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DBJ-003
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DABUND
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Copper
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1M - 10M
Material
Color
Keywords
Application
35 ft 3/8" x 5/8" Insulated Copper Pipe for Mini Split and HVAC Systems
The DABUND 35 ft 3/8" x 5/8" insulated copper pipe is designed for professional mini split, HVAC, heat pump, and refrigeration installations. This pre-insulated copper line set connects the indoor evaporator unit and outdoor condenser unit, allowing refrigerant to circulate efficiently throughout the air conditioning system.
Manufactured from 99.9% pure copper tubing, the pipe can meet ASTM B280 and C12200 standards according to product specification. It provides excellent thermal conductivity, corrosion resistance, pressure tolerance, and long service life for modern HVAC refrigeration systems.
The 35 ft coil length supports flexible indoor-to-outdoor routing while reducing unnecessary pipe joints. Fewer joints can help lower refrigerant leakage risks and improve installation reliability for residential and commercial HVAC projects.
Key Specifications of the 3/8" x 5/8" Insulated Copper Line Set
This HVAC copper line set is manufactured for reliable refrigerant flow, thermal protection, and long-term air conditioning system performance.
| Specification | Detail |
|---|---|
| Product Name | 35 ft 3/8" x 5/8" Insulated Copper Pipe |
| Product Type | Pre-insulated HVAC copper line set |
| Copper Pipe Size | 3/8" + 5/8" / 9.52 mm + 15.88 mm |
| Length | 35 ft / 10.7 m |
| Material | 99.9% pure copper |
| Insulation Type | Closed-cell polyethylene foam / rubber insulation |
| Temperature Range | -40°C to 120°C |
| Pressure Rating | 2100–7000 PSI according to product specification |
| Standards | ASTM B280, ASTM E84, UL94, ASTM D1056, ASTM G21 according to selected specification |
| Typical HVAC Capacity | 3–4 ton / 36,000–48,000 BTU systems when specified by equipment manufacturer |
High-Purity Copper Tubing for Reliable Refrigerant Flow
The copper pipes used in this insulated line set are made from 99.9% pure copper, providing strong heat transfer efficiency, mechanical strength, and corrosion resistance.
Superior thermal conductivity for efficient cooling and heating performance
Excellent corrosion resistance for long-term HVAC operation
High pressure tolerance for modern refrigerants when specifications match
Reliable refrigerant transmission for mini split and HVAC systems
Because of these advantages, copper tubing is widely used in air conditioning and refrigeration piping systems worldwide.
99.9% Pure Copper
White PE Insulated Pipe
Copper Nut
Pipe Insulation Tubing Features
The insulation tubing is designed to protect the copper line set from heat transfer, moisture, UV exposure, and mechanical wear. It helps maintain refrigerant temperature stability and reduce condensation during HVAC operation.
Thermal Insulation Pipe Production
Insulated Pipe Warehouse
Inner Layer Insulated Pipe
Durable Three-Layer Insulation Design
The insulation surrounding the copper pipe features a three-layer protection structure designed for durability, thermal efficiency, and long-term HVAC reliability.
Outer Layer: UV-Resistant PE Film
The embossed polyethylene film is UV resistant and anti-aging, helping protect the pipe from sunlight, outdoor exposure, and environmental damage.
Middle Layer: High-Density IXPE Foam
The high-density IXPE foam layer provides thermal insulation, impact resistance, and added protection during handling and installation.
Inner Layer: Closed-Cell Moisture Barrier
The closed-cell insulation layer helps prevent moisture penetration and supports stable temperature performance around the copper pipe.
Flexible Insulated Copper Coil for Easy HVAC Installation
The 35-foot copper pipe coil allows HVAC technicians to route refrigerant lines through walls, ceilings, floors, and tight installation spaces more easily.
Easy cutting to required installation length
Reduced number of connectors and joints
Faster installation process
Lower risk of refrigerant leakage
This flexibility makes the line set suitable for both residential and commercial HVAC installations.
