MRCOOL® 25FT 3/8 x 5/8 Flared Line Set Kit for (24K- 36k), Olympus and Advantage Mini Split, MC25-3858
MRCOOL® 25FT 3/8 x 5/8 Flared Line Set Kit for (24K- 36k), Olympus and Advantage Mini Split, MC25-3858
Available in stock (210)
Product Description
The MRCOOL® MC25-3858 Mini Split Line Set Kit is a 25-foot flared copper refrigerant line set engineered specifically for 24,000 BTU and 36,000 BTU ductless mini split systems. It delivers the correct line sizing required for optimal refrigerant flow, system efficiency, and long-term compressor protection.
Manufactured from high-quality refrigeration-grade copper, this line set offers excellent thermal transfer, corrosion resistance, and durability in both residential and light commercial installations. The factory-flared ends ensure tight, leak-resistant connections when paired with compatible MRCOOL and industry-standard mini split systems.
Featuring a 3/8" liquid line and a 5/8" suction line, the MC25-3858 is properly sized for 24K and 36k air handlers, helping maintain correct system pressures and consistent heating and cooling performance. The 25-foot length provides ideal flexibility for standard installations while avoiding unnecessary excess line length.
Whether you’re installing a new mini split, replacing an existing line set, or upgrading to a higher-capacity system, the MRCOOL MC25-3858 delivers professional-grade reliability trusted by HVAC installers nationwide.
KEY FEATURES & BENEFITS
- 25-Foot Line Length – Ideal for standard residential installs
- Designed for 24K and 36k Mini Splits – Proper sizing for peak performance
- 3/8" Liquid × 5/8" 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: MC25-3858
- Unit Type: Accessory
- Equipment Type: Line Set
LINE SET DETAILS
- Line Set Length: 25 ft
- Maximum Line Set Length: 25 ft
- Liquid Line Size: 3/8"
- Liquid Line Fitting: 1/2"
- Suction Line Size: 5/8"
- Suction Line Fitting: 3/4"
- Fitting Type: Flared
- Refrigerant: Not pre-charged
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: 125
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 system is this line set for?
A: This line set is designed for 24,000 BTU and 36,000 BTU mini split systems.
Q: Are the line ends flared?
A: Yes. Both the liquid and suction lines come factory-flared.
Q: Can this line set be shortened?
A: Yes, but it must be cut and re-flared properly by a qualified installer.
Q: Is this an OEM MRCOOL line set?
A: Yes. This is a genuine MRCOOL OEM accessory.
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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