MRCOOL DIY 5th Gen 35 Ft. Pre-Charged Quick Connect Line Set with DIY Pro Cable

MRCOOL DIY 5th Gen 35 Ft. Pre-Charged Quick Connect Line Set with DIY Pro Cable

The MRCOOL DIY® 5th Gen 35 ft Pre‑Charged Quick Connect Line Set (1/4″ x 3/8″) is a ready‑to‑install refrigerant line set designed to make mini‑split HVAC installations straightforward and efficient. This line set arrives factory pre‑charged with R‑454B refrigerant, eliminating the need for vacuum pumps or on‑site refrigerant charging. Its Quick Connect® fittings allow for secure, leak‑resistant connections without specialized HVAC tools, making it especially suitable for DIY installers and professionals alike.

Sized at 35 ft, this line set offers extended reach for installations where the indoor and outdoor units are placed at moderate distances apart. It features a 1/4″ liquid line and a 3/8″ suction line, engineered specifically for compatibility with MRCOOL 5th Gen 6K, 9K, and 12K BTU indoor mini‑split air handlers. This ensures proper refrigerant flow and system performance tailored to these unit capacities.

The construction includes durable tubing with weather‑resistant insulation and robust fittings that help protect the refrigerant lines from outdoor exposure and UV elements. This enhances long‑term reliability and helps maintain efficient system operation throughout varying seasonal conditions.

Ideal for homeowners installing, upgrading, or replacing a MRCOOL mini‑split system, this 35 ft pre‑charged line set provides flexibility, convenience, and peace of mind. With its combination of length, easy Quick Connect installation, and pre‑charged design, it delivers a practical solution for reliable, extended‑reach mini‑split HVAC setups.

Features

• Pre-Charged Convenience – Factory pre-charged with R-454B refrigerant, removing the need for charging or vacuuming during installation.
• Quick Connect Fittings – Allows for a tool-free, leak-resistant connection that simplifies the install process for non-professionals.
• Sized for Smaller Units – Designed specifically for 6K, 9K, and 12K 5th Gen DIY air handlers for optimal compatibility and system performance.
• 35 Ft. Extended Length – Offers more placement flexibility between indoor and outdoor components without needing refrigerant line splicing.
• DIY Pro Cable Included – Includes a weather-resistant communication and power cable designed to work seamlessly with MRCOOL mini split systems.
• Durable Construction – Features a tough outer jacket that’s UV- and weather-resistant, protecting your line set year-round.

Specifications

Applications

• Compact installs – Perfect for homes or spaces where a 35-ft. run is needed between air handler and condenser

• Room-to-room use – Ideal for indoor units placed in different rooms or across split walls

• Second-story setups – Excellent for vertically-stacked configurations in two-story homes

• Detached structures – Useful for extending line sets to small garages, studios, or sheds

• DIY replacement – A smart choice for replacing older or damaged line sets in existing MRCOOL systems

What’s Included

• 35 Ft. Line Set (1/4" x 3/8")

• DIY Pro Cable (communication and power)

• Quick Connect Fittings (pre-installed)

Frequently-Asked Questions

Is this line set compatible with all MRCOOL units?
No. It is specifically designed for use with 5th Gen MRCOOL DIY 6K, 9K, and 12K indoor air handlers. It is not compatible with 18K or larger units.

Does it require professional installation?
No. This line set is meant for DIY installations using MRCOOL’s patented Quick Connect fittings. However, those unfamiliar with HVAC systems may still benefit from hiring a technician.

Is it already filled with refrigerant?
Yes. The line set is pre-charged with R-454B and factory-sealed for clean, efficient setup without handling refrigerant.

Can I cut the line to a shorter length?
No. This line set must be used at full length as altering it will void the warranty and compromise the sealed, pre-charged design.