High-quality 50 ft copper refrigerant line set designed for mini split air conditioners, ductless HVAC systems, heat pumps, and residential or light commercial AC installations. Featuring industry-standard dimensions and durable insulation for reliable HVAC performance.
The Mini Split Air Conditioner Line Set is twin already. So buy it now.
Product Overview – Complete Mini Split Line Set
This 50 ft 1/4″ × 3/8″ copper line set includes both the liquid line (1/4″) and suction line (3/8″) needed for connecting indoor and outdoor components of mini split and HVAC systems. Constructed with 99.9% pure copper and factory insulative protection, it meets important HVAC standards for durability and performance.
Standard Copper Line Sizes for HVAC
1/4″ (6.35 mm) liquid line for refrigerant delivery
3/8″ (9.52 mm) suction line for refrigerant return
Common mini split line set configuration matching many residential units around 9,000 – 12,000 BTU capacity.
Ideal 50-Foot Length for Flexible Installations
Ample 50 ft tubing supports longer indoor-to-outdoor distances
Perfect for homes, apartments, rooftop units, or detached interior setups
Allows cleaner, less restrictive routing.
Factory Insulation – Thermal Protection & Durability
High-Density Insulation for Efficiency
The line set’s insulation is made of polypropylene or closed-cell foam, designed to reduce heat gain/loss along the copper tubing and maintain stable refrigerant temperatures.
UV-Resistant and Weather-Ready Jacket
The insulation meets ASTM E84, UL94, ASTM D1056, and ASTM G21 standards, making it UV-resistant and suitable for both indoor and outdoor HVAC line runs.
Wide Operating Temperature Range
Engineered to work reliably from –40 °C to 120 °C, ensuring performance in diverse climates and seasonal conditions without degradation.
Premium Construction – Long-Lasting HVAC Performance
99.9% Pure Copper Tubes
Made from 99.9% pure copper that meets ASTM B280 and C12200 standards, this line set delivers excellent heat transfer, corrosion resistance, and structural integrity for long-term HVAC use.
High Pressure Rating for Safety
With a pressure rating from 2100 – 7000 PSI, this line set far exceeds typical mini split refrigerant requirements (such as ~700 PSI for R410A systems), contributing to safer, more reliable installs.
HVAC Compatibility & Applications
Designed for Mini Split & Ductless AC Systems
This line set is ideal for use with:
Whether replacing existing lines or installing a new system, this kit supports consistent refrigerant flow and operational stability.
Works with Common Refrigerants
Compatible with widely used refrigerants such as R410A, R32, and other industry-standard HVAC refrigerant types when installed according to manufacturer specifications.
Features of pipe insulation tubing:
![White PE Embossed insulated pipe]( "insulated pipe")
Key Benefits of This Mini Split Line Set
Simplifies Installation for HVAC Professionals & DIYers
Ready-to-install copper line sets eliminate the need for custom tubing fabrication on site, saving installation time and reducing the risk of error.
Improves HVAC Efficiency
By maintaining consistent refrigerant temperature via factory insulation and high-quality copper construction, this line set supports improved energy efficiency and performance.
Reliable Long-Term Performance
Durable copper and insulation materials provide long-lasting service life in both indoor and outdoor HVAC environments.
Technical Specifications
| Feature | Detail |
| Length | 50 ft (15.24 m) |
| Liquid Line Size | 1/4″ (6.35 mm) |
| Suction Line Size | 3/8″ (9.52 mm) |
| Material | 99.9% Pure Copper |
| Insulation | Factory-applied, UV-resistant |
| Temperature Range | –40 °C to 120 °C |
| Pressure Rating | 2100–7000 PSI |
| Applications | Mini split, heat pump, ductless HVAC |
| Standards | ASTM B280, C12200, ASTM E84, UL94, ASTM D1056 |
Installation Tips for Best Results
Measure Distance Before Install
Confirm that the 50 ft line set meets the total run distance between your indoor and outdoor units to avoid unnecessary bends or tension.
Protect Line Insulation at Penetrations
Use wall sleeves or protective grommets where the line set passes through walls or structural elements to maintain insulation integrity.
Secure Lines With Proper Supports
Use appropriate HVAC line clamps or brackets every few feet to reduce vibration, sagging, and insulation wear over time.
![White PE copper line set]( "Copper Line Set")
Copper Line Set
Size | Length | Insulation White PE | Flame Resistant |
1/4+3/8 | 15m/20m/25m/30m/50m | 8mm/9mm/10mm/13mm/19mm/25.4mm | M1/B1 |
1/4+1/2 | 15m/20m/25m/30m/50m | 8mm/9mm/10mm/13mm/19mm/25.4mm | M1/B1 |
1/4+5/8 | 15m/20m/25m/30m/50m | 8mm/9mm/10mm/13mm/19mm/25.4mm | M1/B1 |
3/8+5/8 | 15m/20m/25m/30m/50m | 8mm/9mm/10mm/13mm/19mm/25.4mm | M1/B1 |
3/8+3/4 | 15m/20m/25m/30m/50m | 8mm/9mm/10mm/13mm/19mm/25.4mm | M1/B1 |
1/2+3/4 | 15m/20m/25m/30m/50m | 8mm/9mm/10mm/13mm/19mm/25.4mm | M1/B1 |
3/8+7/8 | 15m/20m/25m/30m/50m | 8mm/9mm/10mm/13mm/19mm/25.4mm | M1/B1 |
1/4 + 3/8 AC line set used for 0.75TON - 1.0TON mini split air conditioner.
