Premium 75 ft pre-insulated copper tubing with 1/2″ liquid line and 3/4″ suction line — engineered for reliable refrigerant transfer in mini split air conditioners, ductless heat pumps, and other split system HVAC installations that require extended line runs.
H2: Product Overview – High-Performance HVAC Refrigerant Tubing
This pre-insulated copper tubing set provides a continuous 75 ft line run with factory-applied insulation, helping maintain stable refrigerant temperatures, reduce thermal loss, and minimise condensation. It’s ideal for ductless air conditioning systems and split HVAC units with medium to long distances between indoor and outdoor components.
H3: Standard Line Sizes – Explained
1/2″ (≈12.70 mm) Liquid Line – delivers high-pressure refrigerant from the outdoor unit to the indoor coil.
3/4″ (≈19.05 mm) Suction Line – returns low-pressure refrigerant vapour back to the compressor.
A widely accepted size pairing for many residential and commercial mini split installations.
H3: Factory-Applied Insulation for Thermal Efficiency
Maintains consistent refrigerant temperature along the line.
Reduces heat gain/loss over longer distances.
Prevents “sweating” (condensation) on line surfaces.
Eliminates the need for extra field-wrapped insulation.
H2: Key Features & Benefits
H3: Extended 75 ft Line Run for Flexible Installation
With 75 ft of continuous tubing, this line set offers installation flexibility where indoor and outdoor units are far apart — common in homes with attic or rooftop outdoor units, multi-story buildings, or long-run HVAC setups.
H3: Improved Energy Efficiency & Stable System Performance
Factory insulation helps minimise thermal loss, which supports more stable temperature control, better cooling/heating efficiency, and reduced system energy consumption over time.
H3: Durable Copper Construction for Long-Term Use
Constructed from 99.9% pure copper, this line set delivers excellent corrosion resistance, strong mechanical performance, and sustained durability for long-term HVAC reliability.
Features of pipe insulation tubing:
● Pipe Insulation, Material Black Rubber, Temp Range -40 Degrees to 120 Degrees.
● The pipe insulation has a better function of moisture condensation. Insulation material is both the insulation layer and moisture-proof layer.
● There is no need to drop the water vapor permeation protective layer so that it has a better moisture condensation function.
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HVAC Compatibility & Applications
Ideal for Mini Split & Ductless Systems
This tubing set is suitable for use with:
Mini split air conditioners
Ductless heat pump systems
Split HVAC units
Residential and light commercial HVAC installations
Whether replacing existing lines or installing new systems, this set provides dependable performance.
Works With Standard HVAC Refrigerants
Designed for compatibility with common HVAC refrigerants, including:
Technical Specifications
| Feature | Specification |
| Tubing Length | 75 ft (≈22.86 m) |
| Liquid Line Diameter | 1/2″ (≈12.70 mm) |
| Suction Line Diameter | 3/4″ (≈19.05 mm) |
| Material | 99.9% Pure Copper |
| Insulation | Factory-applied thermal insulation |
| Applications | Mini split, ductless AC, heat pump systems |
| Refrigerant Compatibility | R410A, R32, and similar HVAC refrigerants |
| Installation | Pre-insulated and ready for connection |
Installation Tips for Optimal Performance
Plan Line Routing Before Installation
Measure the total distance between indoor and outdoor units to confirm that the 75 ft line run is appropriate. Planning reduces unnecessary bends and preserves refrigerant flow efficiency.
Protect Insulation at Wall Penetrations
Use protective sleeves or grommets where the line set passes through walls or structures. This helps preserve the insulation and prevents wear or damage.
Secure Line Set with Proper Supports
Use HVAC-rated clamps or straps along the line path to prevent sagging, reduce vibration, and maintain insulation integrity over time.
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Pre Insulated Copper Tubing
Size | Length | Insulation Black Rubber | 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/25.4m, | M1/B1 |
1/4 + 3/8 Pre Insulated copper tubing used for 0.75TON - 1.0TON mini split air conditioner.
1/4 + 1/2 All Insulated copper line set used for 1.5TON - 2.0TON mini split air conditioning.
1/4 + 5/8 Insulated copper piping 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 Pre insulated copper tubing 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 piping 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.
All 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 Insulated copper tubing 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 Pre insulated copper tubing used for 54K and 72K split air conditioner installation.
3/8 + 7/8 Insulated copper pipe apply for 72K - 96K ductless mini split air conditioner.
Why Choose 1/2 in. x 3/4 in. x 75 ft. Pre Insulated Copper Tubing from DABUND PIPE
Trusted HVAC Line Set for Longer Runs
With a continuous 75 ft length and high-quality insulation, this tubing set meets the needs of long run installations without the complications of multiple couplings or field insulation.
Improves System Reliability & Efficiency
The insulated design helps reduce energy loss and temperature variation, supporting more efficient operation and improved performance of HVAC systems.
Durable Materials Ensure Long-Term Use
Made from high-purity copper and robust insulation materials, this line set is designed for the long haul — resisting corrosion, environmental wear, and repeated thermal cycling.
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
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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 “1/2 in × 3/4 in” mean?
It refers to the outer diameters of the refrigerant tubing: 1/2″ for the liquid line (refrigerant feed) and 3/4″ for the suction line (refrigerant return). This configuration is common in many residential and commercial mini split and HVAC systems.
8.Is this tubing insulated?
Yes — this product includes factory-applied insulation that improves thermal performance, minimises condensation, and eliminates the need for extra field-wrapped insulation in most installations.
9.Can this line set be used outdoors?
Absolutely — the insulation jacket is designed to be UV-resistant and weather-durable, making it suitable for outdoor line runs between indoor and outdoor HVAC units.
10.Is this compatible with R410A systems?
Yes — this pre-insulated copper tubing set supports common HVAC refrigerants like R410A and R32, provided it’s installed according to manufacturer guidelines and local codes.
