MRCOOL® 25FT 1/4 x 3/8 Flared Line Set Kit for (9K- 12k), Olympus and Advantage Mini Split, MC25-1438
MRCOOL® 25FT 1/4 x 3/8 Flared Line Set Kit for (9K- 12k), Olympus and Advantage Mini Split, MC25-1438
Available in stock (248)
Product Description
The MRCOOL® MC25-1438 Mini Split Line Set Kit is a 25-foot flared copper refrigerant line set engineered specifically for 9,000 and 12,000 BTU ductless mini split systems. Proper line sizing is critical to system efficiency, compressor longevity, and reliable heating and cooling performance—and this line set delivers exactly that.
Constructed from high-quality refrigeration-grade copper, the MC25-1438 ensures excellent thermal transfer, corrosion resistance, and long-term durability. The factory-flared ends allow for secure, leak-resistant connections when paired with compatible MRCOOL and industry-standard mini split systems.
Featuring a 1/4" liquid line and a 3/8" suction line, this line set is perfectly matched for smaller-capacity indoor units, helping maintain correct refrigerant pressures and smooth system operation. The 25-foot length offers ideal flexibility for standard residential installations without unnecessary excess line that can reduce efficiency.
Whether you’re installing a new system, replacing an old line set, or upgrading an existing mini split, the MRCOOL MC25-1438 provides professional-grade reliability trusted by homeowners and HVAC installers alike.
KEY FEATURES & BENEFITS
- 25-Foot Line Length – Ideal for standard residential installs
- Designed for 9K & 12K Mini Splits – Correct sizing for peak efficiency
- 1/4" Liquid × 3/8" Suction Lines – Balanced refrigerant flow
- Refrigeration-Grade Copper – Durable and corrosion-resistant
- Factory-Flared Connections – Secure, leak-resistant fit
- OEM MRCOOL Accessory – Trusted compatibility and quality
- Flexible & Easy to Route – Simplifies installation
TECHNICAL SPECIFICATIONS
- Brand: MRCOOL
- Series: Mini Split Line Set
- Model: MC25-1438
- Unit Type: Accessory
- Equipment Type: Line Set
LINE SET DETAILS
- Line Set Length: 25 ft
- Maximum Line Set Length: 25 ft
- Liquid Line Size: 1/4"
- Liquid Line Fitting: 3/8"
- Suction Line Size: 3/8"
- Suction Line Fitting: 1/2"
- Fitting Type: Flared
MATERIAL & FINISH
- Material: Copper
- Color: Copper
- Color Family: Bronze / Copper Metallic
SAFETY & COMPLIANCE
- Proposition 65 Warning: Yes
- Contains Electronics: No
- Contains Chemicals: No
- Contains Aerosol: No
- Contains Compressed Gas: No
- Has Batteries: No
- Restricted States: GU, PR, VI
SHIPPING & LOGISTICS
- Freight Class: 100
Shipping Dimensions
- Depth: 29.00 in
- Width: 28.50 in
- Height: 3.50 in
- Weight: 17 lbs
FREQUENTLY ASKED QUESTIONS
Q: What size mini split systems is this line set for?
A: This line set is designed for 9,000 BTU and 12,000 BTU mini split systems.
Q: Are the line ends flared from the factory?
A: Yes. Both lines come factory-flared for secure connections.
Q: Can this line set be cut shorter?
A: Yes, but it must be properly cut and re-flared by a qualified installer.
Q: Is this a genuine MRCOOL line set?
A: Yes. This is an OEM MRCOOL accessory, not aftermarket tubing.
When installing line sets
When installing your MRCOOL system, handle refrigerant lines carefully to ensure optimal performance and prevent damage.
Bending the Copper Lines: Maintain a minimum 4-inch bend radius and use smooth curves instead of sharp angles to protect the lines and ensure proper refrigerant flow.
Avoid Repeated Bending: Bending copper lines more than three times can harden and weaken them, increasing the risk of breakage. Handle with care and minimize adjustments.
For best results, use gradual bends and consult a licensed professional or our support team if needed. MRCOOL DIRECT 615-553-8118
Why Buy From MRCOOL DIRECT?
When you order from MRCOOL Direct, you get:
- ✅ Authorized MRCOOL® dealer – Your warranty is protected
- ✅ Factory-fresh units – No refurbished or mystery sources
- ✅ Fast U.S. shipping – Most in-stock items ship in 1–3 business days
- ✅ Financing options – Make high-efficiency comfort more affordable
- ✅ Real product support – Help with sizing, line set selection, and DIY questions
- ✅ No third-party marketplace middlemen – Just genuine MRCOOL® systems from a trusted MRCOOL® dealer.
BUY DIRECT!
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615-553-8118
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