1/4″ × 3/8″ × 82 ft Insulated Copper Pipe for Split AC – High-Performance HVAC Refrigerant Line

1/4" x 3/8" x 82 ft Insulated Copper Pipe for Split AC

The 1/4" x 3/8" x 82 ft insulated copper pipe is a high-performance HVAC refrigerant line designed for split air conditioners, mini split systems, heat pumps and ductless HVAC installations.

This pre-insulated copper line set includes a 1/4" liquid line and a 3/8" suction line with factory-applied white PE insulation. It helps improve energy efficiency, reduce condensation, protect copper tubing and simplify long HVAC line runs.

Dabund supplies insulated copper pipe, AC line sets, mini split line sets and HVAC refrigerant tubing for contractors, installers, wholesalers, distributors and OEM private-label buyers.

Product Overview: 82 ft Insulated HVAC Copper Line Set

This 82 ft insulated copper pipe combines durable copper tubing with factory-applied insulation to provide a ready-to-install refrigerant line for extended HVAC runs.

The 82 ft length is suitable for installations where the indoor evaporator and outdoor condenser are farther apart, such as multi-story houses, apartments, garages, balconies and retrofit projects.

Key Features of 1/4" x 3/8" x 82 ft Insulated Copper Pipe

• 82 ft / 25 m insulated copper pipe for split AC and mini split installation.

• 1/4" liquid line and 3/8" suction line for compatible HVAC systems.

• 99.9% pure seamless copper tubing for stable refrigerant flow.

• Factory-applied white PE insulation helps reduce heat gain and heat loss.

• Moisture-resistant insulation helps prevent condensation on line surfaces.

• UV and weather-resistant outer cover supports indoor and outdoor line runs.

• Flexible and easy to route during long refrigerant line installation.

• Suitable for R410A, R32, R22 and similar HVAC refrigerants when installed correctly.

• OEM logo printing, insulation thickness, length and packaging customization are available.

Technical Specifications

Premium Copper Refrigerant Tubing

99.9% Pure Seamless Copper

The copper tubing is constructed from 99.9% pure seamless copper. It provides excellent thermal conductivity, corrosion resistance and pressure performance for HVAC refrigerant transfer.

Uniform Wall Thickness

Uniform copper wall thickness supports consistent pressure handling and stable refrigerant circulation during cooling and heating operation.

1/4" x 3/8" Line Size

The 1/4" x 3/8" line size is commonly used for smaller mini split and split AC systems. Final line sizing should always follow the HVAC equipment manufacturer’s installation manual.

Factory-Applied Insulation Features

• High-density insulation jacket reduces thermal loss.

• Moisture-resistant foam helps prevent condensation.

• UV and weather-resistant outer cover supports outdoor use.

• Factory-applied insulation saves installation time.

• Flexible insulation supports easier routing around walls, corners and brackets.

• Helps maintain refrigerant temperature stability across long line runs.

Pre-insulated copper lines help maintain refrigerant temperature and protect the line set from environmental exposure, moisture and installation damage.

99.9% Pure Copper

White PE Insulated Pipe

Plastic Cap Protection

Pipe Insulation Tubing Structure

The white PE insulated copper pipe uses a durable multilayer insulation structure to support thermal protection, condensation control and long-term HVAC service in indoor and outdoor environments.

Embossed White PE Outer Layer

The outer layer helps resist wear, aging and sunlight exposure while protecting the insulation from normal installation handling.

Closed-Cell Foam Insulation

The closed-cell foam layer helps reduce heat transfer and moisture absorption, supporting stable refrigerant temperature during operation.

Inner Protective Layer

The inner layer helps protect the copper pipe surface and maintain insulation performance along the full 82 ft line run.

Thermal Insulation Pipe Production

Insulated Pipe Warehouse

Inner Layer Insulated Pipe

Key Benefits of This Insulated Copper Pipe

Enhanced Energy Efficiency

The insulated design reduces heat exchange with ambient air, helping the HVAC system maintain better cooling and heating performance over longer line runs.

Improved Moisture Protection

Pre-insulation helps prevent condensation buildup on line surfaces, reducing potential water damage, corrosion risk and mold-related issues around building materials.

Easy Installation and Labor Savings

Factory-applied insulation eliminates the need for additional wrapping in most standard installations, helping reduce labor time and installation cost.

Long Line Run Flexibility

The 82 ft length gives installers more flexibility for projects where the indoor unit and outdoor condenser require a longer refrigerant line route.

Applications: Where This Copper Pipe Is Used

• Split air conditioner installations.

• Mini split and ductless HVAC systems.

• Heat pump refrigerant lines.

• Residential and light commercial HVAC setups.

• Retrofit and replacement line projects.

