35 Ft 1/4" x 3/8" Insulated Copper Tube for Mini Split & HVAC Systems

Looking for a reliable, easy-to-install HVAC line set? This 35 ft 1/4" x 3/8" insulated copper tube is designed to deliver efficient cooling performance while simplifying installation. Ideal for mini split air conditioners, this pre-insulated copper pipe ensures durability, energy efficiency, and professional results.

Product Overview – 35 ft Pre-Insulated Copper Line Set

This HVAC insulated copper tube is a complete installation solution, designed to connect indoor and outdoor units efficiently.

• Pipe Size: 1/4" (liquid line) + 3/8" (suction line)

• Length: 35 ft (10.6 meters)

• Material: 99.9% pure copper

• Structure: Twin insulated copper pipes

• Application: Mini split air conditioning & HVAC systems

It often comes as a complete kit including communication wire, drain hose, and wall sleeve, making installation faster and easier.

High-Quality Copper Tubing – Built to Last

99.9% Pure Copper for Superior Performance

This copper tube is made from high-purity copper that ensures excellent heat transfer and long-term reliability. It meets ASTM B280 and C12200 standards, making it suitable for professional HVAC applications.

Pre-Flared Ends for Easy Installation

Both ends of the copper pipe are pre-flared with nuts, saving installers time and ensuring a tight, leak-free connection.

Advanced Insulation for Maximum Efficiency

UV-Resistant & Weatherproof Materials

Available in white PE or black rubber insulation, this line set is designed to withstand harsh outdoor environments.

• UV-resistant and anti-aging

• Flame-retardant (UL94 compliant)

• Meets ASTM E84 fire standards

Excellent Thermal Insulation Performance

The closed-cell insulation structure prevents heat loss and maintains stable refrigerant temperature, even in extreme weather conditions.

Moisture & Condensation Protection

The insulation acts as both a thermal barrier and moisture-proof layer, preventing condensation and protecting surrounding structures.

99.9% Pure Copper

Black Rubber Insulated Pipe

Flaring

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.

Key Benefits of 35 ft Insulated Copper Tube

Save Installation Time & Labor Costs

Pre-insulated and pre-flared design eliminates extra work, allowing faster installation on-site.

Improve HVAC System Efficiency

Efficient insulation reduces energy loss, helping your system operate at peak performance.

Durable & Corrosion Resistant

Copper naturally resists corrosion, ensuring long service life even in humid or outdoor environments.

Complete Installation Kit Available

Optional accessories include:

• Communication cable

• Drain hose

• Wall pipe cover

Providing a full HVAC installation solution.

Applications – Ideal for Mini Split Air Conditioners

This 1/4" + 3/8" insulated copper tube is widely used for:

• 9000 BTU mini split systems

• 12000 BTU air conditioners

• Residential HVAC installations

• Small commercial cooling systems

It is typically suitable for 0.75 ton to 1.0 ton HVAC systems.

Customization & OEM Services

Looking to build your HVAC brand? We offer:

• Custom insulation color (black / white)

• Logo printing on insulation

• Custom lengths and packaging

• OEM & ODM manufacturing

Perfect for wholesalers, distributors, and contractors.

Insulated Copper Tube

1/4 + 3/8 Insulated copper tube used for 0.75TON - 1.0TON mini split air conditioner.

1/4 + 1/2 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 Mini split air conditioner 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 tube 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 Insukated copper tube used for 54000 BTU and 72000 split air conditioner installation.

3/8 + 7/8 Mini split air conditioner 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.

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 tube used for 54K and 72K split air conditioner installation.

3/8 + 7/8 Mini split air conditioner kit apply for 72K - 96K ductless mini split air conditioner.

Why Choose DABUND as Your HVAC Copper Tube Supplier?

• Over 14 years of manufacturing experience

• Monthly capacity up to 1,000,000 pcs

• Fast sample delivery (within 5 days)

• Strict quality control & SGS-certified products

• Global export support

DABUND provides a one-stop HVAC solution for copper line sets and accessories.

DABUND FACTORY

We produce Insulated Copper Pipe, Mini Split Line Set and Aluminum Pipe and HVAC Parts

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

Exhibition

We join the exhibitions all over the word, just to facilitate customers to experience our mini split line set face to face.

FAQ

1.What is a 35 ft 1/4" x 3/8" insulated copper tube used for?

This size is commonly used for mini split air conditioners between 9000 and 12000 BTU. It connects the indoor and outdoor units and allows refrigerant to flow efficiently.

2.Is this copper line set suitable for DIY installation?

Yes, the pre-flared ends and pre-insulated design make it easier for both professionals and experienced DIY users to install.

3.What type of insulation is used in this copper pipe?

The product typically uses white PE or black rubber insulation, both of which are UV-resistant, flame-retardant, and suitable for indoor and outdoor use.

4.Does this insulated copper tube support modern refrigerants like R410A?

Yes, it meets ASTM standards and can handle high-pressure refrigerants such as R410A, ensuring safe and efficient operation.

5.How long does an insulated copper line set last?

With proper installation, it can last 15–20 years or more due to its corrosion resistance and durable insulation materials.

6.Can I customize the copper pipe for my brand or project?

Yes, OEM and ODM services are available, including custom lengths, insulation thickness, colors, and logo printing.

7.Is this copper pipe suitable for outdoor installation?

Absolutely. The UV-resistant insulation protects the pipe from sunlight, rain, and extreme temperatures.

8. What accessories are included in the installation kit?

Depending on the configuration, it may include communication wires, drain hoses, wall sleeves, and protective covers for a complete installation solution.