3/4 in × 1/2 in × 75 ft Insulated Copper Tube – HVAC Pre-Insulated Refrigerant Line

3/4 in x 1/2 in 75 ft Insulated Copper Tube for HVAC

This 75 ft insulated copper tube is designed with a 3/4 in suction line and 1/2 in liquid line for HVAC refrigerant piping, mini split air conditioners, ductless AC systems, heat pumps and other air conditioning installations requiring reliable pre-insulated refrigerant lines.

The factory-applied insulation helps reduce heat gain, control condensation and protect the copper tubing during indoor and outdoor installation. With a 75 ft length, this pre-insulated copper line set is suitable for extended refrigerant runs between indoor and outdoor HVAC units.

For HVAC contractors, distributors and wholesalers, Dabund insulated copper tubing provides a practical solution for residential, apartment, rooftop and light commercial air conditioning projects.

Product Overview: Factory-Insulated HVAC Copper Line Set

The 3/4 in x 1/2 in x 75 ft insulated copper tube combines high-quality copper tubing with factory-applied insulation to support stable refrigerant flow and thermal protection. Compared with field-wrapped copper tubing, pre-insulated refrigerant lines help save installation time and improve the consistency of insulation coverage.

The 3/4 in suction line is used for return refrigerant gas, while the 1/2 in liquid line is used for refrigerant feed. This size pairing is commonly selected for larger HVAC systems, depending on the air conditioner manufacturer’s installation requirements.

Key Features of 75 ft 3/4 in x 1/2 in Insulated Copper Tube

• 75 ft length for extended HVAC refrigerant line runs.

• 3/4 in suction line and 1/2 in liquid line configuration.

• Factory-applied insulation for thermal protection and condensation control.

• 99.9% pure copper tubing for reliable HVAC refrigerant transport.

• Suitable for mini split AC, ductless air conditioners and heat pump systems.

• Compatible with common HVAC refrigerants such as R410A and R32.

• UV-resistant and weather-durable insulation jacket for outdoor exposure.

• Black rubber insulation temperature range from -40℃ to 120℃.

• Designed for residential and light commercial HVAC installations.

• OEM printing and custom packaging are available for distributors and brands.

Long 75 ft Length for Flexible HVAC Installation

The 75 ft line length is useful when the indoor evaporator and outdoor condenser are installed at a longer distance. It can be used for larger homes, multi-story buildings, rooftop HVAC layouts and installations where a standard short line set is not enough.

A continuous 75 ft pre-insulated copper tube can help reduce the need for multiple coupling joints, support cleaner routing through walls and ceilings, and lower potential refrigerant leakage points. Final line length must always follow the HVAC equipment manufacturer’s manual.

Factory-Applied Insulation for Thermal Protection and Efficiency

Enhanced Heat Retention and Energy Efficiency

Factory-applied insulation helps maintain stable refrigerant temperatures throughout the line run. This reduces heat gain or heat loss and supports better HVAC cooling and heating performance.

Reduces Condensation and Moisture Issues

Pre-insulated copper tubing minimizes surface condensation on refrigerant lines. This helps protect walls, ceilings, attic spaces and surrounding building materials from dripping water and moisture-related damage.

UV-Resistant and Weather-Durable Jacket

The insulation jacket is designed for indoor and outdoor HVAC line runs. UV resistance and weather durability help protect the tubing from sunlight, rain, temperature changes and normal outdoor exposure.

Premium Copper Construction for HVAC Reliability

99.9% Pure Copper Tubing

The copper tubing is constructed from 99.9% pure copper, providing strong thermal conductivity, corrosion resistance and mechanical strength for HVAC refrigerant piping applications.

Designed for Modern HVAC Refrigerant Systems

The tubing is suitable for high-performance air conditioning and refrigeration systems under normal HVAC working conditions. It is designed to support safe refrigerant flow in mini split, ductless AC and heat pump installations.

HVAC Compatibility and Applications

This 3/4 in x 1/2 in insulated copper tube is suitable for connecting indoor and outdoor units in HVAC systems that require this line size pairing. It is commonly used in residential and light commercial projects where longer refrigerant piping is required.

• Ductless mini split air conditioners.

• Heat pump systems.

• Residential HVAC installations.

• Apartment and multi-story building HVAC projects.

• Light commercial air conditioning systems.

• Extended refrigerant line runs between indoor and outdoor units.

The tubing works with common modern HVAC refrigerants including R410A, R32 and similar refrigerants. Final compatibility should be verified according to the equipment manufacturer’s installation requirements.

99.9% Pure Copper

Black Rubber Insulated Pipe

Plastic Cap Protection

Features of Pipe Insulation Tubing

The insulation tubing uses black rubber material designed for HVAC refrigerant lines. Its closed-cell structure helps reduce heat transfer, control condensation and protect copper tubing during long-term operation.

