MRCOOL 5th Gen 25ft 1/4 x 1/2 Lineset for DIY 18K Indoor - R454B, DIY25-1412-O

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MRCOOL 5th Gen 25ft 1/4 x 1/2 Lineset for DIY 18K Indoor - R454B, DIY25-1412-O

Name: MRCOOL 5th Gen 25ft 1/4 x 1/2 Lineset for DIY 18K Indoor - R454B, DIY25-1412-O
Brand: MRCOOL
SKU: DIY25-1412-O
Price: 272.00 USD
Availability: InStock

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SKU: DIY25-1412-O

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25 ft pre-charged lineset for 5th Gen DIY 18K systems
1/4" liquid line, 1/2" suction line
Snap-together Quick Connect fittings — no brazing, flaring, or vacuum pump needed
Pre-charged with eco-friendly R-454B refrigerant
UV-resistant insulation for outdoor durability

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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 • 100% DIY Installation • 25-Foot Reach

MRCOOL 5th Gen DIY 25ft 1/4" x 1/2" Lineset for DIY 18K Indoor Units DIY25-1412-O

Establish a high-performance connection for your 18,000 BTU system with the MRCOOL 5th Gen 25ft Pre-Charged Lineset (DIY25-1412-O). Precision-engineered for 5th Generation DIY mini-split air handlers, this 25-foot lineset offers the ideal length for standard residential configurations where the condenser is situated at a moderate distance from the indoor unit. Factory-sealed and pre-charged with the next-generation R454B refrigerant, this unit completely removes the need for professional vacuum pumps or refrigerant charging, ensuring a streamlined, cost-effective installation process that maintains industrial-grade reliability.

MRCOOL 5th Gen DIY 25ft 1/4" x 1/2" Lineset Applications

Standard residential runs connecting an 18,000 BTU indoor air handler to an outdoor condenser.
Installations requiring a 25-foot span through wall cavities or across exterior siding.
System designs requiring a tool-free connection for 5th Generation DIY hardware.
Compliance-driven upgrades utilizing the latest R454B low-GWP refrigerant standards.

Engineered to provide the exact 1/4" liquid and 1/2" suction diameters required for optimal refrigerant flow and pressure management in 18K BTU systems.

MRCOOL 5th Gen DIY 25ft 1/4" x 1/2" Lineset Specifications

SKU	DIY25-1412-O
Length	25 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
Connection Type	Patented Quick Connect Fittings

Why Choose the MRCOOL 5th Gen 25ft DIY Lineset

True DIY Simplicity: Patented Quick Connect fittings allow for a leak-proof, airtight seal without specialized HVAC tools or flaring kits.
Eco-Friendly Technology: Arrives pre-charged with R454B, ensuring your setup meets the newest environmental and efficiency regulations.
Robust Construction: High-density weather-resistant insulation prevents condensation and minimizes energy loss across the 25-foot span.
Professional Results: Enables homeowners to execute a professional-grade installation while bypassing expensive contractor fees for vacuuming and charging.

The MRCOOL 5th Gen 25ft DIY Lineset (DIY25-1412-O) provides the precise fit and engineering needed to ensure your 18K BTU system operates at peak efficiency from day one.

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

They are sold in set lengths. The DIY25-1412-O is 25 ft, a common length for standard runs through wall cavities or along exterior siding.

Patented Quick Connect fittings create a leak-proof, airtight seal without specialized HVAC tools or flaring kits, and the lines come pre-charged so no vacuuming or charging is needed.

It connects 5th Gen DIY 18K BTU indoor air handlers to the outdoor condenser, using the 1/4" liquid and 1/2" suction sizes those units require.

It arrives pre-charged with R-454B, a low-GWP refrigerant that meets newer environmental standards.

Yes. High-density, weather-resistant insulation helps prevent condensation and energy loss along the full 25-foot run.

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MRCOOL 5th Gen 25ft 1/4 x 1/2 Lineset for DIY 18K Indoor - R454B, DIY25-1412-O

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