MRCOOL DIY 5th Gen 50 Ft. Pre-Charged Quick Connect Line Set

The MRCOOL DIY 5th Gen 50 Ft. Pre-Charged Quick Connect Line Set with DIY Pro Cable is the ultimate solution for longer-distance MRCOOL mini split installations. Designed for use with 24K and 36K 5th Gen DIY air handlers, this line set comes factory pre-charged with R-454B refrigerant and equipped with patented Quick Connect fittings. It also includes a rugged DIY Pro Cable for seamless power and communication between units. Whether you're installing across a large home, detached garage, or second-story layout, this 50-foot line set delivers performance, convenience, and reliability without the need for vacuuming or professional tools.

MRCOOL DIY 5th Gen 50 Ft. Pre-Charged Quick Connect Line Set Features

Pre-Charged with R-454B – Factory-sealed and prefilled with R-454B refrigerant for a fast, clean, and safe connection process.

Quick Connect Fittings – Equipped with MRCOOL’s proprietary tool-free fittings that enable a secure, leak-proof seal without vacuuming.

50 Ft. Line Length – Provides extended reach for installations with greater distances between indoor and outdoor units.

Heavy-Duty DIY Pro Cable – Includes a durable, weather-resistant communication and power cable, pre-sized and matched to system requirements.

Sized for High-Capacity Units – Designed for MRCOOL 24K & 36K 5th Gen air handlers, with 3/8" liquid and 5/8" suction line compatibility.

UV & Weather Resistant Jacket – Features a rugged outer layer to protect against sunlight, moisture, and abrasion in outdoor environments.

MRCOOL DIY 5th Gen 50 Ft. Pre-Charged Quick Connect Line Set Applications

• Extended installations – Ideal for setups requiring long-distance connections between indoor and outdoor units

• Second-story or basement units – Works well in homes with vertical separation between air handler and condenser

• Detached structures – Excellent for garages, workshops, or outbuildings requiring extended reach

• Large room coverage – Supports installations in open-plan areas or wide structural layouts

• DIY retrofits or replacements – A reliable solution for upgrading existing MRCOOL line sets

What’s Included?

• 50 Ft. Line Set (3/8" x 5/8")

• DIY Pro Communication & Power Cable

• Pre-installed Quick Connect fittings
  

MRCOOL DIY 5th Gen 50 Ft. Pre-Charged Quick Connect Line Set Specifications

Frequently-Asked Questions

Is this line set compatible with smaller MRCOOL systems?
No. This specific model is designed only for 24K and 36K MRCOOL 5th Gen indoor air handlers. It will not work with smaller units like 12K or 9K.

Does it come prefilled with refrigerant?
Yes. It is factory pre-charged with R-454B, sealed and ready to connect—no additional refrigerant or vacuuming required.

Can I use this line set if I only need 30 or 40 feet?
No. The full 50-foot length must be used to preserve the sealed refrigerant system. It should not be cut or altered.

Is it hard to install for a first-time DIYer?
This product is designed for DIY-friendly installation, especially when paired with a MRCOOL DIY condenser and air handler. However, if you're unsure, a certified HVAC installer can ensure everything is connected properly.