MRCOOL DIY 5th Gen 16 Ft. Pre-Charged Quick Connect Line Set, 3/8" x 5/8", for DIY 24K & 36K Mini Split Indoor Air Handler (DIY16-3858-O)

The MRCOOL 5th Gen DIY Line Set is a required component for installing your MRCOOL DIY ductless mini-split system. This 16-foot model is pre-charged with environmentally friendly R-454B refrigerant and works with MRCOOL's DIY 5th Gen 24K and 36K air handler units, featuring 3/8” liquid and 5/8” 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.