The 1/4″ × 1/2″ × 50 ft insulated copper tube is a premium HVAC refrigerant line set with factory-applied insulation, engineered to maintain optimal thermal performance for mini split air conditioners, ductless heat pumps, and other split HVAC systems where reliable refrigerant transfer is essential.
The insulated copper tube is twin already. So buy it now.
Product Overview – Insulated Copper Refrigerant Line
This insulated copper tube includes:
A 1/4″ liquid line (6.35 mm)
A 1/2″ suction line (12.70 mm)
A continuous 50 ft length
With factory-applied insulation, this tube set helps preserve refrigerant temperature, reduce energy loss, and minimize condensation — making it ideal for both residential and light commercial HVAC installations.
What Do 1/4″ & 1/2″ Mean?
1/4″ Liquid Line: Carries high-pressure refrigerant from outdoor to indoor units.
1/2″ Suction Line: Returns low-pressure refrigerant vapor back to the compressor.
This size pairing is a standard configuration for many mini split and ductless HVAC systems.
Factory-Applied Insulation Benefits
Maintains temperature stability along the refrigerant line
Minimizes heat gain and heat loss
Reduces condensation (sweating) on the tube surface
Saves installation time compared with field-wrapped insulation
Key Features & Benefits
Designed for Efficient Refrigerant Transfer
With factory insulation and premium copper construction, this tube set supports efficient refrigerant flow and reduces unnecessary load on compressors — helping your HVAC system operate smoothly and reliably.
Durable and Corrosion-Resistant Copper
Constructed from 99.9% pure copper, this tube offers excellent corrosion resistance, high thermal conductivity, and strong mechanical durability for long-term HVAC performance.
Reduces Moisture Issues and Condensation
Pre-insulated lines are designed to minimize surface condensation, protecting nearby structures and finishing materials from potential water damage or staining in humid environments.
Features of pipe insulation tubing:
![White PE Embossed insulated pipe]( "insulated pipe")
HVAC Compatibility & Applications
Ideal for Mini Split and Ductless Systems
This 50 ft insulated copper tube works well with:
Mini split air conditioners
Ductless heat pump systems
Residential split HVAC installations
Light commercial cooling and heating systems
The 50 ft length offers flexibility for typical indoor-to-outdoor unit distances.
Compatible with Standard HVAC Refrigerant Types
Engineered to be used with widely applied refrigerants including:
Technical Specifications
| Feature | Specification |
| Line Set Length | 50 ft (~15.24 m) |
| Liquid Line Diameter | 1/4″ (≈6.35 mm) |
| Suction Line Diameter | 1/2″ (≈12.70 mm) |
| Material | 99.9% Pure Copper |
| Insulation | Factory-applied thermal insulation |
| Applications | Mini split, ductless AC, heat pumps |
| Compatible Refrigerants | R410A, R32, and similar HVAC refrigerants |
| Installation | Pre-insulated and ready to connect |
Installation Tips for Best Performance
Plan Your Line Routing Before Installation
Measure the total distance between indoor and outdoor units before installation. Planning the routing path ensures fewer sharp bends and helps protect the insulation from compression or damage.
Protect Insulation Where Tubing Passes Through Walls
Install using sleeves or grommets at any wall penetrating point to protect insulation from abrasion and maintain thermal performance.
Use Proper Supports Along the Line Run
Secure the tubing with HVAC-rated straps, clips, or brackets to reduce vibration, prevent sagging, and maintain insulation integrity over time.
![White PE copper line set]( "Copper Line Set")
Insulated Copper Tube
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 tube 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.
Insulated copper tube 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 Insulated copper pipe 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 tube 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 Insulated copper pipe 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 1/4" x 1/2" x 50 ft Insulated Copper Tube from DABUND PIPE
Stable Thermal Performance
Factory insulation helps preserve refrigerant temperatures, reducing the system’s energy loss and improving overall HVAC efficiency.
Easy Installation Saves Time
Pre-insulated lines eliminate the added labor of field insulation wrapping, making installation faster and more consistent, particularly for professional HVAC technicians.
Reliable for Residential & Commercial Needs
Whether your project is a home mini split installation or a ductless heat pump setup in a commercial space, this insulated copper tube set provides long-lasting performance and peace of mind.
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]( "TRADE SHOW")
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″ × 1/2″” refer to?
It describes the outer diameters of the two tubes: a 1/4″ liquid line for refrigerant feed and a 1/2″ suction line for refrigerant return — a common configuration for many mini split installations.
8.Is this copper tube insulated?
Yes — this product includes factory-applied insulation that helps minimize thermal loss and condensation without requiring field insulation wrapping in most installation scenarios.
9.Can it be used outdoors?
Absolutely — the insulation jacket is UV-resistant and weather-durable, making it suitable for refrigerant line runs between indoor and outdoor units.
10.Is this compatible with R410A systems?
Yes — this insulated copper tube supports standard refrigerants including R410A and R32 when installed according to manufacturer guidelines and local building codes.
