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MRCOOL DIY® 5th Gen 25 ft. 1/4" x 1/2" Pre-Charged Quick Connect Line Set (for 18K Indoor Units)

Name: MRCOOL DIY® 5th Gen 25 ft. 1/4" x 1/2" Pre-Charged Quick Connect Line Set (for 18K Indoor Units)
Brand: MRCOOL DIY Direct
SKU: DIY25-1412-O
Price: 287.00 USD
Availability: InStock

Vendor: MRCOOL DIY Direct Type: Mini Split Pre-Charged LIne Set

4.5' (1201 Reviews)

20% Off

$287.00 ~~$358.75~~

This Product Is In-Stock! Ready to ship

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MRCOOL DIY® 5th Gen 25 ft. 1/4" x 1/2" Pre-Charged Quick Connect Line Set (for 18K Indoor Units)

The MRCOOL DIY® 5th Generation 25 ft. Pre-Charged Line Set is purpose-built for use with 18,000 BTU indoor air handlers. With 1/4" liquid and 1/2" suction lines, this line set is factory pre-charged with R-454B refrigerant and features MRCOOL’s patented Quick Connect fittings, making installation simple, fast, and completely DIY-friendly — no vacuum pumps, gauges, or professional tools required.

This 25 ft. line set is the standard length included with most MRCOOL DIY mini split systems and is perfect for connecting your air handler to the condenser in typical residential setups. Compatible with both single-zone and multi-zone 5th Gen MRCOOL systems.

🔧 Key Features

Length: 25 feet – perfect for standard HVAC installations
Line Sizes: 1/4" liquid x 1/2" suction – compatible with 18K indoor air handler units
Pre-Charged with R-454B – Environmentally friendly refrigerant sealed and ready for use
Quick Connect Fittings – Patented tool-free connection system ideal for DIY installation
Durable Construction – UV-resistant white sleeve with insulated copper tubing
System Compatibility:
- MRCOOL DIY® 5th Gen 18K single-zone systems
- MRCOOL Multi-Zone DIY Systems: Multi2-18K, Multi3-27K, Multi4-36K, Multi5-48K
  (Line set must match indoor air handler BTU rating in multi-zone systems.)

✅ Installation Tips

Standard 25 ft. length works for most installs; if you need longer runs, use line set couplers and the appropriate length Pro Cable
Be sure to follow MRCOOL’s installation instructions, torque specs, and best practices for leak-free operation
Maintain system performance and warranty coverage by using only approved components

Order from MRCOOL DIY Direct – the most trusted nationwide retailer for genuine MRCOOL systems, parts, and accessories. Whether you're replacing a damaged line set or installing a new DIY mini split system, this 25 ft. pre-charged line set ensures a clean, efficient, and hassle-free setup.

Product Specifications

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Service & Support

Manufacturer Warranty

This product is covered by the manufacturer’s warranty against defects in materials and workmanship when installed and used according to the manufacturer’s guidelines. Warranty terms and coverage periods vary by manufacturer and product type. Please refer to the official product documentation or contact our team if you need help verifying warranty details.

Technical Support

Freedom HVAC Supply is staffed by people who actually understand HVAC systems. If you need help confirming compatibility, selecting the correct replacement part, or understanding installation requirements, our team is available to assist before and after your purchase.

Product Documentation

Installation manuals, specification sheets, wiring diagrams, and other technical documentation are available whenever possible. These resources help ensure proper installation, system compatibility, and safe operation of your equipment.

Parts Compatibility & Cross-Reference

Many HVAC parts replace or supersede older manufacturer part numbers. We provide replacement part numbers and compatible model information on product pages to help technicians and homeowners verify the correct component before ordering.

Replacement Parts & Accessories

Freedom HVAC Supply carries genuine replacement components and compatible accessories to keep HVAC systems running reliably. From control boards and motors to sensors, line sets, and installation accessories, we supply the parts professionals depend on.

Customer Support

If you have questions about product compatibility, warranty coverage, or installation considerations, our support team is ready to help. Our goal is to make sure you get the right part the first time so your system can get back up and running quickly.

FAQs About Our HVAC Products

Quick answers to questions about ordering, compatibility, and installation.

Ordering & Compatibility

1. Do you sell HVAC equipment to homeowners and DIY installers?

Yes. Freedom HVAC Supply sells HVAC equipment and parts to contractors, property owners, and qualified DIY installers. Some products may require professional installation based on local codes.

2. How do I know if this HVAC product is compatible with my system?

Product pages include specifications and compatibility details. If you’re unsure, our team can help verify fit before you order.

3. Can HVAC contractors purchase from Freedom HVAC Supply?

Absolutely. We work with licensed HVAC contractors, installers, and professionals nationwide.

Installation & Support

1. Do HVAC systems require professional installation?

Some HVAC equipment must be installed by a licensed professional to meet code requirements or warranty terms. Always review manufacturer guidelines.

2. Can you help me choose the right HVAC system or part?

Yes. Our support team can assist with product selection based on your application, space, and installation needs.

3. Do you provide installation manuals or documentation?

Manufacturer installation guides and documentation are included or available upon request for most products.

Warranty & Shipping

1. Do HVAC products include a manufacturer warranty?

Most HVAC equipment includes a manufacturer warranty when installed according to guidelines. Warranty terms vary by brand and product.

2. Do you ship HVAC equipment nationwide?

Yes. We ship HVAC systems and parts throughout the continental United States using trusted freight and parcel carriers.

3. What should I know about freight delivery for HVAC equipment?

Larger HVAC equipment ships via freight and should be inspected upon delivery. Delivery details are provided during checkout.

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MRCOOL DIY® 5th Gen 25 ft. 1/4" x 1/2" Pre-Charged Quick Connect Line Set (for 18K Indoor Units)