1/4" x 3/8" x 164 ft Insulated Copper Pipe for HVAC & Refrigeration Systems

The 1/4" x 3/8" x 164 ft insulated copper pipe is designed for professional HVAC and refrigeration installations. This pre-insulated copper line set is widely used in mini split air conditioners, heat pumps, and central air conditioning systems.

Manufactured with 99.9% pure copper, the pipe meets ASTM B280 and C12200 standards, ensuring excellent durability, corrosion resistance, and high thermal conductivity. The long 164 ft continuous coil allows installers to complete large projects with fewer joints, reducing the risk of refrigerant leakage and improving installation efficiency.

Key Specifications of the 1/4" x 3/8" x 164 ft Copper Line Set

This insulated copper pipe is manufactured to meet international HVAC standards and provides reliable performance in demanding environments.

Product Specifications

• Copper Tube Size: 1/4" + 3/8" (6.35mm + 9.52mm)

• Length: 164 ft (50 m)

• Material: 99.9% Pure Copper

• Insulation Material: UV-Resistant Polypropylene / Black Rubber Foam

• Working Temperature: -40°C to 120°C

• Pressure Rating: 2100 – 7000 PSI

• Compliance: ASTM B280, ASTM E84, UL94, ASTM D1056, ASTM G21

These specifications ensure the copper line set delivers long service life, excellent thermal insulation, and superior pressure resistance.

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Premium 99.9% Pure Copper for Reliable Refrigerant Flow

The copper tubing is manufactured using high-purity 99.9% copper, which provides outstanding thermal conductivity and corrosion resistance. This material ensures smooth refrigerant circulation between the indoor and outdoor units, improving overall HVAC system efficiency.

Copper is the preferred material for HVAC refrigeration lines because it offers:

• Excellent heat transfer performance

• High mechanical strength

• Long lifespan

• Superior resistance to pressure and corrosion

These advantages make insulated copper pipes the industry standard for air conditioning installations worldwide.

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High-Performance Insulation for Energy Efficiency

The insulated copper pipe features high-density UV-resistant insulation, designed to protect the refrigerant lines from environmental damage and energy loss.

Key insulation benefits include:

• Prevents condensation and moisture buildup

• Protects pipes from UV exposure

• Reduces heat loss and improves energy efficiency

• Maintains stable refrigerant temperature

The insulation meets ASTM E84 and UL94 fire resistance standards, ensuring safe operation in both residential and commercial HVAC installations.

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Wide Applications for HVAC and Refrigeration Systems

The 1/4" x 3/8" insulated copper line set is suitable for a variety of HVAC systems, including:

• Ductless mini split air conditioners

• Heat pump systems

• Central air conditioning units

• VRF / VRV systems

• Commercial refrigeration equipment

This line set size is commonly used for 9,000–12,000 BTU mini split air conditioners, making it ideal for residential and light commercial installations.

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High Pressure Resistance for Modern Refrigerants

Modern air conditioning systems often use high-pressure refrigerants such as R410A.

This insulated copper pipe features a pressure rating of 2100–7000 PSI, significantly higher than the typical operating pressure required for HVAC systems. This ensures safe and reliable operation even in demanding cooling environments.

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.

Flexible Coil Design for Easy Installation

The 164-ft coil design allows HVAC technicians to easily cut the copper tubing to the desired length during installation.

Benefits include:

• Reduced pipe joints and connectors

• Faster installation process

• Lower risk of refrigerant leaks

• Improved system reliability

This flexibility makes it suitable for long-distance installations and large HVAC projects.

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Customizable HVAC Copper Line Sets

As a professional HVAC manufacturer, we provide customization options to meet different project requirements.

Available customization options include:

• Copper pipe sizes: 1/4", 3/8", 1/2", 5/8", 3/4", 7/8", 1-1/8"

• Insulation thickness options

• Custom lengths (15m, 20m, 25m, 30m, 50m)

• OEM branding and private label printing

Customers can also print company name, pipe size, or length markings directly on the insulation.

Insulated Copper Pipe

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/25.4mm	M1/B1

1/4 + 3/8 Mini split line set 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 pipe 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 Insulated copper line set 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 pipe used for 54000 BTU and 72000 split air conditioner installation.

