25-Foot Air Conditioning Tubing Hose Extension: 1/4- and 3/8-Inch Insulated Copper Hoses for Mini-Split Air Conditioners

Key Features

• High-Grade Seamless Copper: Manufactured from premium, specialized refrigeration-grade copper tubing featuring an ultra-smooth inner wall to reduce refrigerant flow resistance, enhance system efficiency, and prevent interior scaling or long-term degradation.

• Pre-Insulated Thermal Protection: Coated in high-density, weather-resistant heat preservation cotton insulation to prevent condensation buildup, protect lines from extreme ambient temperatures, and maximize thermal energy efficiency.

• Flexible and Easy to Bend: Designed with a structural ductility that allows for clean bends and sweeps without kinking, making it highly versatile for complex wall routing, multi-story installations, and localized maintenance.

• Flared Ends with Brass Nuts: Comes pre-equipped with factory-precise flares and durable brass nuts, facilitating a reliable, leak-resistant connection to matching service valves.

Fitment & Compatibility Guide

Pre-Purchase Notice: Please verify your ductless mini-split air conditioner or heat pump system's manual to ensure the liquid and suction line sizes exactly match the dimensions specified below.

Official Application Specifications

Product Specifications

• Part Type: Insulated Refrigerant Line Set / Connecting Pipe

• Tube Material: Deoxidized High-Phosphorus Copper

• Insulation Material: High-Density Heat Preservation PE Foam / Cotton

• Connection Fittings: 1/4" and 3/8" Threaded Brass Hex Nuts

• Condition: 100% Brand New

Package Includes

• 1 × 25FT Insulated Air Conditioning Connection Tube Assembly (As illustrated in product imagery)

Important Mechanical & Installation Notes

• Professional Installation Highly Advised: Connecting refrigerant lines requires specialized tools including vacuum pumps, gauge manifolds, torque wrenches, and structural leak detectors. Installation by a certified HVAC technician is strongly recommended to protect equipment warranties.

• Maintain Bending Radius: When routing the tubing through tight spaces or wall sleeves, utilize a specialized line set bending spring or bending tool to maintain a proper radius and prevent internal crimping or kinking.

• Perform System Evacuation: Before releasing system refrigerant into the newly connected line set, perform a deep vacuum evacuation to clear any remaining atmospheric moisture and non-condensable gases from the circuit.