
MRCOOL DIY® 5th Gen 50 ft. 1/4" x 1/2" Pre-Charged Quick Connect Line Set with DIY Pro Cable (for 9K, 12K & 18K Indoor Units)
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This product is estimated to arrive in August 2025. Pre-Order Now!
Free Shipping!
This product is estimated to arrive in August 2025. Pre-Order Now!
Upgrade your DIY mini-split system with the MRCOOL DIY® 5th Gen Pre-Charged Quick Connect Line Set. Designed specifically for compatibility with 9K, 12K, and 18K indoor units, this 50-foot line set features 1/4" liquid and 1/2" suction lines, pre-charged with eco-friendly R-454B refrigerant. With MRCOOL’s signature Quick Connect fittings, installation is fast, easy, and doesn’t require special tools or certifications.
Built for convenience and reliability, this line set ensures efficient refrigerant transfer while maintaining a clean, professional appearance with its white finish and bronze/copper metallic components. Ideal for homeowners and professionals seeking seamless performance and dependable design.
What size DIY Mini Split do I need?
Get ready to tailor your comfort with precision! Here's what you need to consider:
Still need help? Get in touch with our HVAC Experts!
Check out our blog 'Sizing Your Mini Split'
Can I mix and match Wall Mount and Ceiling Cassettes Air Handlers?
Yes, of course! Get in touch with one of our HVAC experts and we can put together a custom package for you.
What is the operational temperature range for DIY Mini Splits?
The operational temperature range for DIY air conditioning units varies based on whether it's a Multi-Zone or Single-Zone system:
Multi-Zone:
For the 4th Gen Multi-Zone 18k – 36k condensers:
For the 4th Gen Multi-Zone 48k condensers:
Indoors, at the thermostat:
Single-Zone:
For the 4th Gen Single Zone 12K – 24k condensers:
For the 4th Gen Single Zone 36k condensers:
Indoors, at the thermostat:
What can I do about the excess coil/line set length?
It is recommended to leave the remaining/excess line set coiled horizontally near the condenser and wrapped with protective tape. This will not impact performance whatsoever.
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