Mini Split Line Set 25 Ft, 1/4 x 3/8 Insulated Copper

Mini split line set 25 ft helps you connect indoor and outdoor units with reliable refrigerant flow and insulation for efficient HVAC operation. This dual copper tubing bundle includes 1/4 in and 3/8 in O.D. pipes wrapped in triple-layer insulation to protect against moisture, pressure, and temperature loss. Built from thickened copper made to ASTM standards, it resists kinks and flattening during routing for faster, cleaner installs.

• Fits 0–12,000 BTU mini split AC and heat pump systems using 1/4" + 3/8" dual refrigerant lines


• Delivers 25 ft (7620 mm) reach to bridge longer distances between indoor/outdoor units


• Resists kinks with thickened ASTM-standard copper that helps prevent flattening while bending


• Protects lines with triple-layer insulation designed to be waterproof and pressure-resistant


• Includes tie wraps to secure routing and keep the installation neat and stable

Designed for installers and DIY upgrades, this insulated copper line set supports clean routing through tight spaces while helping maintain thermal performance from end to end. The paired high- and low-pressure tubes are sized for common mini split applications, and the multi-layer insulation helps shield the copper from jobsite wear, condensation, and temperature swings. Keep your next mini split or heat pump setup moving by choosing the length and sizes that match your unit—grab yours today.

• Line set length: 25 ft / 7620 mm


• High-pressure pipe O.D.: 1/4 in / 6.35 mm


• Low-pressure pipe O.D.: 3/8 in / 9.53 mm


• Insulation: triple-layer insulated wrap


• Net weight (with accessories): 6.06 lb / 2.75 kg


• Overall package dimensions (L×W×H): 23.22×23.22×1.77 in / 590×590×45 mm


• In the box: insulated dual copper line set, tie wraps