1/4" x 3/8" x 100 ft Insulated Copper Pipe for HVAC & Air Conditioning Systems

1/4" x 3/8" x 100 ft Insulated Copper Pipe for HVAC Air Conditioning Systems

The DABUND 1/4" x 3/8" x 100 ft insulated copper pipe is a pre-insulated HVAC copper line set designed for mini split air conditioners, heat pumps, refrigeration systems, and air conditioning installations. It provides efficient refrigerant transfer, stable thermal performance, condensation protection, and long-term durability for residential and commercial HVAC applications.

This 100 ft insulated copper pipe includes a 1/4" liquid line and a 3/8" suction line. It is commonly used for 9,000–12,000 BTU mini split air conditioners when the HVAC equipment manufacturer specifies this pipe size and installation length.

Product Overview – 100 ft Pre-Insulated Copper Line Set

This premium HVAC copper line set is engineered to connect indoor and outdoor units efficiently. With factory-applied insulation and flexible copper tubing, it simplifies installation while improving system efficiency and refrigerant line protection.

• Liquid line: 1/4 inch / 6.35 mm

• Suction line: 3/8 inch / 9.52 mm

• Length: 100 ft / approximately 30.5 m

• Structure: twin pre-insulated copper pipes

• Application: HVAC, air conditioning, and refrigeration systems

The 1/4" x 3/8" configuration is a common line set size for small mini split air conditioners, especially 9K–12K BTU systems, depending on the system manufacturer’s installation requirements.

Premium Copper Tubing Built for Performance and Durability

99.9% Pure Copper for Maximum Efficiency

Manufactured with 99.9% pure copper, this insulated copper pipe provides excellent thermal conductivity, stable refrigerant flow, corrosion resistance, and long-term reliability. The copper tubing can comply with ASTM B280 and C12200 standards according to product specification.

High Pressure Resistance for Modern Refrigerants

With a pressure rating range of 2100–7000 PSI according to specification, this copper pipe can support modern refrigerants such as R410A when the pipe size, wall thickness, pressure rating, line length, and HVAC system requirements match.

Advanced Insulation Technology for Energy Efficiency

UV-Resistant and Weatherproof Insulation

The pipe features high-density polyethylene or rubber insulation designed for indoor and outdoor HVAC environments. It helps protect the copper line set from UV exposure, aging, moisture, and temperature fluctuation.

• Temperature range: -40°C to 120°C

• UV-resistant and anti-aging insulation

• Flame-retardant insulation option, including UL94-related requirements according to specification

• Suitable for indoor concealed runs and outdoor exposed installations

Moisture and Condensation Protection

The closed-cell insulation structure helps prevent water penetration, reduce surface condensation, and protect surrounding walls, ceilings, and building materials from moisture damage.

Multi-Layer Insulation Structure

• Outer layer: UV-resistant PE film

• Middle layer: IXPE foam for thermal insulation

• Inner layer: airtight closed-cell structure

This triple-layer design supports stronger insulation performance, better durability, and more stable refrigerant temperature control across long HVAC line runs.

99.9% Pure Copper

White PE Insulated Pipe

Plastic Cap Protection

Pipe Insulation Tubing Features

The pipe insulation tubing is designed for thermal protection, condensation control, moisture resistance, UV protection, and long-term outdoor durability. It helps maintain refrigerant temperature and reduce energy loss during air conditioning operation.

Thermal Insulation Pipe Production

Insulated Pipe Warehouse

Inner Layer Insulated Pipe

Key Benefits of This HVAC Copper Line Set

Energy Saving and Improved Cooling Efficiency

Pre-insulated tubing minimizes unnecessary heat exchange, helping the HVAC system maintain stable refrigerant temperature and operate more efficiently.

Easy Installation to Save Time and Labor

Factory-applied insulation reduces the need for additional wrapping, shortens preparation time, and improves insulation consistency compared with manual field insulation.

Wide Compatibility with HVAC Systems

This insulated copper pipe can be used for mini split air conditioners, heat pumps, central air conditioning systems, and refrigeration applications when the line size and installation length match the equipment requirements.

