MRCOOL® 25FT 1/4 x 1/2 Flared Line Set Kit for (9K, 12K and 18K), Olympus and Advantage Mini Split, MC25-1412
MRCOOL® 25FT 1/4 x 1/2 Flared Line Set Kit for (9K, 12K and 18K), Olympus and Advantage Mini Split, MC25-1412
Product Description
The MRCOOL® MC25-1412 Mini Split Line Set Kit is a 25-foot flared copper refrigerant line set engineered specifically for 9,000, 12,000 and 18,000 BTU ductless mini split systems. Proper line sizing is critical to system efficiency, compressor protection, and long-term reliability—this line set is built to meet those exact demands.
Manufactured from refrigeration-grade copper, the MC25-1412 delivers excellent heat transfer, corrosion resistance, and durability for both residential and light commercial applications. The factory-flared ends ensure secure, leak-resistant connections when paired with compatible MRCOOL and industry-standard mini split equipment.
Featuring a 1/4" liquid line and a 1/2" suction line, this line set is correctly sized for higher-capacity indoor units that require increased refrigerant flow. The 25-foot length provides installation flexibility without excessive excess tubing that could negatively impact system performance.
Whether you’re installing a new mini split system, replacing an existing line set, or upgrading capacity, the MRCOOL MC25-1412 delivers OEM-grade performance trusted by homeowners and HVAC professionals.
KEY FEATURES & BENEFITS
- 25-Foot Line Length – Ideal for standard residential installs
- Designed for 9K, 12k and 18K Mini Splits – Correct sizing for higher capacity systems
- 1/4" Liquid × 1/2" Suction Lines – Balanced refrigerant flow
- Refrigeration-Grade Copper – Long-lasting, corrosion-resistant material
- Factory-Flared Ends – Secure, leak-resistant connections
- OEM MRCOOL Accessory – Guaranteed compatibility and quality
- Flexible & Easy to Route – Simplifies installation
TECHNICAL SPECIFICATIONS
- Brand: MRCOOL
- Series: Mini Split Line Set
- Model: MC25-1412
- 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: 1/2"
- Suction Line Fitting: 5/8"
- 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: 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 designed for?
A: This line set is designed for 9,000, 12,000 and 18,000 BTU mini split systems.
Q: Are the line ends factory flared?
A: Yes. Both copper lines come factory-flared for proper sealing.
Q: Can this line set be shortened if needed?
A: Yes, but it must be cut and re-flared properly by a qualified installer.
Q: Is this an OEM MRCOOL product?
A: Yes. This is a genuine MRCOOL OEM accessory, not aftermarket tubing.
When installing line sets
When installing your MRCOOL system, handle refrigerant lines carefully to ensure optimal performance and prevent damage.
Prepare Components: Ensure all necessary components, including the line set, outdoor condenser unit, and indoor air handler, are ready for installation.
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.
Connect Flared Ends: Attach the 1/4" and 3/8" flared ends of the line set to the corresponding ports on the outdoor condenser unit and indoor air handler, ensuring a secure and leak-free connection.
Secure and Protect: Properly secure the line set along its path and protect it from potential damage, ensuring optimal performance and longevity.
Professional Charging: As the line set is not pre-charged, have a certified HVAC professional charge the system with the appropriate refrigerant to meet your specific requirements
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!
Feel Free to call us anytime. Family Friendly help just a dial away. We love talking HVAC
615-553-8118
Family owned & USAs #1 MRCOOL® Authentication Dealer.
Description
Product Description
The MRCOOL® MC25-1412 Mini Split Line Set Kit is a 25-foot flared copper refrigerant line set engineered specifically for 9,000, 12,000 and 18,000 BTU ductless mini split systems. Proper line sizing is critical to system efficiency, compressor protection, and long-term reliability—this line set is built to meet those exact demands.
Manufactured from refrigeration-grade copper, the MC25-1412 delivers excellent heat transfer, corrosion resistance, and durability for both residential and light commercial applications. The factory-flared ends ensure secure, leak-resistant connections when paired with compatible MRCOOL and industry-standard mini split equipment.
Featuring a 1/4" liquid line and a 1/2" suction line, this line set is correctly sized for higher-capacity indoor units that require increased refrigerant flow. The 25-foot length provides installation flexibility without excessive excess tubing that could negatively impact system performance.
Whether you’re installing a new mini split system, replacing an existing line set, or upgrading capacity, the MRCOOL MC25-1412 delivers OEM-grade performance trusted by homeowners and HVAC professionals.
KEY FEATURES & BENEFITS
- 25-Foot Line Length – Ideal for standard residential installs
- Designed for 9K, 12k and 18K Mini Splits – Correct sizing for higher capacity systems
- 1/4" Liquid × 1/2" Suction Lines – Balanced refrigerant flow
- Refrigeration-Grade Copper – Long-lasting, corrosion-resistant material
- Factory-Flared Ends – Secure, leak-resistant connections
- OEM MRCOOL Accessory – Guaranteed compatibility and quality
- Flexible & Easy to Route – Simplifies installation
TECHNICAL SPECIFICATIONS
- Brand: MRCOOL
- Series: Mini Split Line Set
- Model: MC25-1412
- 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: 1/2"
- Suction Line Fitting: 5/8"
- 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: 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 designed for?
A: This line set is designed for 9,000, 12,000 and 18,000 BTU mini split systems.
Q: Are the line ends factory flared?
A: Yes. Both copper lines come factory-flared for proper sealing.
Q: Can this line set be shortened if needed?
A: Yes, but it must be cut and re-flared properly by a qualified installer.
Q: Is this an OEM MRCOOL product?
A: Yes. This is a genuine MRCOOL OEM accessory, not aftermarket tubing.
When installing line sets
When installing your MRCOOL system, handle refrigerant lines carefully to ensure optimal performance and prevent damage.
Prepare Components: Ensure all necessary components, including the line set, outdoor condenser unit, and indoor air handler, are ready for installation.
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.
Connect Flared Ends: Attach the 1/4" and 3/8" flared ends of the line set to the corresponding ports on the outdoor condenser unit and indoor air handler, ensuring a secure and leak-free connection.
Secure and Protect: Properly secure the line set along its path and protect it from potential damage, ensuring optimal performance and longevity.
Professional Charging: As the line set is not pre-charged, have a certified HVAC professional charge the system with the appropriate refrigerant to meet your specific requirements
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!
Feel Free to call us anytime. Family Friendly help just a dial away. We love talking HVAC
615-553-8118
Family owned & USAs #1 MRCOOL® Authentication Dealer.