• Black rubber insulation for pre-insulated copper tubing.

• Temperature range from -40℃ to 120℃.

• Improved moisture condensation control.

• Insulation layer also works as a moisture-resistant protective layer.

• No additional vapor permeation protective layer is required in many standard installations.

• Suitable for indoor and outdoor HVAC refrigerant line protection.

Key Benefits of Insulated Copper Tubing

Simplifies HVAC Installation and Saves Labor

Factory-installed insulation eliminates much of the field wrapping work during installation. This helps reduce installation time, improve appearance and support consistent insulation coverage.

Improved HVAC Energy Efficiency

Insulation helps preserve refrigerant temperatures along the run, supporting stable cooling and heating performance while reducing unnecessary energy loss.

Protection Against Moisture and Structural Damage

Pre-insulated tubing helps reduce condensation and dripping that may otherwise affect nearby walls, ceilings, insulation materials or structural surfaces.

Suitable for Professional and Bulk HVAC Supply

Dabund supports HVAC distributors, wholesalers, contractors and private-label brands with insulated copper tubing, mini split line sets and related HVAC installation products.

Technical Specifications

Installation Tips for Best Results

Plan Line Routing Before Installation

Measure the total distance between indoor and outdoor HVAC components before installation. Plan the route carefully to avoid sharp bends, unnecessary joints and areas that may damage insulation.

Protect Insulation at Wall Penetrations

Use protective sleeves, wall covers or grommets where the tubing passes through walls. This helps prevent insulation abrasion and keeps the installation cleaner.

Secure Long Runs with Support Clips

Use clips, straps or brackets to support long line runs. Proper support helps reduce vibration, sagging and long-term stress on the copper tubing and insulation.

Follow Manufacturer Installation Requirements

Always follow the HVAC equipment manufacturer’s requirements for line size, maximum line length, elevation difference, flare connection and refrigerant charging.

Insulated Copper Tubing Size Options

Recommended Applications by Line Set Size

The 1/2 in x 3/4 in size is typically selected for larger HVAC systems requiring higher refrigerant flow capacity. Final line size must be confirmed by the equipment installation manual.

Why Choose This 75 ft Insulated Copper Tube?

Reliable HVAC Performance and Durable Design

With 99.9% pure copper tubing and factory-applied insulation, this line set is built for long-term HVAC refrigerant piping performance in residential and light commercial applications.

Easy Installation for Professionals and Experienced Installers

The pre-insulated structure and standard sizing help simplify HVAC line runs. It is suitable for HVAC technicians, contractors and experienced installers following proper refrigerant system procedures.

Ideal for Residential and Light Commercial Projects

This 75 ft insulated copper tubing is suitable for homes, apartments, offices and light commercial properties requiring reliable refrigerant tubing over longer distances.

Dabund Factory

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

SGS Certificate

Dabund mini split line set and insulated copper tubing can be made with polypropylene or black rubber insulation with UV resistance, meeting ASTM E84, UL94, ASTM D1056 and ASTM G21 requirements.

Exhibition

Dabund joins HVAC trade shows worldwide to meet customers, present insulated copper tubing products and support face-to-face communication with distributors, contractors and HVAC brands.

FAQ

What does 3/4 in x 1/2 in insulated copper tube mean?

It refers to the outer diameters of the two copper refrigerant tubes. The 3/4 in tube is typically the suction line, and the 1/2 in tube is typically the liquid line.

What is 75 ft insulated copper tubing used for?

It is used to connect indoor and outdoor units in mini split air conditioners, ductless heat pumps and HVAC systems where a longer refrigerant line run is required.

Is this product suitable for outdoor HVAC installations?

Yes. The factory-applied insulation is UV-resistant and weather-durable, making it suitable for exterior refrigerant line runs when installed according to HVAC requirements.

Do I need to add more insulation on site?

In many standard applications, no additional field wrapping is required because the copper tube already includes factory-applied insulation. Always follow local project and equipment requirements.

Will this tubing work with R410A and R32 refrigerants?

Yes. This insulated copper tube supports common modern refrigerants such as R410A and R32, subject to the HVAC equipment manufacturer’s technical requirements.

What is the insulation temperature range?

The black rubber insulation temperature range is from -40℃ to 120℃, making it suitable for many HVAC refrigerant line applications.

Can this 75 ft line set be used for rooftop HVAC installation?

Yes, it can be used for rooftop or long-distance HVAC layouts if the system manufacturer allows the line length and elevation difference. Always verify before installation.

Can I print my logo on the insulation?

Yes. Dabund supports OEM and ODM customization, including logo printing, size marking, length marking and custom packaging for HVAC distributors and private-label brands.

Are you a trading company or manufacturer?

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

Can I get a free sample?

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

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 the delivery time?

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