Long Service Life and Corrosion Resistance

Copper naturally resists corrosion and provides strong durability. With proper installation and suitable operating conditions, high-quality insulated copper pipes can deliver long service life in HVAC systems.

Applications – Where Can This Copper Pipe Be Used?

This insulated copper pipe is ideal for HVAC air conditioning systems that require a 1/4" liquid line and 3/8" suction line.

• Residential air conditioning installations

• Commercial HVAC systems

• Refrigeration systems

• Ductless mini split units

• Heat pump systems

It is especially suitable for 0.75–1 ton HVAC systems, commonly 9K–12K BTU mini split systems, depending on manufacturer installation specifications.

Customization and OEM Manufacturing Options

DABUND supports OEM and ODM services for distributors, wholesalers, contractors, importers, and HVAC brands that need private label insulated copper pipe solutions.

• Custom insulation colors, including black and white

• Logo printing on insulation

• Custom lengths and pipe size combinations

• Custom packaging for distributors and private brands

• OEM and ODM manufacturing support

Insulated Copper Pipe Air Conditioning Size Options

Line Set Size and HVAC Capacity Reference

Why Choose DABUND as Your Copper Pipe Supplier?

DABUND provides a reliable one-stop solution for HVAC line sets, insulated copper pipes, mini split line sets, aluminum pipes, and HVAC parts for global contractors, distributors, wholesalers, and OEM brands.

• Over 15 years of HVAC manufacturing experience

• In-house insulation production

• Strict quality control standards

• Global export capability

• Competitive factory pricing

DABUND Factory

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

SGS Certificate

DABUND mini split line set insulation can be made of polypropylene or black rubber with UV resistance and can meet ASTM E84, UL94, ASTM D1056, and ASTM G21 standards according to product specification.

Exhibition

DABUND joins HVAC exhibitions worldwide to help customers evaluate mini split line sets, insulated copper pipes, HVAC air conditioning line sets, and HVAC parts face to face.

FAQ

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

This size is commonly used for 9,000–12,000 BTU mini split air conditioners. It connects the indoor and outdoor units and allows refrigerant to circulate efficiently.

Why is insulation important for copper pipes in HVAC systems?

Insulation helps prevent energy loss, reduce condensation, protect copper pipes from environmental damage, improve HVAC efficiency, and extend system service life.

Is this copper pipe compatible with R410A refrigerant?

Yes. This insulated copper pipe can support high-pressure refrigerants such as R410A when the pipe size, wall thickness, pressure rating, line length, and system requirements match.

Can I use this line set for both residential and commercial HVAC systems?

Yes. It can be used for residential homes, commercial buildings, and refrigeration systems when the HVAC equipment requires a 1/4" x 3/8" line set.

What makes pre-insulated copper pipes better than standard pipes?

Pre-insulated pipes save installation time, reduce labor cost, improve insulation consistency, reduce condensation risk, and provide cleaner installation compared with manually insulated copper pipes.

Can I customize the insulated copper pipe for my brand?

Yes. DABUND supports OEM services, including custom branding, insulation color, logo printing, pipe markings, packaging, and custom line set lengths.

How long does an insulated copper pipe last?

With proper installation and suitable operating conditions, high-quality insulated copper pipes can provide long service life because of copper’s corrosion resistance and durable insulation protection.

Is this product suitable for outdoor installation?

Yes. The UV-resistant insulation is designed for outdoor use and helps protect the copper line set against sunlight, rain, moisture, and temperature changes.

What standards can this insulated copper pipe meet?

The copper tubing can meet ASTM B280 and C12200 requirements according to product specification. The insulation can meet ASTM E84, UL94, ASTM D1056, and ASTM G21 according to selected material.

Who should buy this 100 ft 1/4" x 3/8" insulated copper pipe?

It is suitable for HVAC contractors, mini split installers, distributors, wholesalers, importers, refrigeration project buyers, and private label HVAC brands.