Description
The MRCOOL DIY® 5th Generation 25 ft. Pre-Charged Quick Connect Line Set is the standard-length refrigerant line set for MRCOOL’s 24K and 36K indoor units. Built for homeowners and HVAC professionals alike, this line set features 3/8″ liquid and 5/8″ suction lines, factory pre-charged with R-454B refrigerant, and sealed for leak-free performance.
Designed for easy installation with MRCOOL DIY 5th Gen single-zone and multi-zone systems, this 25 ft. line set comes equipped with Quick Connect fittings, making it possible to install without vacuum pumps, gauges, or licensed technicians.
🔧 Key Features
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Length: 25 feet – standard for most DIY mini split installations
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Line Sizes: 3/8″ liquid x 5/8″ suction – perfectly sized for 24K & 36K units
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Refrigerant: Pre-charged with eco-friendly R-454B
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Connection: Quick Connect fittings – no vacuuming, brazing, or special tools needed
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Durability: White UV-resistant insulation with robust copper line construction
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Compatible Systems:
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MRCOOL DIY® 5th Gen Single-Zone 24K & 36K
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MRCOOL Multi-Zone Systems: Multi2-18K, Multi3-27K, Multi4-36K, Multi5-48K
(Line set must match the size of each air handler in multi-zone configurations)
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✅ Installation Tips
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This is the default line set length included with most 24K and 36K DIY systems.
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When extending beyond 25 feet, you’ll need a coupler kit and longer control wire (Pro Cable) to complete the connection.
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Follow MRCOOL torque specs for fittings to ensure a proper seal and warranty compliance.