Wide Applications for Air Conditioning and Refrigeration Systems
The 3/8" + 5/8" insulated copper line set is widely used in HVAC and refrigeration applications where the equipment manufacturer specifies this line size.
Ductless mini split air conditioners
Heat pump systems
VRF / VRV air conditioning systems
Residential air conditioning installations
Commercial refrigeration equipment
This line set size is typically used for 3 ton to 4 ton mini split air conditioners, approximately 36,000–48,000 BTU, when the HVAC system requires a 3/8" liquid line and 5/8" suction line.
High Pressure Resistance for Modern Refrigerants
Modern HVAC systems often operate with high-pressure refrigerants such as R410A and R32. This insulated copper pipe offers a pressure rating of 2100–7000 PSI according to product specification, supporting safe refrigerant transport when system requirements match.
Multiple Insulation Options for Different HVAC Installations
To meet different installation environments, the insulated copper pipe is available with multiple insulation materials and thickness options.
| Insulation Option | Available Thickness | Typical Use |
|---|---|---|
| White PE insulation | 8 mm / 9 mm / 10 mm / 13 mm / 19 mm / 25.4 mm | Standard indoor and outdoor HVAC installations |
| Black rubber insulation | Custom thickness according to project requirement | Projects requiring flexible and durable insulation performance |
Custom Copper Line Sets for HVAC Projects
DABUND provides customization services for HVAC distributors, contractors, importers, and private label brands that need custom insulated copper line set solutions.
Custom copper pipe diameters
Different insulation thicknesses
Custom pipe lengths
OEM logo printing on insulation
Private label packaging
Insulated Copper Pipe Size Options
| Size | Length | Insulation White PE | Flame Resistant |
| 1/4 + 3/8 | 3m / 4m / 5m / 7m / 10m | 8mm / 9mm / 10mm / 13mm / 19mm / 25.4mm | M1 / B1 |
| 1/4 + 1/2 | 3m / 4m / 5m / 7m / 10m | 8mm / 9mm / 10mm / 13mm / 19mm / 25.4mm | M1 / B1 |
| 1/4 + 5/8 | 3m / 4m / 5m / 7m / 10m | 8mm / 9mm / 10mm / 13mm / 19mm / 25.4mm | M1 / B1 |
| 3/8 + 5/8 | 3m / 4m / 5m / 7m / 10m | 8mm / 9mm / 10mm / 13mm / 19mm / 25.4mm | M1 / B1 |
| 3/8 + 3/4 | 3m / 4m / 5m / 7m / 10m | 8mm / 9mm / 10mm / 13mm / 19mm / 25.4mm | M1 / B1 |
| 1/2 + 3/4 | 3m / 4m / 5m / 7m / 10m | 8mm / 9mm / 10mm / 13mm / 19mm / 25.4mm | M1 / B1 |
| 3/8 + 7/8 | 3m / 4m / 5m / 7m / 10m | 8mm / 9mm / 10mm / 13mm / 19mm / 25.4mm | M1 / B1 |
Line Set Size and HVAC Capacity Reference
| Line Set Size | Common Ton / HP Range | Common BTU Range | Typical Application |
|---|---|---|---|
| 1/4 + 3/8 | 0.75 ton – 1.0 ton / 0.75P – 1P | 9000–12000 BTU / 9K–12K | Small mini split air conditioner |
| 1/4 + 1/2 | 1.5 ton – 2.0 ton / 1.5P – 2P | 12000–18000 BTU / 12K–18K | Medium mini split air conditioner |
| 1/4 + 5/8 | 2.0 ton – 2.5 ton / 2P – 2.5P | 24000–30000 BTU / 24K–30K | Split AC and heat pump system |
| 3/8 + 5/8 | 3.0 ton – 4.0 ton / 3P – 4P | 36000–48000 BTU / 36K–48K | Ductless commercial air conditioner |
| 3/8 + 3/4 | 4.5 ton – 6.0 ton / 4.5P – 6P | 54000–72000 BTU / 54K–72K | Large split AC installation |
| 3/8 + 7/8 | 6.0 ton – 8.0 ton / 6P – 8P | 72000–96000 BTU / 72K–96K | High-capacity ductless HVAC system |
Why Choose DABUND Insulated Copper Pipe?
