MRCOOL DIY® 5th Gen 50 ft. 3/8" x 5/8" Pre-Charged Quick Connect Line Set with DIY Pro Cable (for 24K & 36K Indoor Units)

MRCOOL DIY® 5th Gen 50 ft. 3/8" x 5/8" Pre-Charged Quick Connect Line Set with DIY Pro Cable (for 24K & 36K Indoor Units)

Upgrade your system with the MRCOOL DIY® 5th Generation 50 ft. Pre-Charged Line Set, complete with the matching-length DIY Pro Cable for total compatibility and worry-free installation. Specifically engineered for use with 24,000 BTU and 36,000 BTU indoor air handlers, this line set features 3/8" liquid and 5/8" suction lines and comes pre-charged with R-454B, the latest eco-friendly refrigerant.

Designed for seamless integration with all MRCOOL 5th Gen DIY single-zone systems, this 50' line set also supports multi-zone configurations including:

• Multi3-18K

• Multi4-27K

• Multi5-36K

• Multi6-48K

• Multi6-55K
  (Note: For multi-zone installs, line sets must be matched to the size of each individual air handler.)

🔧 Key Features

• Length: 50 feet – great for long-distance installs or when extending beyond the standard 25'

• Line Sizes: 3/8" liquid line x 5/8" suction line – perfect match for 24K & 36K units

• Pre-Charged with R-454B – No vacuuming, brazing, or special tools required

• Includes DIY Pro Cable – Matching 50 ft. communication/control wire for plug-and-play setup

• Quick Connect Fittings – Patented MRCOOL connectors simplify DIY installation

• Weather-Resistant Design – Durable insulation and copper lines enclosed in a white UV-resistant sleeve

• Compatible with 5th Gen MRCOOL DIY® Single & Multi-Zone Systems

✅ Installation Notes

• If extending beyond 25 feet, you’ll need line set couplers and a longer control wire to ensure full functionality.

• Line set length must be chosen according to system size:

  • For single-zone: match to the total distance required

  • For multi-zone: match each line set to the air handler BTU rating

• Always ensure couplers are properly installed and torque is within MRCOOL’s specifications to maintain warranty compliance.

Order with confidence from MRCOOL DIY Direct – the USA’s most trusted source for MRCOOL systems, parts, and accessories. Whether you're a homeowner or contractor, we make DIY HVAC upgrades simple, reliable, and fast.