split systems in the 9,000 to 18,000 BTU/h range. The Armashield insulation jacket helps maintain system efficiency by minimizing heat gain on the suction line and heat loss on the liquid line across the full 25-foot run.

Key Features

• 25-foot pre-cut lineset length for standard single-zone mini split runs
• 0.25-inch liquid line and 0.5-inch suction line diameter pairing
• Pre-installed double flare nuts on both lines for secure valve connections
• Armashield insulation jacket on both lines for thermal protection
• No wire included — supports separate wiring routing configurations

Compatibility

Designed as an OEM-style replacement or new-installation lineset for residential and light-commercial ductless mini split systems requiring a 0.25-inch by 0.5-inch line pair at a 25-foot run length.

Installation Notes

Installation should be performed by a licensed HVAC technician certified to handle refrigerant per EPA Section 608 requirements. Shut off and lock out power to both the indoor and outdoor units before making any line connections. Inspect flare seats and double flare nuts before torquing connections to service valve specifications provided by the equipment manufacturer. Avoid sharp bends in the copper lines during routing to prevent restriction or kinking.

Technical Specifications

• Liquid Line Diameter: 0.25 inches
• Suction Line Diameter: 0.5 inches
• Lineset Length: 25 feet
• Insulation Type: Armashield
• Flare Nut Type: Double Flare
• Wire Included: No
• Package Dimensions: 12.5 inches

Standard Information

• Brand: CAMBRIDGE
• Manufacturer Part Number: 221982