MRCOOL DIY 5th Gen 50 Ft. Pre-Charged Quick Connect Line Set with DIY Pro Cable, 1/4" x 1/2", for DIY 18K Mini Split Indoor Air Handler (DIY50-1412C-O)

The MRCOOL 5th Gen DIY Line Set is a required component for installing your MRCOOL DIY ductless mini-split system. This 50-foot model is pre-charged with environmentally friendly R-454B refrigerant and works with MRCOOL's DIY 5th Gen 18K air handler units, featuring 1/4” liquid and 1/2” suction lines.

Equipped with Quick Connect fittings, the line set allows for fast, tool-free installation—no vacuuming, charging, or special certifications needed. Built with durable, kink-resistant materials and a leak-proof design, it ensures long-lasting, efficient performance. Available in multiple lengths, it’s the key to making your HVAC setup truly DIY-friendly.