DABUND is a professional HVAC manufacturer with extensive experience in producing insulated copper line sets, mini split line sets, HVAC installation kits, aluminum pipes, and HVAC parts for global customers.
Over 14 years of manufacturing experience
Two production factories with large capacity
Monthly output of 1,000,000 pieces
Strict quality inspection processes
Competitive factory pricing
OEM and private label support for HVAC distributors
DABUND products are exported to North America, Europe, the Middle East, Southeast Asia, and other markets, supporting HVAC distributors, contractors, and project buyers worldwide.
DABUND Factory
We produce insulated copper pipe, mini split line set, aluminum pipe, and HVAC parts for global HVAC customers.
SGS Certificate
DABUND mini split line set insulation can be made of polypropylene or black rubber with UV resistance and can meet ASTM E84, UL94, ASTM D1056, and ASTM G21 standards according to product specification.
Exhibition
DABUND joins HVAC exhibitions worldwide to help customers evaluate mini split line sets, insulated copper pipes, HVAC line sets, and HVAC parts face to face.
FAQ
What is a 3/8" x 5/8" insulated copper pipe used for?
A 3/8" x 5/8" insulated copper pipe is commonly used as a refrigerant line set in mini split air conditioners, heat pumps, and HVAC refrigeration systems. It connects the indoor evaporator and outdoor condenser units so refrigerant can circulate efficiently.
What size air conditioner uses a 3/8" x 5/8" line set?
A 3/8" liquid line and 5/8" suction line is typically used for 3-ton to 4-ton air conditioning systems, usually around 36,000–48,000 BTU. The final line set size should always follow the HVAC equipment manufacturer’s specification.
Why is copper preferred for HVAC line sets?
Copper is preferred for HVAC refrigerant piping because it provides excellent thermal conductivity, durability, corrosion resistance, and pressure tolerance. It is also flexible enough for professional flaring and installation.
How long does an insulated copper HVAC line set last?
A high-quality insulated copper line set can provide long service life when properly installed and maintained. Copper resists corrosion, while durable insulation helps protect the pipe from UV exposure, moisture, and mechanical damage.
Can a 35 ft insulated copper pipe be cut to different lengths?
Yes. A 35 ft copper line set can be cut to the required length during HVAC installation. Technicians often adjust the pipe length according to the actual distance between indoor and outdoor units.
What type of insulation is used on HVAC copper pipes?
Most insulated copper pipes use closed-cell polyethylene foam or rubber insulation. This helps provide thermal protection, prevent condensation, and protect the refrigerant line from UV exposure and moisture.
Is this insulated copper pipe compatible with modern refrigerants?
Yes. High-quality copper line sets can be compatible with modern refrigerants such as R410A, R32, and other HVAC refrigerants when the pipe size, wall thickness, pressure rating, and HVAC system requirements match.
Can insulated copper pipes be used for both residential and commercial HVAC systems?
Yes. Insulated copper pipes are widely used in residential and commercial HVAC installations, including mini split systems, central air conditioning units, heat pumps, and refrigeration equipment.
What insulation thickness is best for HVAC copper pipes?
The ideal insulation thickness depends on the installation environment and climate. Common options include 8 mm, 9 mm, 10 mm, 13 mm, 19 mm, and 25.4 mm. Outdoor or high-temperature environments often require thicker insulation.
Why choose a professional insulated copper pipe manufacturer?
A professional HVAC copper pipe manufacturer provides stable product quality, high-purity copper tubing, durable insulation materials, international standard support, OEM customization, and reliable export supply for distributors and contractors.