3/8 + 7/8 Insulated copper piping 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 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 manufacturer of HVAC copper line sets with many years of production and export experience.

Key advantages include:

• Over 15 years of HVAC manufacturing experience

• Large-scale production capacity

• Strict quality inspection and testing

• Competitive factory pricing

• Global export to many countries

Our insulated copper pipes are widely used by HVAC distributors, contractors, and installation companies worldwide.

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.Q:What is a 1/4" x 3/8" insulated copper pipe used for?

A:A 1/4" x 3/8" insulated copper pipe is commonly used as a refrigerant line set for mini split air conditioners, heat pumps, and HVAC refrigeration systems. The two copper tubes allow refrigerant to circulate between the indoor evaporator unit and the outdoor condenser unit. Proper insulation helps prevent energy loss, condensation, and temperature fluctuations, ensuring efficient cooling performance.

2.Q:What size mini split system uses a 1/4" x 3/8" line set?

A 1/4" liquid line and 3/8" suction line is typically used for 9,000 BTU to 12,000 BTU mini split air conditioners. However, the exact size required depends on the specifications of the HVAC equipment manufacturer. Always check the installation manual of your air conditioner or heat pump before selecting a refrigerant line set.

3.Q:Why are HVAC line sets made from copper instead of aluminum?

A:Copper is widely used in HVAC line sets because it offers superior performance compared to aluminum. Copper provides excellent thermal conductivity, corrosion resistance, flexibility, and pressure tolerance, making it ideal for transporting refrigerant safely and efficiently. In addition, copper pipes are easier to flare, braze, and install, which is why most professional HVAC installers prefer copper refrigeration tubing.

4.Q:How long can an insulated copper HVAC line set last?

A:high-quality insulated copper line set can typically last 20 to 25 years or longer when properly installed and maintained. Copper is highly resistant to corrosion and can withstand high pressure refrigerants such as R410A. Using durable insulation also protects the pipe from UV exposure, moisture, and environmental damage, extending the lifespan of the HVAC system.

5.Q:Can a 164 ft copper line set be cut to custom lengths?

A:164 ft insulated copper pipe coil is designed to be flexible and can easily be cut to the required length during installation. HVAC technicians usually cut the pipe to match the distance between the indoor and outdoor units. This reduces the number of joints and connectors, helping minimize the risk of refrigerant leaks.

6.Q:What type of insulation is used on HVAC copper pipes?

A:Most HVAC insulated copper pipes use high-density closed-cell foam insulation. This type of insulation provides excellent thermal protection, prevents condensation, and improves the overall energy efficiency of the air conditioning system. High-quality insulation also offers UV resistance, fire resistance, and temperature stability in environments ranging from -40°C to 120°C.

7.Is the insulated copper pipe compatible with modern refrigerants?

Yes. High-quality copper line sets are designed to work with modern refrigerants such as R410A, R32, and other HVAC refrigerants. The copper tubing is manufactured to meet standards like ASTM B280, ensuring it can withstand high operating pressures and maintain safe refrigerant flow.

8.Do HVAC line sets come pre-insulated?

Many modern HVAC copper line sets come pre-insulated from the factory. Pre-insulated line sets save installation time and ensure consistent insulation thickness along the entire pipe. This improves energy efficiency, reduces labor costs, and helps HVAC technicians complete installations more quickly.

9.Can insulated copper pipes be used for both residential and commercial HVAC systems?

Yes. Insulated copper pipes are suitable for a wide range of applications, including residential air conditioning, commercial refrigeration systems, heat pumps, and VRF/VRV systems. The durable copper tubing and high-performance insulation make them reliable for both small residential units and larger commercial cooling systems.

10.Why choose a professional HVAC line set manufacturer?

Choosing a professional manufacturer ensures that the HVAC copper line sets meet international standards, offer consistent quality, and deliver reliable performance. Experienced manufacturers provide high-purity copper tubing, durable insulation, strict quality control, and OEM customization services, making them ideal partners for HVAC distributors and contractors worldwide.