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

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 from Dabund is a professional pre-insulated HVAC copper line set designed for mini split air conditioners, heat pumps, central air conditioning systems, VRF/VRV systems, and refrigeration applications. The 164 ft continuous coil helps installers complete long-distance projects with fewer joints, reducing potential leak points and improving installation efficiency.

Manufactured with 99.9% pure copper that meets ASTM B280 and C12200 standards, this insulated copper pipe provides excellent thermal conductivity, corrosion resistance, high pressure strength, and long service life for HVAC refrigerant flow.

Product Overview – 164 ft Pre-Insulated Copper Line Set

This 1/4" x 3/8" insulated copper line set includes a 1/4" liquid line and a 3/8" suction line. It is commonly used for small-capacity mini split systems, especially 9,000–12,000 BTU or 0.75–1.0 ton HVAC installations.

• Pipe size: 1/4" + 3/8" / 6.35mm + 9.52mm

• Length: 164 ft / 50 m continuous coil

• Material: 99.9% pure copper tubing

• Insulation: UV-resistant polypropylene or black rubber foam

• Working temperature: -40°C to 120°C

• Pressure rating: 2100–7000 PSI

• Application: mini split AC, heat pump, HVAC refrigeration, central air conditioning, VRF/VRV systems

The long coil design gives contractors more installation flexibility and supports large residential, apartment, office, and light commercial HVAC projects.

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

Premium 99.9% Pure Copper for Reliable Refrigerant Flow

The copper tubing is manufactured using high-purity 99.9% copper, providing outstanding thermal conductivity and corrosion resistance. Smooth refrigerant circulation between indoor and outdoor units helps improve overall HVAC efficiency.

• Excellent heat transfer performance

• High mechanical strength for refrigerant pressure

• Long service life in HVAC environments

• Superior resistance to pressure and corrosion

• Easy cutting, routing, flaring, and installation

Copper remains the preferred material for HVAC refrigeration lines because it combines thermal performance, pressure resistance, flexibility, and long-term durability.

High-Performance Insulation for Energy Efficiency

The insulated copper pipe uses high-density UV-resistant insulation to protect refrigerant lines from energy loss, condensation, moisture, and environmental damage. This improves HVAC efficiency and helps maintain stable refrigerant temperature.

• Prevents condensation and moisture buildup

• Protects copper pipes from UV exposure

• Reduces heat gain and heat loss

• Maintains stable refrigerant temperature

• Supports indoor and outdoor HVAC installation

The insulation can meet ASTM E84 and UL94 fire resistance standards, supporting safe operation in residential and commercial HVAC installations.

Wide Applications for HVAC and Refrigeration Systems

The 1/4" x 3/8" insulated copper line set is suitable for a wide range of HVAC and refrigeration applications where the equipment requires this pipe size.

• Ductless mini split air conditioners

• Heat pump systems

• Central air conditioning units

• VRF / VRV air conditioning systems

• Commercial refrigeration equipment

• Residential and light commercial HVAC installations

• Long-distance HVAC refrigerant line projects

This size is commonly used for 9,000–12,000 BTU mini split air conditioners. Final line set selection should always follow the HVAC equipment manufacturer’s installation manual.

High Pressure Resistance for Modern Refrigerants

Modern air conditioning systems often use high-pressure refrigerants such as R410A and R32. This insulated copper pipe features a pressure rating of 2100–7000 PSI, supporting reliable performance under demanding cooling and heating conditions.

The high pressure rating helps ensure safe refrigerant flow, stable system operation, and long-term reliability when installed according to HVAC standards and local codes.

99.9% Pure Copper

Black Rubber Insulated Pipe

Plastic Cap Protection

Features of Black Rubber Pipe Insulation Tubing

Black rubber insulation provides strong moisture condensation control. The insulation material works as both a thermal insulation layer and a moisture-proof layer, helping protect refrigerant lines from sweating and temperature loss.

