High-quality 75 ft pre-insulated copper tubing designed for HVAC, ductless air conditioner, and mini split installations — offering superior thermal efficiency, condensation control, and long-term durability.
The insulated copper tube is twin already. So buy it now.
Product Overview – Long Pre-Insulated Copper Tubing for HVAC Use
This 75 ft 1/4″ x 3/8″ pre-insulated copper tubing set includes factory-applied insulation to reduce heat transfer, prevent condensation, and improve system performance in ductless AC and HVAC refrigerant line applications. It’s suitable for both indoor routing and outdoor exposure.
Extended 75 ft Length for Flexible HVAC Layouts
Ideal for long runs between indoor and outdoor units
Perfect for multi-story installations, rooftop units, and distant unit placements
Eliminates the need for couplings or additional extension tubes
Standard 1/4″ x 3/8″ Copper Line Sizes
Factory-Applied Insulation for Thermal Performance
Enhanced Insulation Reduces Heat Loss and Condensation
UV-Resistant and Weather-Ready Insulation
The insulation jacket is UV-resistant and durable enough for outdoor environments
Protects the tubing from sunlight, moisture, and temperature differences
Built-In Protection Against Moisture & Mold
Insulation materials meet industry safety standards
Prevents surface condensation and moisture damage, protecting walls and structures
Features of pipe insulation tubing:
![White PE Embossed insulated pipe]( "insulated pipe")
Premium Copper Construction for HVAC Reliability
99.9% Pure Copper for Long-Lasting Performance
Made with 99.9% pure copper tubing, this line set delivers excellent thermal conductivity, corrosion resistance, and mechanical strength needed in HVAC systems.
Conforms to HVAC Industry Standards
Compatibility & HVAC Applications
Designed for Mini Split and Ductless AC Systems
This tubing is ideal for:
Mini split air conditioner installations
Ductless heat pump systems
Residential and light commercial HVAC setups
Works with Common Refrigerants
Compatible with modern HVAC refrigerants including R410A, R32, and others, meeting typical working pressures and safety standards.
Key Benefits of Pre-Insulated Copper Tubing
Saves Installation Time & Labor
Factory insulation eliminates field wrapping, reducing installation complexity and labor costs.
Improves System Efficiency
Pre-insulated tubing minimizes heat gain/loss and condensation, improving system performance and reducing energy waste.
Cleaner, More Professional Installations
Pre-insulated tubing provides a neater, more professional finish than field-wrapped alternatives.
Technical Specifications
Length: 75 ft (22.86 m)
Line Sizes: 1/4″ (liquid) × 3/8″ (suction)
Material: 99.9% pure copper tubing
Insulation: Factory-applied, UV-resistant
Application: HVAC, mini split AC, ductless heat pump systems
Installation Tips for Best Results
Confirm Line Length and Routing Before Installation
Measure the distance between indoor and outdoor units and confirm your routing path to avoid tight bends.
Protect Insulation at Wall Penetrations
Use provided wall pipe or sleeve where the line penetrates walls to protect insulation and tubing.
Secure Lines Properly for Long Runs
Use appropriate clamps and supports to secure tubing and prevent vibration, sagging, or damage.
![White PE copper line set]( "Copper Line Set")
Pre Insulated Copper Tubing
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 Pre insulated copper tubing 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 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 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 tubing 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 Pre 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 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 This Pre-Insulated Copper Tubing?
Quality, Efficiency, and Ease of Installation
With premium copper, factory insulation, and extended length, this pre-insulated tubing supports efficient HVAC performance, shorter installation time, and professional-grade results for residential and commercial applications.
DABUND FACTORY
We produce Insulated Copper Pipe, Mini Split Line Set and Aluminum Pipe and HVAC Parts
![DABUND FACTORY]( "222")
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.
![2.jpg]( "2.jpg")
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″ x 3/8″” refer to in this line set?
It refers to the outer diameters of the copper tubes — 1/4″ for the liquid refrigerant line and 3/8″ for the suction line, a standard size for many mini split HVAC applications.
8.Can this tubing be used outdoors?
Yes — the factory-applied insulation is UV-resistant and suitable for outdoor exposure. It withstands sunlight, rain, and temperature variations.
9.Do I need extra insulation on site?
No — the pre-insulated design eliminates the need for additional field insulation in most installations.
10.Is this tubing compatible with R410A and R32 refrigerants?
Yes — this copper tubing is designed to work with common refrigerants like R410A, R32, and other HVAC refrigerants, meeting typical pressure requirements.
