MRCOOL 5th Gen 50ft 3/8 x 5/8 Lineset for DIY 24K & 36K Indoor w/ DIY Pro Cable - R454B, DIY50-3858C-O

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MRCOOL 5th Gen DIY 50ft 3/8 x 5/8 Lineset for DIY 24K & 36K Indoor w/ DIY Pro Cable - R454B, DIY50-3858C-O

Name: MRCOOL 5th Gen DIY 50ft 3/8 x 5/8 Lineset for DIY 24K & 36K Indoor w/ DIY Pro Cable - R454B, DIY50-3858C-O
Brand: MRCOOL
SKU: DIY50-3858C-O
Price: 662.00 USD
Availability: InStock

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SKU: DIY50-3858C-O

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50 ft pre-charged lineset for 5th Gen DIY 24K and 36K systems, includes DIYPro cable
3/8" liquid line, 5/8" suction line
Snap-together Quick Connect fittings — no brazing, flaring, or vacuum pump needed
DIYPro cable skips running electrical conduit over long distances
Good for detached garages, guesthouses, or long attic/basement runs

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Pre-Charged R454B • DIYPRO™ Cable Included • 50-Foot Reach

MRCOOL 5th Gen 50ft 3/8" x 5/8" Lineset for DIY 24K & 36K Indoor Units

Extend the reach of your home climate control system with the MRCOOL 5th Gen 50ft Pre-Charged Lineset (DIY50-3858C-O), specifically engineered for 24,000 and 36,000 BTU DIY Indoor Air Handlers. Designed to seamlessly connect your indoor and outdoor units without the need for specialized tools, professional HVAC technicians, or a vacuum pump, this 50-foot extension is the ultimate solution for custom installations requiring a longer distance. This premium 3/8-inch liquid and 5/8-inch suction lineset comes factory-charged with the next-generation R454B refrigerant. As an environmentally conscious, low-GWP refrigerant, R454B ensures your system operates at peak efficiency while meeting the latest environmental regulations. The patented Quick Connect fittings guarantee a secure, leak-proof seal with a simple twist of a wrench.

MRCOOL 5th Gen 50ft 3/8" x 5/8" Lineset Specifications

SKU	DIY50-3858C-O
Length	50 Feet
Liquid Line Size	3/8 Inch
Suction Line Size	5/8 Inch
Compatibility	5th Gen DIY 24K & 36K BTU Indoor Handlers
Refrigerant Type	Pre-Charged with R454B
Included Cable	DIYPRO™ Communication Cable

Unmatched Protection and Simplicity

A standout feature of this 5th generation package is the inclusion of the innovative DIYPRO™ Cable. This heavily shielded communication wire eliminates the expensive and tedious requirement of running traditional electrical conduit. It provides superior mechanical protection against harsh weather, UV exposure, and yard pests, ensuring your system maintains flawless communication between the condenser and the air handler.

Whether you are installing a unit in a detached garage or across a sprawling residential footprint, save thousands on installation costs and future-proof your home with the heavily insulated MRCOOL 5th Gen 50ft DIY Lineset and DIYPRO Cable combo.

Key Information

Order Cutoff Time: 2:00 PM EST
Order Handling Time: 1–3 business days (Monday–Friday)
Transit Time: 1–7 business days (Monday–Friday)
Total Estimated Delivery Time: 3–11 business days (Monday–Friday)
Shipping Availability: Free Shipping On some Items In The Contiguous United States only

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Frequently Asked Questions

This MRCOOL 5th Gen lineset (DIY50-3858C-O) is the 50-foot length, intended for custom installs where the indoor and outdoor units are farther apart, such as a detached garage.

It is made for 5th Gen DIY 24K and 36K BTU indoor air handlers, using a 3/8" liquid line and 5/8" suction line.

No. It comes factory-charged with R454B refrigerant, and the patented Quick Connect fittings seal with a simple wrench, so no vacuum pump or HVAC technician is needed.

It is a heavily shielded communication wire between the condenser and air handler that resists weather, UV exposure, and pests and removes the need for traditional electrical conduit.

It is pre-charged with R454B, a lower-GWP refrigerant that meets the latest environmental regulations.

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MRCOOL 5th Gen DIY 50ft 3/8 x 5/8 Lineset for DIY 24K & 36K Indoor w/ DIY Pro Cable - R454B, DIY50-3858C-O

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