MRCOOL DIY 5th Gen 25 Ft. Pre-Charged Quick Connect Line Set, 1/4" x 3/8", for DIY 6K, 9K, & 12K Indoor Mini Split Air Handler (DIY25-1438-O)

Overview: 25ft 1/4 x 3/8 Lineset for DIY 6K, 9K & 12K Indoor - R454B

The MRCOOL 5th Gen DIY Line Set is a required component for installing your MRCOOL DIY ductless mini-split system. This 25-foot model is pre-charged with environmentally friendly R-454B refrigerant and works with MRCOOL's DIY 5th Gen 6K, 9K and 12K air handler units, featuring 1/4” liquid and 3/8” 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.

Extra Information

• Brand: MRCOOL
• Series: DIY Line Set - R-454B