MRCOOL DIY 5th Gen 35 Ft. Pre-Charged Quick Connect Line Set with DIY Pro Cable, 1/4" x 1/2", for DIY 18K Mini Split Indoor Air Handler

MRCOOL DIY 5th Gen 35 Ft. Pre-Charged Quick Connect Line Set with DIY Pro Cable, 1/4" x 1/2", for DIY 18K Mini Split Indoor Air Handler

The MRCOOL DIY® 5th Gen 35 ft Pre-Charged Quick Connect Line Set with DIY Pro Cable (1/4″ x 1/2″) is designed for easy and efficient installation of MRCOOL DIY mini-split systems. This line set comes pre-charged with R-454B refrigerant, eliminating the need for vacuuming or handling refrigerant during setup. With MRCOOL’s patented Quick Connect fittings, it allows secure, tool-free, and leak-resistant connections, making it ideal for both DIY users and professionals looking for a simplified installation process.

Built with a 1/4″ liquid line and 1/2″ suction line, this line set is specifically compatible with 9K, 12K, and 18K BTU MRCOOL DIY 5th Gen indoor air handlers, ensuring proper refrigerant flow and system performance. It also includes the DIY Pro communication and power cable, which ensures reliable connectivity between the indoor and outdoor units for smooth operation and control.

At 35 ft in length, this line set offers extended reach for installations that require more distance between the air handler and the outdoor condenser. Its durable, weather-resistant construction helps protect the refrigerant lines and cable from environmental exposure, ensuring long-lasting performance and dependable operation.

Whether for a new setup or an upgrade, this pre-charged line set with DIY Pro Cable provides a user-friendly, reliable solution that supports efficient and hassle-free installation for MRCOOL DIY systems.

Features

• Pre-Charged with R-454B – Line set is factory-filled and sealed with environmentally friendly R-454B refrigerant for simplified installation.
• Quick Connect Fittings – Uses tool-free, leak-proof connections that eliminate the need for HVAC tools or professional vacuuming.
• 35 Ft. Line Set Length – Perfect for medium-distance installations, including second-floor units, garages, or expanded home layouts.
• Sized for 18K BTU Systems – Specifically built to pair with MRCOOL DIY 5th Gen 18K air handlers, ensuring ideal refrigerant flow and system compatibility.
• Includes DIY Pro Cable – Comes with a weather-resistant communication and power cable, pre-matched to MRCOOL system standards.
• Durable Outer Jacket – Features UV-resistant and weatherproof insulation to protect against environmental wear and damage.

Specifications

Applications

• Multi-level homes – Great for connecting units across floors or in elevated positions

• Detached buildings – Ideal for garages, workshops, or studios separate from the main structure

• Wider room layouts – Useful in larger rooms or setups requiring extended reach

• Retrofit installs – Replaces existing line sets in older systems with a pre-charged, quick-fit solution

• DIY-friendly setups – Made for MRCOOL customers seeking a tool-free installation experience

What’s Included

• 35 Ft. Line Set (1/4" x 1/2")

• DIY Pro Communication and Power Cable

• Quick Connect fittings (pre-installed)
  

• Setup and safety instructions

Frequently-Asked Questions

Is this line set compatible with 12K or 9K air handlers?
No. This specific line set is optimized for MRCOOL 18K 5th Gen systems only due to the 1/2" suction line size required for proper performance.

Does it come with refrigerant already inside?
Yes. The line set is pre-charged with R-454B refrigerant, sealed from the factory for immediate use.

Can I cut this line set to a shorter length?
No. The line set is designed to be used at its full 35-foot length. Cutting or modifying it will void the sealed system and compromise performance.

Is this safe for first-time DIY users?
Yes. MRCOOL Quick Connect systems are designed for user-friendly installation, though reviewing the manual or working with an HVAC professional if unsure is always a good idea.