MRCOOL DIY® 5th Gen 50 ft. 1/4" x 1/2" Pre-Charged Quick Connect Line Set with DIY Pro Cable (for 9K, 12K & 18K Indoor Units)

MRCOOL DIY® 5th Gen 50 ft. 1/4" x 1/2" Pre-Charged Quick Connect Line Set with DIY Pro Cable (for 9K, 12K & 18K Indoor Units)

When your installation requires extra distance, the MRCOOL DIY® 5th Generation 50 ft. Pre-Charged Quick Connect Line Set delivers the reach and reliability you need. Designed specifically for 9,000 BTU, 12,000 BTU, and 18,000 BTU indoor units, this extended line set features 1/4" liquid and 1/2" suction lines, pre-charged with R-454B refrigerant, and sealed with MRCOOL’s innovative Quick Connect fittings for an easy, tool-free installation.

This bundle also includes a matching 50 ft. DIY Pro Cable, making it the complete solution for powering and connecting your indoor unit to the outdoor condenser when standard lengths won’t suffice.

🔧 Key Features

• Line Set Length: 50 feet – ideal for long-distance HVAC installations

• Line Sizes: 1/4" liquid x 1/2" suction – sized for 9K, 12K, and 18K indoor air handlers

• Includes DIY Pro Cable: 50 ft. control wire for plug-and-play connectivity

• Pre-Charged with R-454B Refrigerant – No vacuuming, brazing, or gauges required

• Quick Connect Fittings: DIY-friendly, factory-sealed for a secure, leak-free installation

• Durable Design: White UV-resistant insulation for both indoor and outdoor use

• System Compatibility:

  • MRCOOL DIY® 5th Gen 9K, 12K & 18K single-zone systems

  • MRCOOL Multi-Zone DIY Systems: Multi2-18K, Multi3-27K, Multi4-36K, Multi5-48K
    (Line set size must match air handler BTU rating in multi-zone configurations.)

✅ Installation Notes

• Ideal for extended runs where the outdoor condenser is farther than 25–35 ft. from the air handler

• To connect multiple line sets, use MRCOOL line set couplers and ensure Pro Cable length matches the total run

• Always follow MRCOOL torque specifications and setup instructions to maintain system integrity and warranty

MRCOOL DIY Direct is your trusted nationwide source for MRCOOL systems, accessories, and support. Whether you're a DIY homeowner or professional installer, this 50 ft. pre-charged line set with control wire offers the perfect combination of performance, convenience, and compatibility for your ductless mini split installation.