MRCOOL DIY 5th Gen 16 ft. 1/4" x 1/2" Pre-Charged Quick Connect Line Set for 9K, 12K & 18K Indoor Units
The MRCOOL DIY® 5th Gen 25 ft Pre-Charged Quick Connect Line Set (1/4″ x 3/8″) is a factory-charged refrigerant line set designed to simplify the installation of compatible mini-split systems. Pre-charged with R-454B refrigerant, it removes the need for vacuuming or additional charging, making setup quicker and more convenient. Its Quick Connect® fittings allow secure, tool-free connections, making it user-friendly for both DIY installers and professionals.
This line set features a 1/4″ liquid line and a 3/8″ suction line, specifically built for MRCOOL 5th Gen 9K and 12K indoor units. The 25-foot length offers flexible routing options, making it suitable for installations where indoor and outdoor units are moderately spaced.
Constructed with durable materials and precision-engineered fittings, the line set ensures consistent refrigerant flow and long-term system performance. Its simplified installation process reduces setup time and potential errors, providing a reliable and efficient solution for new installations or replacements.
Whether upgrading or installing a MRCOOL DIY mini-split system, this pre-charged line set delivers dependable performance and a hassle-free installation experience.
Please note: This line set is designed for DIY installation and comes pre-charged with R-454B refrigerant for tool-free setup.
Features
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Pre-Charged with R-454B Refrigerant
Eco-friendly R-454B ensures efficient operation while reducing environmental impact.
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Quick-Connection Design
Secure fittings eliminate the need for brazing, gauges, or vacuuming, making installation easier.
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Durable Copper Tubing
Crafted from high-quality copper for long-lasting strength and dependable refrigerant transfer.
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Sized for Compatibility
Features a 1/4" liquid line and 1/2" suction line, optimized for MRCOOL DIY 9K, 12K, and 18K indoor units.
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Safety Certified
Contains compressed gas and meets Proposition 65 safety standards for compliance and reliability.
Specifications
| Specification |
Details |
| Equipment Type |
R-454B Charged Line Set |
| Length |
16 Feet |
| Color |
Copper |
| Line Set Fitting Type |
Quick-Connection |
| Liquid Line Size |
1/4" |
| Suction Line Size |
1/2" |
| Contains Chemicals |
Yes |
| Contains Aerosol |
Yes |
| Contains Compressed Gas |
Yes |
| Proposition 65 Warning |
Yes |
| Restricted States |
GU, PR, VI |
Applications
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DIY installations – made for MRCOOL DIY 9K, 12K, and 18K indoor units.
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System expansions – extend system capacity with a ready-to-use pre-charged line set.
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Replacement solution – upgrade older or damaged line sets with a reliable new option.
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Time-saving installs – Quick-Connection design makes installation faster and easier.
What’s Included
Warranty
Frequently-Asked Questions
Is this line set DIY-friendly?
Yes. It is specifically designed for DIY installation with MRCOOL DIY 9K, 12K, and 18K indoor units.
What refrigerant is included?
This line set comes pre-charged with R-454B refrigerant, which is more environmentally friendly than R-410A.
Do I need special tools to install it?
No. The Quick-Connection fittings make installation simple without vacuum pumps, gauges, or brazing.
Can this line set be used with other systems?
No. It is built exclusively for MRCOOL DIY 9K, 12K, and 18K indoor units and should not be used with other models or brands.
