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

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

The MRCOOL DIY® 5th Gen 16 ft Pre-Charged Quick Connect Line Set (3/8″ x 5/8″) is a ready-to-install refrigerant connection solution designed for use with MRCOOL 24K and 36K BTU indoor mini-split units. This compact 16-foot line set comes factory pre-charged with R-454B refrigerant, eliminating the need for vacuuming or refrigerant charging during installation. Its Quick Connect® fittings allow for secure, leak-resistant connections without requiring specialized HVAC tools, making setup easier for both DIY installers and professionals.

Sized with a 3/8″ liquid line and a 5/8″ suction line, this line set matches the refrigerant flow needs of compatible 24K and 36K indoor units to help ensure efficient system performance. The 16-foot length is ideal for installations where the indoor and outdoor components are placed close together, such as standard exterior wall applications or compact mechanical layouts.

Built with durable materials and weather-resistant insulation, this line set is designed to withstand outdoor exposure and help maintain reliable performance year-round. The robust construction and well-engineered fittings allow for consistent refrigerant flow and secure connections even in challenging installation environments.

Whether you’re installing a new MRCOOL DIY mini-split system or upgrading an existing one, the MRCOOL DIY® 5th Gen 16 ft Pre-Charged Quick Connect Line Set offers a convenient, user-friendly solution that combines simplicity, compatibility, and dependable performance for short-distance HVAC line runs.

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

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.

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

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.