Green Vista Living insulated copper lineset with brass connectors for HVAC systems
Lineset insulated copper tubing for mini split AC, with brass flare fittings, close-up view
MRCOOL quick connect brass line set fittings with copper pipes for HVAC
Green Vista Living insulated copper lineset with brass connectors for HVAC systems
Lineset insulated copper tubing for mini split AC, with brass flare fittings, close-up view
MRCOOL quick connect brass line set fittings with copper pipes for HVAC

MRCOOL 5th Gen 16ft 1/4 x 3/8 Pre-Charged Lineset for DIY 6K, 9K, & 12K Indoor

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$227.00
$523.22
$227.00
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Green Vista Living insulated copper lineset with brass connectors for HVAC systems

GeoCool

MRCOOL 5th Gen 16ft 1/4 x 3/8 Pre-Charged Lineset for DIY 6K, 9K, & 12K Indoor

$523.22 $227.00
Green Vista Living insulated copper lineset with brass connectors for HVAC systems
Lineset insulated copper tubing for mini split AC, with brass flare fittings, close-up view
MRCOOL quick connect brass line set fittings with copper pipes for HVAC

GeoCool

MRCOOL 5th Gen 16ft 1/4 x 3/8 Pre-Charged Lineset for DIY 6K, 9K, & 12K Indoor

$523.22 $227.00
  • Description

MRCOOL 5th Gen 16ft 1/4 x 3/8 Pre-Charged Line Set for DIY 6K, 9K, & 12K Indoor

The MRCOOL 5th Gen 16ft 1/4 x 3/8 Pre-Charged Line Set is designed to make installation of MRCOOL DIY 6K, 9K, and 12K indoor units fast and hassle-free. Pre-charged with R-454B refrigerant, this Quick-Connection line set eliminates the need for vacuum pumps, gauges, or brazing equipment, making it simple for homeowners to connect their system. Built with durable copper and secure fittings, it ensures reliable refrigerant transfer and long-lasting performance.

Please note: This line set is designed for DIY installation and comes pre-charged with R-454B refrigerant for quick, tool-free setup.

MRCOOL 5th Gen 16ft 1/4 x 3/8 Pre-Charged Line Set for DIY 6K, 9K, & 12K Indoor Features

Pre-Charged with R-454B
Factory-charged with eco-friendly R-454B refrigerant, offering efficient performance with lower environmental impact.

Quick-Connection Fittings
Designed for a secure, leak-free connection that eliminates the need for vacuuming or specialized tools.

Durable Copper Tubing
Crafted from high-quality copper for reliable refrigerant flow and long-term durability.

Optimized Size
Features a 1/4" liquid line and 3/8" suction line, tailored for DIY 6K, 9K, and 12K indoor units.

Safety Compliant
Contains compressed gas and meets Proposition 65 safety requirements.

MRCOOL 5th Gen 16ft 1/4 x 3/8 Pre-Charged Line Set for DIY 6K, 9K, & 12K Indoor Applications

  • DIY installations – specifically designed for MRCOOL DIY 6K, 9K, and 12K indoor units.

  • System extensions – provides a pre-charged option for expanding coverage.

  • Upgrades – replace worn or damaged line sets with a fresh, ready-to-use solution.

  • Fast setup – Quick-Connection fittings reduce installation time and complexity.

What’s Included?

  • 16 ft 1/4 x 3/8 Pre-Charged Line Set (R-454B)

  • User Manual

Warranty

  • 1-Year Parts Warranty

MRCOOL 5th Gen 16ft 1/4 x 3/8 Pre-Charged Line Set for DIY 6K, 9K, & 12K Indoor 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 3/8"
Contains Chemicals Yes
Contains Aerosol Yes
Contains Compressed Gas Yes
Proposition 65 Warning Yes
Restricted States GU, PR, VI

Frequently-Asked Questions

Is this line set DIY-friendly?
Yes. It is designed for DIY installation with MRCOOL DIY 6K, 9K, and 12K indoor units.

What refrigerant does it use?
This line set comes pre-charged with R-454B refrigerant, a more eco-friendly option than older R-410A refrigerant.

Do I need special tools for installation?
No. The Quick-Connection fittings allow for simple installation without vacuum pumps, gauges, or brazing.

Can I use this line set with other systems?
No. This line set is specifically engineered for MRCOOL DIY 6K, 9K, and 12K indoor units only.

Frequently Asked Questions

Yes! We provide free and fast shipping on MOST orders within the continental United States. However, some specific brands and items will require a quote. You can live chat or call us for a quote
Most orders ship out within 1–2 business days and arrive within 3–5 business days depending on your location.
We offer easy returns as long as your item meets the conditions outlined in our Return Policy. Items must be unused, in original packaging, and returned within the specified return window.
Absolutely! Our in-house product experts are here to help. Live chat or call us 513-743-829 for personalized advice before or after your purchase.
Yes. All products include any applicable manufacturer warranties, and we’ll help you handle any warranty claims if needed.
Yes, we only sell 100% authentic, brand-new products, sourced directly from our manufacturers or authorized distributors.

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Feedback From Our Customers

At Green Vista Living, we pride ourselves on delivering top-quality products and exceptional service to solar professionals and homeowners alike. Here's what our customers have to say about their experiences with us.

Kevin Leary
May 18, 2025
★★★★★

Incredible Tech Support from Anees of Green Vista Living. Exceptional service and went above and beyond on every question.

Bryan Cunningham
Off grid Kit • Dec 21, 2025
★★★★★

Shipment was slow due to high demand, but the team kept me informed and ensured everything arrived properly.

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