MRCOOL DIY® 5th Gen 50 ft. 1/4" x 3/8" Pre-Charged Quick Connect Line Set with DIY Pro Cable (for 6K - 9k - 12k Indoor Units)

MRCOOL DIY® 5th Gen 50 ft. 1/4" x 3/8" Pre-Charged Quick Connect Line Set with DIY Pro Cable (for 6K - 9k - 12k Indoor Units)MRCOOL DIY 5th Gen 50 ft. 1 4" x 3 8" Pre Charged Quick Connect Line Set (for 6K Indoor Units) The MRCOOL DIY 5th Generation 50 ft. Pre Charged Line Set is the ideal solution for installations of 6,000 BTU, 9,000 BTU, and 12,000 BTU indoor mini split units. Featuring 1 4" liquid and 3 8" suction lines, this long run line set is pre charged with R 454B refrigerant and sealed with MRCOOLs patented Quick Connect fittings allowing for a true DIY

MRCOOL DIY® 5th Gen 50 ft. 1/4" x 3/8" Pre-Charged Quick Connect Line Set (for 6K Indoor Units)

The MRCOOL DIY® 5th Generation 50 ft. Pre-Charged Line Set is the ideal solution for installations of 6,000 BTU, 9,000 BTU, and 12,000 BTU indoor mini split units. Featuring 1/4" liquid and 3/8" suction lines, this long-run line set is pre-charged with R-454B refrigerant and sealed with MRCOOL’s patented Quick Connect fittings — allowing for a true DIY installation without special tools, gauges, or vacuum pumps.

Whether you’re working with a 5th Gen single-zone unit or a multi-zone DIY condenser with a 6K air handler, this 50 ft. line set provides the extra reach you need without sacrificing performance or efficiency.

🔧 Key Features

• Length: 50 feet – designed for long-distance HVAC installations

• Line Sizes: 1/4" liquid x 3/8" suction – sized for MRCOOL 6K, 9K, and 12K indoor units

• Pre-Charged with R-454B – Eco-friendly refrigerant sealed and ready for use

• Quick Connect Fittings – MRCOOL’s DIY-friendly connection system eliminates guesswork

• High-Quality Materials – Copper lines with white UV-resistant insulation for clean indoor and outdoor runs

• System Compatibility:

  • MRCOOL DIY® 5th Gen 9K, 12K single-zone mini split systems

  • MRCOOL Multi-Zone Condensers: Multi2-18K, Multi3-27K, Multi4-36K, Multi5-48K
    (For multi-zone, line set must match air handler BTU rating.)

✅ Installation Tips

• Ideal for long runs through attics, basements, or along larger exterior walls

• When extending beyond 25 feet, always ensure you're using the correct Pro Cable length and consider coupler kits if combining with other line sets

• Follow MRCOOL’s torque and connection guidelines for leak-free operation and warranty compliance

Buy with confidence from MRCOOL DIY Direct — America’s #1 trusted source for MRCOOL HVAC systems, parts, and accessories. This 50 ft. pre-charged line set gives you the flexibility and performance you need for larger installs without the hassle of hiring a contractor.