MRCOOL 5th Gen 50ft 1/4 x 1/2 Lineset for DIY 18K Indoor w/ DIY Pro Cable - R454B, DIY50-1412C-O

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MRCOOL 5th Gen 50ft 1/4 x 1/2 Lineset for DIY 18K Indoor w/ DIY Pro Cable - R454B, DIY50-1412C-O

Name: MRCOOL 5th Gen 50ft 1/4 x 1/2 Lineset for DIY 18K Indoor w/ DIY Pro Cable - R454B, DIY50-1412C-O
Brand: MRCOOL
SKU: DIY50-1412C-O
Price: 599.00 USD
Availability: InStock

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SKU: DIY50-1412C-O

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$599.00

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50 ft pre-charged lineset for 5th Gen DIY 18K systems, includes DIYPro cable
1/4" liquid line, 1/2" 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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*Please Note: This timeline is an estimate. Certain products may require an additional 1 week for manufacturing. Please speak with your sales rep, Matthew, for official details and confirmation before placing your order.

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

MRCOOL 5th Gen 50ft 1/4" x 1/2" Lineset for DIY 18K Indoor Units DIY50-1412C-O

The MRCOOL 5th Gen 50ft Pre-Charged Lineset (DIY50-1412C-O) provides the ultimate extended-reach connection for your 18,000 BTU DIY mini-split system. Engineered specifically for 5th Generation air handlers, this 50-foot span allows for maximum flexibility in unit placement, making it ideal for large-scale residential projects or installations where the condenser must be positioned far from the indoor unit. Factory-sealed and pre-charged with the next-generation, low-GWP R454B refrigerant, this system ensures peak performance while meeting the latest environmental standards. With patented Quick Connect fittings, you can achieve a professional, leak-proof installation without the need for specialized HVAC tools, vacuum pumps, or flaring kits.

MRCOOL 5th Gen 50ft 1/4" x 1/2" Lineset Applications

Long-distance residential installs requiring 50 feet of reach for 18,000 BTU systems.
Routing lines through extensive attic spaces, crawlspaces, or across large building footprints.
Positioning condensers in discrete locations away from main living areas to minimize noise.
Connecting 5th Gen DIY air handlers in detached home offices, garages, or multi-story additions.

Provides the exact 1/4" liquid and 1/2" suction diameters required for the refrigerant volume of 18K BTU configurations.

MRCOOL 5th Gen 50ft 1/4" x 1/2" Lineset Specifications

SKU	DIY50-1412C-O
Length	50 Feet
Liquid Line Size	1/4 Inch
Suction Line Size	1/2 Inch
Compatibility	5th Gen DIY 18K BTU Indoor Handlers
Refrigerant Type	Pre-Charged with R454B
Included Cable	DIYPRO™ Communication Cable

Advanced DIYPRO™ Technology & Protection

This 50-foot lineset package includes the revolutionary DIYPRO™ Cable. This heavily shielded communication wire is built to withstand the rigors of long-distance outdoor exposure, providing superior mechanical protection against UV rays, extreme weather, and yard pests. By utilizing the DIYPRO™ cable, you eliminate the legal and labor-intensive requirement of running traditional electrical conduit between units. This streamlines your 18K mini-split installation, reduces total material costs, and ensures your system maintains flawless communication across the full 50-foot span.

Why Choose the MRCOOL 5th Gen 50ft DIY Lineset

Zero Specialized Tools: Patented Quick Connect fittings create an airtight seal with simple hand tools.
Eco-Friendly R454B: Factory-charged with environmentally conscious, low-GWP refrigerant for modern compliance.
Extreme Reach: 50 feet of length accommodates complex installation layouts and unit separations.
Cost Efficiency: Bypasses expensive professional labor for vacuuming, charging, and electrical conduit work.

The MRCOOL 5th Gen 50ft DIY Lineset (DIY50-1412C-O) delivers the reliability and length needed for demanding 18K BTU installations, providing a professional-grade result with true do-it-yourself simplicity.

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

The DIY50-1412C-O uses patented Quick Connect fittings that seal airtight with simple hand tools, so no flaring, vacuuming, or charging is needed.

It isn't meant to be cut, since it arrives factory pre-charged with R-454B and sealed with Quick Connect fittings. Choose the length that fits your route.

The lineset runs from the indoor air handler to the outdoor condenser, often through a wall and then along the exterior, attic, or crawlspace. This 50 ft version gives room for long or complex routes.

It is made for 5th Gen DIY 18K BTU indoor air handlers, with a 1/4" liquid line and 1/2" suction line.

Yes. The package includes a heavily shielded DIYPRO communication cable built to withstand long outdoor runs, UV, extreme weather, and pests.

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MRCOOL 5th Gen 50ft 1/4 x 1/2 Lineset for DIY 18K Indoor w/ DIY Pro Cable - R454B, DIY50-1412C-O

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