MRCOOL DIY 5th Gen 35 Ft. Pre-Charged Quick Connect Line Set with DIY Pro Cable, 3/8" x 5/8", for DIY 24K & 36K Indoor Mini Split Air Handler

MRCOOL DIY 5th Gen 35 Ft. Pre-Charged Quick Connect Line Set with DIY Pro Cable, 3/8" x 5/8", for DIY 24K & 36K Indoor Mini Split Air Handler

The MRCOOL DIY® 5th Gen 35 ft Pre-Charged Quick Connect Line Set with DIY Pro Cable (3/8″ x 5/8″) is designed for installations that require extended distance between the indoor air handler and outdoor condenser. Compatible with MRCOOL 24K and 36K DIY 5th Gen indoor units, this line set arrives pre-charged with R-454B refrigerant, allowing a fully DIY-friendly setup without the need for vacuum pumps or refrigerant handling. Its Quick Connect fittings ensure fast, secure, and tool-free installation.

This package includes a 35-ft DIY Pro communication and power cable, providing the necessary wiring to link the indoor and outdoor components. The 3/8″ liquid line and 5/8″ suction line are properly sized to support efficient system performance, ensuring reliable cooling and heating operation once installed.

Built with durable, weather-resistant materials, the line set is made to withstand outdoor exposure while protecting the internal refrigerant lines. The 35-ft length offers excellent flexibility for longer runs, making it ideal for multi-level homes, wider installation layouts, or setups where equipment must be placed farther apart.

Whether you are installing a new MRCOOL DIY system or replacing an existing line set, this pre-charged line set with DIY Pro Cable provides a dependable, user-friendly solution that supports efficient and straightforward mini-split installation.

Features

• Pre-Charged with R-454B – Factory-sealed with R-454B refrigerant, allowing for a seamless, no-hassle installation.
• Quick Connect Fittings – Patented tool-free fittings ensure a leak-proof, fast connection with no need for refrigerant handling.
• Built for Larger Units – Engineered specifically for MRCOOL DIY 24K and 36K indoor air handlers, with the correct line sizing for optimal performance.
• Extended 35 Ft. Length – Offers increased flexibility for installations across longer distances, second stories, or detached structures.
• DIY Pro Cable Included – Comes with a weather-resistant communication and power cable, streamlining the entire installation process.
• Protective Insulation Jacket – Durable exterior jacket resists UV exposure and weather damage, ensuring longevity and reliable performance.

Specifications

Applications

• Second-story installs – Ideal for vertically-separated indoor and outdoor units

• Garage or ADU applications – Great for detached spaces like shops or guest houses

• Wider wall spans – Useful when air handler and condenser must be placed far apart

• DIY replacements – Perfect for replacing or extending worn line sets in MRCOOL DIY systems

• Medium-range residential setups – Supports efficient mid-distance installations with larger-capacity units

What’s Included

• 35 Ft. Line Set (3/8" x 5/8")

• DIY Pro Communication and Power Cable

• Pre-installed Quick Connect fittings
  

Frequently-Asked Questions

Is this line set compatible with smaller MRCOOL units?
No. This model is only compatible with MRCOOL DIY 24K and 36K air handlers and will not fit smaller systems due to its line size.

Does this line set include refrigerant?
Yes. It comes factory pre-charged with R-454B refrigerant and is sealed for ready-to-connect installation.

Can I shorten the line if needed?
No. The line set must be used at its full 35-foot length. Modifying it will void the sealed charge and compromise system performance.

Do I need to hire a professional to install it?
No. This is a DIY-friendly line set designed to be installed without HVAC tools. However, if you are unfamiliar with MRCOOL systems, a licensed HVAC technician may still be helpful.