MRCOOL DIYCOUPLER-38 + DIYCOUPLER-58 with 75 Ft. Communication Wire

The MRCOOL DIYCOUPLER-38 + DIYCOUPLER-58 with 75 Ft. Communication Wire is the perfect solution for extending your MRCOOL 24K or 36K DIY and VersaPro mini split system installations. When your pre-charged line set isn’t long enough for the required distance between the indoor and outdoor units, this coupler kit bridges the gap—maintaining system performance, refrigerant integrity, and ease of installation.

This kit includes both 3/8” and 5/8” couplers, and a generous 75 feet of communication wire to give you the flexibility needed for longer, more complex installs. Whether you're working in large homes, multi-room configurations, or detached structures, this kit ensures a seamless connection for efficient operation.

MRCOOL DIYCOUPLER-38 + DIYCOUPLER-58 with 75 Ft. Communication Wire Features

System Compatibility – Designed for MRCOOL DIY 24K & 36K systems and VersaPro mini splits up to 2.5 Ton. Ensures a reliable and compatible connection with your setup.

Dual Coupler Sizes – Includes both 3/8” and 5/8” couplers for a tight, leak-resistant seal and secure extension of the line set.

Extended Communication Range – Comes with 75 feet of communication wire, giving you the flexibility to span greater distances between indoor and outdoor units.

Refrigerant Integrity Maintained – Preserves the efficiency of prefilled line sets without requiring vacuuming or refrigerant charging.

Quick Connect Installation – Uses MRCOOL’s DIY Quick Connect® technology, allowing fast, easy, and secure coupler connections for a hassle-free install.

MRCOOL DIYCOUPLER-38 + DIYCOUPLER-58 with 75 Ft. Communication Wire Applications

• Extended Installations – Ideal when the standard MRCOOL line set is too short for the setup

• Large Structures – Perfect for bigger homes, barns, or detached garages needing extra distance

• Multi-Zone Use – Supports split or multi-room applications requiring longer line spans

• System Expansion – Makes it easy to extend the reach of DIY or VersaPro installations

• Flexible Layouts – Adapts to unique home designs, remodels, or retrofits with distance challenges

What’s Included?

• DIYCOUPLER-38 (3/8” Coupler)

• DIYCOUPLER-58 (5/8” Coupler)

• 75 Ft. of Communication Wire
  

Frequently-Asked Questions

Can I use this with any MRCOOL system?
This kit is specifically designed for MRCOOL DIY 24K & 36K systems and VersaPro units up to 2.5 Ton. It is not compatible with smaller units or non-DIY systems.

Does it come with refrigerant?
No refrigerant is needed. The couplers are designed to work with pre-charged line sets and maintain refrigerant seal integrity when connected properly.

Do I need a vacuum pump to install this?
No. This is a vacuum-free installation when used with compatible MRCOOL prefilled line sets. It’s intended to keep installation quick and simple.

Can I install this myself?
Yes, if you're comfortable with MRCOOL DIY systems. However, if you're unsure, it's always a good idea to have an HVAC professional assist, especially to ensure leak-proof connections and warranty protection.

Manual

• MRCOOL DIYCOUPLER-38 + DIYCOUPLER-58 with 75 Ft. Communication Wire Manual