• Longer indoor-to-outdoor unit connections.

The 1/4" x 3/8" insulated copper pipe is commonly used by HVAC contractors, technicians and experienced installers who need stable refrigerant flow and reliable insulation performance.

HVAC Installation Best Practices

1. Measure the total line run before making cuts.

2. Confirm the line size and maximum allowable length with the AC manufacturer.

3. Avoid sharp bends or kinks that restrict refrigerant flow.

4. Ensure continuous insulation coverage for thermal integrity.

5. Use proper cutting, deburring, flaring and sealing tools for leak-resistant joints.

6. Support long line runs with suitable clamps, brackets or line set covers.

Following these practices helps enhance HVAC system efficiency, reduce leakage risk and minimize future maintenance.

AC Line Set Size Options

Recommended Applications by AC Capacity

The 1/4" x 3/8" AC line set is commonly used for 0.75 ton to 1.0 ton mini split systems and many 9,000 BTU to 12,000 BTU applications. Final sizing should always follow the AC equipment manufacturer’s specifications.

Why Choose AC Line Set from Dabund Pipe?

Manufacturer Since 2008

Dabund Pipe has produced AC line sets, insulated copper pipe, mini split line sets, aluminum pipe and HVAC parts since 2008, supporting global HVAC customers with manufacturing and export experience.

Individual Pre-Insulated Rolls

Individual pre-insulated rolls are designed to fit ductless mini splits, VRF systems, heat pumps and unitary HVAC system installations.

Quality Products with Competitive Pricing

Dabund supports HVAC wholesalers, contractors, installers and private-label buyers with stable supply, competitive pricing and professional service.

OEM and Private-Label Support

Dabund can customize length, insulation thickness, insulation color, printed logo, product marking and packaging for distributors and brand owners.

Dabund Factory

Dabund produces insulated copper pipe, mini split line set, aluminum pipe and HVAC parts for global customers.

SGS Certificate

Mini split line set insulation can be made of polypropylene or black rubber with UV resistance, meeting ASTM E84, UL94, ASTM D1056 and ASTM G21 requirements.

Exhibition

Dabund joins HVAC exhibitions worldwide to present mini split line set and AC line set products to customers face to face.

FAQ

What is 1/4" x 3/8" x 82 ft insulated copper pipe used for?

It is used as a pre-insulated refrigerant line for split air conditioners, mini split systems, ductless HVAC systems and heat pump installations.

What does 1/4" x 3/8" mean?

It refers to the outer diameters of the two copper refrigerant pipes. The 1/4" line is commonly the liquid line, and the 3/8" line is commonly the suction line.

How long is 82 ft in meters?

82 ft is approximately 25 meters, making it suitable for longer indoor-to-outdoor unit distances in compatible HVAC installations.

What AC capacity is 1/4" x 3/8" commonly used for?

The 1/4" x 3/8" line set is commonly used for 0.75 ton to 1.0 ton mini split systems and many 9,000 BTU to 12,000 BTU applications.

Is this 82 ft insulated copper pipe compatible with all refrigerants?

It is compatible with common HVAC refrigerants such as R410A, R32 and R22 when installed according to system specifications. Always check equipment requirements before installation.

Can the pipe be cut to custom lengths?

Yes. The copper tubing can be trimmed to meet required installation lengths. After cutting, proper deburring, flaring and sealing are required for reliable system operation.

Does this pipe need additional insulation?

In most standard HVAC installations, no additional insulation is required because the factory-applied insulation is designed to meet common thermal protection needs.

Is this insulated copper pipe suitable for outdoor use?

Yes. The UV and weather-resistant insulation is suitable for many outdoor refrigerant line runs when installed correctly and protected according to project requirements.

Can Dabund provide other line set sizes?

Yes. Dabund can provide multiple AC line set sizes and lengths, including 15 m, 20 m, 25 m, 30 m and 50 m, with different insulation thickness options.

Are you a trading company or manufacturer?

Dabund is a manufacturer of AC line sets, insulated copper pipe, mini split line sets, aluminum pipe and HVAC parts.

Can I get a free sample?

Yes. Dabund can provide qualified customers with 3 pieces of free samples. Express cost may need to be covered by the buyer. You can request samples through the free sample page.

Can I print my logo?

Yes. Dabund accepts OEM and ODM orders, including logo printing, brand marking, size printing, meter marking and customized packaging.

What payment terms are available?

Payment terms may include T/T, L/C at sight, credit card and other agreed payment methods depending on order details.

What delivery terms can you offer?

Dabund can offer common international trade terms such as EXW, FOB, CFR and CIF.

How long is your delivery time?

Normal delivery time is usually 15 to 20 days. For urgent orders, production and shipment can be arranged according to factory schedule.