MRCOOL DIY® 5th Gen 16 ft. 1/4" x 1/2" Pre-Charged Quick Connect Line Set (for 9K, 12K & 18K Indoor Units)

MRCOOL DIY® 5th Gen 16 ft. 1/4" x 1/2" Pre-Charged Quick Connect Line Set (for 9K, 12K & 18K Indoor Units)

The MRCOOL DIY® 5th Generation 16 ft. Pre-Charged Line Set is the perfect solution for shorter HVAC installations involving 9,000 BTU, 12,000 BTU, or 18,000 BTU MRCOOL indoor units. With 1/4" liquid and 1/2" suction lines, this compact line set is pre-charged with eco-friendly R-454B refrigerant and sealed with MRCOOL's exclusive Quick Connect fittings — eliminating the need for vacuum pumps, gauges, or HVAC licenses.

Whether you're setting up a single-zone DIY mini split or connecting to a multi-zone system, this 16 ft. line set provides a clean, secure, and reliable installation for close-proximity condenser-to-air handler configurations.

🔧 Key Features

• Length: 16 feet – ideal for tight installs or wall-mounted outdoor units

• Line Sizes: 1/4" liquid x 1/2" suction – built for 9K, 12K, and 18K BTU indoor units

• Pre-Charged with R-454B Refrigerant – No field charging or vacuuming needed

• Quick Connect Fittings – Patented DIY connection system for leak-free installation

• Durable Insulation – UV-resistant white sleeve with insulated copper tubing

• System Compatibility:

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

  • MRCOOL Multi-Zone Condensers: Multi2-18K, Multi3-27K, Multi4-36K, Multi5-48K
    (Must match line set size to air handler BTU rating for multi-zone applications)

✅ Installation Notes

• Ideal when the indoor and outdoor units are located in close proximity

• For runs longer than 25 ft., use line set couplers and longer Pro Cable (sold separately)

• Ensure all connections follow MRCOOL’s installation guidelines and torque specifications

MRCOOL DIY Direct is the most trusted source for MRCOOL systems, parts, and accessories nationwide. This 16 ft. pre-charged line set is the go-to choice for compact installations and efficient DIY performance without the hassle.