1/4 + 1/2 Mini split line set used for 1.5TON - 2.0TON mini split air conditioning.
1/4 + 5/8 Copper line set used for 2.0TON - 2.5TON split air conditioner system.
3/8 + 5/8 Insulated copper tube apply for 3.0TON - 4.0TON ductless mini split air conditioner.
3/8 + 3/4 Insulated copper tubing used for 4.5TON - 6.0TON split air conditioner installation.
3/8 + 7/8 Insulated copper piping apply for 6.0TON - 8.0TON ductless mini split air conditioner.
Air conditioning copper line sets 1/4 + 3/8 used for 0.75P and 1P split air conditioning.
Copper pipe kit 1/4 + 1/2 commonly used for 1.5P and 2P mini split air conditioners.
1/4 + 5/8 Insulated copper line set used for 2P and 2.5air conditioner system.
3/8 + 5/8 Mini-split copper line set apply for 3P and 4P ductless mini split air conditioner.
3/8 + 3/4 Copper pipe kit used for 4.5P and 6P split aircon installation.
3/8 + 7/8 Insulated copper pipe apply for 6P - 8p TON ductless mini split air conditioner.
1/4 + 3/8 Mini split line set used for 9000BTU and 12000 BTU split air conditioner.
Copper line set 1/4 + 1/2 commonly used for 12000 BTU and 18000 BTU mini split air conditioners.
1/4 + 5/8 Insulated copper line set used for 24000 BTU and 30000 BTU air conditioner system.
3/8 + 5/8 Mini-split line set apply for 36000 BTU and 48000 ductless air conditioner.
3/8 + 3/4 Copper line set used for 54000 BTU and 72000 split air conditioner installation.
3/8 + 7/8 Insulated copper pipe apply for 72000 BTU - 96000 BTU ductless mini split air conditioner.
Aircon copper line set 1/4 + 3/8 used for 9K and 12K split air conditioner.
High quality copper line set 1/4 + 1/2 commonly used for 12K and 18K mini split air conditioners.
1/4 + 5/8 Insulated copper line set used for 24K and 30K air conditioner system.
3/8 + 5/8 Mini-split line set apply for 36K and 48K ductless air conditioner.
3/8 + 3/4 Copper line set used for 54K and 72K split air conditioner installation.
3/8 + 7/8 Insulated copper piping apply for 72K - 96K ductless mini split air conditioner.
Why Choose This 50 ft Mini Split Line Set
Trusted HVAC Quality & Durable Materials
High-purity copper and certified insulation make this line set a dependable choice for long-term HVAC performance and thermal efficiency.
Ready-to-Install and Time-Saving
Factory-insulated and pre-paired liquid and suction lines save installation time and improve job site efficiency.
Ideal for Residential & Light Commercial HVAC Projects
Designed to support mini split installations in homes, apartments, offices, and light commercial spaces where reliable refrigerant line performance is key.
DABUND FACTORY
We produce Insulated Copper Pipe, Mini Split Line Set and Aluminum Pipe and HVAC Parts
![Factory Profile]( "Factory Profile")
SGS Certificate
Mini Split Line Set is made of Polypropylene or Black Rubber with UV Resistant, meets ASTM E 84, UL94, ASTM D1056 and ASTM G 21
![证书]( "证书")
Exhibition
We join the exhibitions all over the word, just to facilitate customers to experience our mini split line set face to face.
![TRADE SHOW PARTICIPATION]( "TRADE SHOW PARTICIPATION")
FAQ
1.Q:What is your payment terms?
A:TT,L/C AT SIGHT,CREDIT CARD etc
2.Q:What is your delivery terms?
A:EXW, FOB, CFR, CIF etc
3.Q:Are you trading company or manufacturer?
A:Manufacturer
4.Q:May I get a sample?
A:Yes, we can send you 3pieces free samples.
You just charge for the express cost is ok.
5.Q:Can I print my logo?
A:Yes of cause, we accept OEM and ODM.
6.Q:How long is your delivery time?
A:Usually 15-20days, if urgent, we can arrange to do in advance and delivery fast.
7.What does “1/4″ × 3/8″” refer to?
It refers to the outer diameters of the refrigerant tubing — 1/4″ for the liquid line and 3/8″ for the suction line — a standard size pairing for many mini split cooling systems.
8.Is this line set insulated?
Yes — the copper tubing comes with factory-applied insulation that improves thermal performance and helps prevent condensation.
9.Can this be used outdoors?
Yes — the insulation is UV-resistant and weather-durable, making it suitable for outdoor refrigerant runs.
10. Is this compatible with R410A mini split systems?
Yes — this line set supports common refrigerants like R410A when installed correctly and sized according to system specifications.
