MRCOOL DIY® 5th Gen 25 ft. 1/4" x 3/8" Pre-Charged Quick Connect Line Set (for 6K - 9k - 12k Indoor Units)

MRCOOL DIY® 5th Gen 25 ft. 1/4" x 3/8" Pre-Charged Quick Connect Line Set (for 6K - 9k - 12k Indoor Units)MRCOOL DIY 5th Gen 25 ft. 1 4" x 3 8" Pre Charged Quick Connect Line Set (for 6K 9K 12K Indoor Units) The MRCOOL DIY 5th Generation 25 ft. Pre Charged Line Set is the standard line length for 6,000 9,000 12,000 BTU mini split air handlers. Featuring 1 4" liquid and 3 8" suction lines, this set is pre charged with R 454B refrigerant and uses MRCOOLs patented Quick Connect fittings to ensure a safe, tool free installation without the need for vacuum

MRCOOL DIY® 5th Gen 25 ft. 1/4" x 3/8" Pre-Charged Quick Connect Line Set (for 6K - 9K - 12K Indoor Units)

The MRCOOL DIY® 5th Generation 25 ft. Pre-Charged Line Set is the standard line length for 6,000 -9,000 - 12,000 BTU mini split air handlers. Featuring 1/4" liquid and 3/8" suction lines, this set is pre-charged with R-454B refrigerant and uses MRCOOL’s patented Quick Connect fittings to ensure a safe, tool-free installation without the need for vacuum pumps or gauges.

Built for performance, flexibility, and ease of use, this 25 ft. line set is ideal for MRCOOL 5th Gen single-zone systems with 9K - 12K heads or multi-zone systems where one of the zones includes a 6,000 BTU air handler.

🔧 Key Features

• Length: 25 feet – standard length for most mini split installs

• Line Sizes: 1/4" liquid line x 3/8" suction line – tailored for 6K - 9K - 12K indoor units

• Pre-Charged with R-454B – Environmentally friendly refrigerant sealed at the factory

• Quick Connect Fittings – Designed for easy, leak-free DIY installation

• Durable & Flexible – White UV-resistant sleeve with insulated copper tubing

• System Compatibility:

  • MRCOOL DIY® 5th Gen 6K single-zone systems

  • MRCOOL Multi-Zone DIY Systems: Multi3-18K, Multi4-27K, Multi5-36K, Multi6-48K, Multi6-55K 
    (Ensure line set size matches indoor air handler BTU rating in multi-zone installs)

✅ Installation Notes

• This is the standard line set length included with most 9K single-zone systems.

• Need more length? Use couplers and extended control wire (Pro Cable sold separately).

• Follow MRCOOL installation instructions for torque values and setup guidance to preserve your warranty.

Shop with confidence at MRCOOL DIY Direct — the most trusted source for MRCOOL HVAC systems, genuine accessories, and expert support. This 25 ft. line set is your go-to solution for reliable, straightforward DIY installation.