• Material: black rubber insulation

• Temperature range: -40°C to 120°C

• Moisture and condensation resistance

• Thermal insulation and vapor barrier function

• Suitable for mini split, heat pump, and refrigeration line applications

Flexible 164 ft Coil Design for Easy Installation

The 164 ft coil design allows HVAC technicians to cut the copper tubing to the required length during installation. This helps reduce unnecessary connectors, improve routing flexibility, and support large HVAC projects with fewer joints.

• Reduced pipe joints and connectors

• Faster installation process

• Lower risk of refrigerant leaks when installed correctly

• Improved system reliability

• Suitable for long-distance installations and large HVAC projects

Customizable HVAC Copper Line Sets

Dabund provides customization options for different HVAC project requirements, wholesale markets, OEM buyers, and private-label brands.

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

• Custom lengths: 15m, 20m, 25m, 30m, 50m

• Insulation thickness options: 8mm, 9mm, 10mm, 13mm, 19mm, 25.4mm

• White PE or black rubber insulation options

• OEM branding and private label printing

• Company name, pipe size, and length markings on insulation

Available Insulated Copper Pipe Sizes

Insulated Copper Pipe Size Guide

Why Choose Dabund Insulated Copper Pipe?

Dabund is a professional manufacturer of HVAC copper line sets with many years of production and export experience. Its insulated copper pipes are used by HVAC distributors, contractors, installers, and refrigeration companies worldwide.

• More than 15 years of HVAC manufacturing experience

• Large-scale production capacity

• Strict quality inspection and testing

• Competitive factory pricing

• Global export experience

• OEM and ODM customization support

Dabund supplies insulated copper pipes, mini split line sets, aluminum pipes, air conditioner installation kits, and HVAC parts for global B2B buyers.

Dabund Factory

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

SGS Certificate

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

Exhibition and Global Market Experience

Dabund joins international exhibitions to help customers inspect insulated copper pipes, mini split line sets, and HVAC parts face to face.

FAQ About 1/4" x 3/8" x 164 ft Insulated Copper Pipe

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

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. It connects the indoor evaporator unit and outdoor condenser unit while helping prevent energy loss and condensation.

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. Always confirm the required line size with the HVAC equipment manufacturer’s installation manual.

Why are HVAC line sets made from copper instead of aluminum?

Copper is widely used in HVAC line sets because it provides excellent thermal conductivity, corrosion resistance, flexibility, pressure tolerance, and reliable flaring or brazing performance. These properties make copper suitable for professional refrigerant line installations.

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. Service life depends on installation quality, insulation protection, environment, and HVAC system maintenance.

Can a 164 ft copper line set be cut to custom lengths?

Yes. The 164 ft insulated copper pipe coil can be cut to the required length during installation. Proper cutting, deburring, flaring, sealing, vacuuming, and pressure testing are required after cutting.

What type of insulation is used on HVAC copper pipes?

Most HVAC insulated copper pipes use high-density closed-cell foam insulation, polypropylene insulation, or black rubber insulation. These materials provide thermal protection, condensation resistance, UV resistance, fire resistance, and temperature stability.

Is the insulated copper pipe compatible with modern refrigerants?

Yes. High-quality copper line sets can work with modern refrigerants such as R410A, R32, and other HVAC refrigerants when the equipment specifications and local installation codes are followed.

Do HVAC line sets come pre-insulated?

Yes. Many HVAC copper line sets come pre-insulated from the factory. Pre-insulated line sets save installation time, ensure consistent insulation thickness, improve energy efficiency, and reduce labor costs.

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

Yes. Insulated copper pipes are suitable for residential air conditioning, commercial refrigeration systems, heat pumps, VRF/VRV systems, and light commercial HVAC projects.

Why choose a professional HVAC line set manufacturer?

A professional HVAC line set manufacturer can provide consistent copper quality, durable insulation, strict quality control, OEM customization, export packaging, and stable supply for distributors and contractors.

Can Dabund customize the pipe length or insulation printing?

Yes. Dabund supports custom pipe length, copper size, insulation material, insulation thickness, logo printing, company name printing, pipe size marking, and private label packaging.

Can I get samples before bulk ordering?

Yes. Dabund can provide samples for evaluation. Buyers usually need to cover the express shipping cost.