The 35 ft 3/8" x 5/8" insulated copper pipe is designed for professional HVAC and refrigeration installations. This insulated copper line set connects the indoor evaporator and outdoor condenser units, allowing refrigerant to circulate efficiently throughout the system.
Manufactured from 99.9% pure copper tubing, the pipe meets ASTM B280 and C12200 standards, ensuring excellent thermal conductivity, corrosion resistance, and long service life. The 35-foot coil length makes installation easier and reduces the number of pipe joints, helping improve system efficiency and reliability.
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Key Specifications of the 3/8" x 5/8" Insulated Copper Line Set
This HVAC copper line set is manufactured to meet international standards and provide reliable refrigerant flow for air conditioning systems.
Product Specifications
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
Standards: ASTM B280, ASTM E84, UL94, ASTM D1056, ASTM G21
These specifications ensure excellent durability, thermal insulation, and reliable performance in HVAC refrigeration systems.
High-Purity Copper Tubing for Reliable Refrigerant Flow
The copper pipes used in this insulated line set are made from high-purity 99.9% copper, providing excellent heat transfer efficiency and mechanical strength.
Benefits of copper tubing include:
Superior thermal conductivity for efficient cooling
Excellent corrosion resistance
High pressure tolerance for modern refrigerants
Long service life in HVAC installations
Because of these advantages, copper tubing is widely used in air conditioning and refrigeration piping systems worldwide.
Features of pipe insulation tubing:
![White PE Embossed insulated pipe]( "insulated pipe")
Durable Three-Layer Insulation Design
The insulation surrounding the copper pipe features a three-layer protection structure designed for durability and energy efficiency.
Outer Layer
Embossed polyethylene film that is UV resistant and anti-aging, protecting the pipe from sunlight and environmental damage.
Middle Layer
High-density IXPE foam that provides strong thermal insulation and impact resistance.
Inner Layer
Closed-cell insulation that prevents moisture penetration and maintains stable temperature performance.
This multi-layer design helps improve HVAC system efficiency while protecting the copper tubing from external damage.
Flexible Insulated Copper Coil for Easy HVAC Installation
The 35-foot copper pipe coil allows HVAC technicians to easily route the refrigerant lines through walls, ceilings, or floors during installation.
Advantages include:
Easy cutting to custom lengths
Reduced number of connectors
Faster installation process
Lower risk of refrigerant leakage
This flexibility makes the line set ideal 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 various HVAC applications, including:
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 (36,000–48,000 BTU).
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 up to 7000 PSI, far exceeding the pressure required for most air conditioning systems. This ensures safe refrigerant transport and reliable long-term operation.
Multiple Insulation Options for Different HVAC Installations
To meet various installation environments, the insulated copper pipe is available with different insulation materials and thickness options.
Available insulation options include:
White PE insulation
Black rubber insulation
Insulation thickness options:
8 mm
9 mm
10 mm
13 mm
19 mm
25.4 mm
These options allow contractors to select the appropriate insulation for indoor or outdoor installations.
Custom Copper Line Sets for HVAC Projects
Professional HVAC manufacturers provide customization services to meet different project requirements.
Available customization options include:
Custom copper pipe diameters
Different insulation thicknesses
Custom pipe lengths
OEM logo printing on insulation
Private label packaging
Customized copper line sets help distributors and HVAC brands create their own product lines.
![copper pipe kit]( "Copper pipe kit")
Insulated Copepr Pipe
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 |
1/4 + 3/8 Mini split installation kit 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 Mini Split Installation Kit 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 Mini split installation kit used for 54000 BTU and 72000 split air conditioner installation.
3/8 + 7/8 Mini Split Installation Kit 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.
Mini Split Installation Kit 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 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 DABUND Insulated Copper Pipe
DABUND is a professional HVAC manufacturer with extensive experience in producing insulated copper line sets.
Key advantages include:
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
DABUND products are widely exported to North America, Europe, the Middle East, and Southeast Asia, supporting HVAC distributors and contractors worldwide.
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.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. The copper tubing connects the indoor evaporator and outdoor condenser units, allowing refrigerant to circulate efficiently. The insulation layer helps maintain stable refrigerant temperature, prevent condensation, and improve overall energy efficiency.
2.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, which usually range from 36,000 to 48,000 BTU. However, the correct line set size should always follow the specifications provided by the HVAC equipment manufacturer.
3.Why is copper the preferred material for HVAC line sets?
Copper is the preferred material for HVAC refrigerant piping because of its excellent thermal conductivity, durability, and corrosion resistance. Copper tubing can withstand high refrigerant pressure and allows efficient heat transfer between HVAC components. It is also flexible and easy to flare or braze, making installation faster and more reliable.
4.How long does an insulated copper HVAC line set last?
A high-quality insulated copper line set can last 20 to 25 years or more when properly installed and maintained. Copper pipes are highly resistant to corrosion and mechanical damage, while durable insulation protects the pipe from UV exposure, moisture, and environmental factors.
5.Can a 35 ft insulated copper pipe be cut to different lengths?
Yes. A 35 ft copper line set can be easily cut to the required length during HVAC installation. HVAC technicians often adjust the pipe length based on the distance between the indoor and outdoor units. Cutting the pipe to the correct length helps reduce excess tubing and minimize the risk of refrigerant leaks.
6.What type of insulation is used on HVAC copper pipes?
Most insulated copper pipes use closed-cell polyethylene (PE) foam or rubber insulation. This type of insulation provides excellent thermal protection, prevents condensation from forming on the pipe surface, and protects the refrigerant line from UV exposure and moisture. High-quality insulation also improves the energy efficiency of the air conditioning system.
7.Is the insulated copper pipe compatible with modern refrigerants?
Yes. High-quality copper line sets are compatible with modern refrigerants such as R410A, R32, and other HVAC refrigerants. Copper tubing manufactured according to ASTM B280 standards is designed to withstand high operating pressures and ensure safe refrigerant circulation.
8.Can insulated copper pipes be used for both residential and commercial HVAC systems?
Yes. Insulated copper pipes are widely used in both residential and commercial HVAC installations. They are suitable for mini split systems, central air conditioning units, heat pumps, and refrigeration equipment. Their durability and thermal efficiency make them ideal for a wide range of cooling applications.
9.What insulation thickness is best for HVAC copper pipes?
The ideal insulation thickness depends on the installation environment and local climate. Common insulation thickness options include 8 mm, 10 mm, 13 mm, 19 mm, and 25 mm. Thicker insulation is typically recommended for outdoor installations or regions with extreme temperatures to reduce energy loss and protect the refrigerant line.
10.Why choose a professional insulated copper pipe manufacturer?
Choosing a professional HVAC copper pipe manufacturer ensures high product quality, strict manufacturing standards, and reliable performance. Experienced manufacturers provide high-purity copper tubing, durable insulation materials, international certifications, and OEM customization services, making them trusted suppliers for HVAC distributors and contractors worldwide.
