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

MRCOOL DIY® 5th Gen 16 ft. 1/4" x 1/2" Pre-Charged Quick Connect Line Set (for 18K Indoor Units)The MRCOOL DIY 5th Generation 16 ft. Pre Charged Line Set is specifically designed for 18,000 BTU indoor air handlers. Featuring 1 4" liquid and 1 2" suction lines, this line set comes factory pre charged with eco friendly R 454B refrigerant and equipped with MRCOOLs exclusive Quick Connect fittings eliminating the need for vacuum pumps, gauges, or HVAC licensing. Perfect for short run installations where the condenser and air handler are close

The MRCOOL DIY® 5th Generation 16 ft. Pre-Charged Line Set is specifically designed for 18,000 BTU indoor air handlers. Featuring 1/4" liquid and 1/2" suction lines, this line set comes factory pre-charged with eco-friendly R-454B refrigerant and equipped with MRCOOL’s exclusive Quick Connect fittings — eliminating the need for vacuum pumps, gauges, or HVAC licensing.

Perfect for short-run installations where the condenser and air handler are close together, this 16 ft. line set ensures a clean, reliable, and leak-proof connection. Whether part of a single-zone 18K DIY mini split or a compatible multi-zone system, it’s the ideal choice for efficient performance and true DIY installation.

🔧 Key Features

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

• Line Sizes: 1/4" liquid x 1/2" suction – specifically for 18K BTU indoor units

• Pre-Charged with R-454B Refrigerant – no vacuuming or field charging required

• 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 18K units

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

✅ Installation Notes

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

• For longer runs: use multiple pre-charged line sets, with line set couplers and longer Pro Cable (sold separately)

• Follow MRCOOL’s installation guidelines and torque specifications for proper sealing

MRCOOL DIY Direct is the USA’s most trusted source for MRCOOL systems, parts, and accessories. This 16 ft. pre-charged line set is the go-to choice for compact 18K installations, delivering efficiency, convenience, and professional-grade performance for the DIY installer.