MRCOOL DIY® 5th Gen 35 ft. 1/4" x 1/2" Pre-Charged Quick Connect Line Set with DIY Pro Cable (for 18K Indoor Units)

MRCOOL DIY® 5th Gen 35 ft. 1/4" x 1/2" Pre-Charged Quick Connect Line Set with DIY Pro Cable (for 18K Indoor Units)

Extend your installation range with the MRCOOL DIY® 5th Generation 35 ft. Pre-Charged Line Set, specifically designed for 18,000 BTU indoor air handlers. Featuring 1/4" liquid and 1/2" suction lines, this line set is factory pre-charged with R-454B refrigerant and includes MRCOOL’s patented Quick Connect fittings for a fast, tool-free installation.

Also included is a matching 35 ft. length of MRCOOL DIY Pro Cable, ensuring proper thermostat communication and power connectivity when extending your system beyond the standard 25 ft.

This line set is compatible with both single-zone and multi-zone MRCOOL DIY 5th Gen systems, and is ideal for longer ductless installations where the outdoor unit is farther away.

🔧 Key Features

• Length: 35 feet – extended reach for flexible installation

• Line Sizes: 1/4" liquid line x 1/2" suction line – optimized for 18K air handlers

• Includes 35 ft. DIY Pro Cable – Matching control wire for plug-and-play operation

• Pre-Charged with R-454B – Sealed and ready for installation with no need for vacuuming or gauges

• Quick Connect Fittings – Simplifies installation for homeowners and professionals

• UV-Resistant Insulation – Durable white protective sleeve for indoor and outdoor use

• System Compatibility:

  • MRCOOL DIY® 5th Gen Single-Zone: 18K

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

✅ Installation Notes

• Ideal for installations where the condenser is 35 feet or less from the air handler

• If combining line sets or extending beyond 35 ft., you'll need couplers and longer DIY Pro Cable

• Always follow MRCOOL torque specifications and guidelines to ensure leak-free operation and preserve warranty

Buy with confidence from MRCOOL DIY Direct – the USA’s most trusted source for genuine MRCOOL products, DIY HVAC solutions, and expert-level support. Whether you're installing a new unit or extending an existing one, this line set and cable bundle offers everything you need for a reliable, professional-grade setup.