50 ft 1/4" x 3/8" Insulated Copper Tube for Mini Split & HVAC Systems

This 50 ft 1/4" x 3/8" insulated copper tube is designed for mini split air conditioners, heat pumps, and HVAC systems. Made from high-purity copper with factory-applied insulation, it ensures efficient refrigerant transfer, reduced energy loss, and long-lasting performance.

The insulated copper tube is twin already. So buy it now.

Product Overview – 50 ft Pre-Insulated HVAC Copper Line Set

This HVAC copper tubing set includes a 1/4" liquid line and 3/8" suction line, pre-insulated for easy installation and reliable performance.

• Length: 50 ft (15.24 m)

• Material: 99.9% pure copper

• Insulation: UV-resistant PE / polypropylene foam

• Application: Mini split AC, heat pump, ductless HVAC

It is one of the most commonly used configurations for residential HVAC installations.

Key Features of 1/4" x 3/8" Insulated Copper Tube

99.9% Pure Copper for High Thermal Efficiency

Manufactured with ASTM B280 & C12200 compliant copper, ensuring superior thermal conductivity, corrosion resistance, and long service life.

High Pressure Rating for Modern Refrigerants

With a pressure rating of 2100–7000 PSI, this copper tubing is compatible with refrigerants such as R410A and R32, ensuring safe and efficient operation.

Factory-Applied Insulation for Energy Savings

Pre-insulated tubing minimizes heat exchange, improves cooling efficiency, and reduces energy consumption.

UV-Resistant & Flame-Retardant Insulation

The insulation meets multiple international standards including ASTM E84 and UL94, providing protection against fire, UV exposure, and environmental damage.

Technical Specifications

Copper Tube Dimensions

• Liquid Line: 1/4 inch (6.35 mm)

• Suction Line: 3/8 inch (9.52 mm)

Insulation & Temperature Range

• Insulation Material: Polypropylene / PE Foam

• Working Temperature: -40°C to 120°C

Compliance Standards

• ASTM B280 (Copper tubing)

• ASTM E84 (Fire resistance)

• UL94 (Flame retardant)

• ASTM D1056 / G21

These standards ensure high safety, durability, and HVAC compatibility.

Applications – Ideal for Residential HVAC Systems

This insulated copper tube is widely used in:

• Mini split air conditioners

• Heat pump systems

• Ductless HVAC installations

• Residential cooling systems

It is typically suitable for 0.75–1 ton (9,000–12,000 BTU) air conditioning systems.

99.9% Pure Copper

White PE Insulated Pipe

Plastic Cap

Features of pipe insulation tubing:

Machines for the production of thermal insulation pipes

warehouse for insulation pipes

Inner Layer Insulated Pipe

Benefits of Pre-Insulated Copper Tubing

Improved Energy Efficiency

Maintains refrigerant temperature and enhances system performance.

Condensation Prevention

Prevents moisture buildup, protecting walls and structures.

Faster Installation

Pre-insulated design reduces labor time and installation complexity.

Long-Term Durability

Copper’s corrosion resistance combined with durable insulation ensures long service life.

OEM & Customization Services

We support flexible OEM/ODM solutions:

• Custom lengths (1m–50m or more)

• Insulation thickness & material options

• Logo printing on insulation

• Bulk packaging for distributors

Insulated Copper Tube

1/4 + 3/8 AC line set used for 0.75TON - 1.0TON mini split air conditioner.

1/4 + 1/2 Mini split line set used for 1.5TON - 2.0TON mini split air conditioning.

1/4 + 5/8 Copper line set 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 pipe 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 tube used for 54000 BTU and 72000 split air conditioner installation.

3/8 + 7/8 Insulated copper pipe 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 tube used for 54K and 72K split air conditioner installation.

3/8 + 7/8 Insulated Copper Pipe Piping apply for 72K - 96K ductless mini split air conditioner.

Why Choose 1/4" x 3/8" Insulated Copper Tube from DABUND PIPE

We are manufacturer of insulated copper tube since 2008 years, have good experience of producing and exporting. We have cooperated 9 years forwarder, can guarantee the shipment. Every week we load at least 6-8 40HQ to different countries. Choose Dabund You will win the business.

Individual pre-insulated rolls to perfectly fit every ductless mini-splits, VRF, heat pumps and unitary systems installation.

Quality products with competitive pricing

Peace of mind with professional services

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.What is a 50 ft 1/4" x 3/8" insulated copper tube used for?

It is used as a refrigerant line set in mini split air conditioners and HVAC systems, connecting indoor and outdoor units.

2.What size AC system uses a 1/4" x 3/8" copper line set?

This size is commonly used for 0.75–1 ton (9,000–12,000 BTU) mini split air conditioning systems.

3. Why is insulation important for copper tubing?

Insulation reduces heat loss, improves efficiency, and prevents condensation, especially in humid or outdoor environments.

4. Is this copper tubing compatible with R410A refrigerant?

Yes, it supports modern refrigerants like R410A and R32 due to its high pressure rating and compliance with HVAC standards.

5. Can this insulated copper pipe be used outdoors?

Yes, the insulation is UV-resistant and weatherproof, making it suitable for outdoor installation.

6. What standards does this copper tubing meet?

It complies with ASTM B280, UL94, ASTM E84, and ASTM D1056, ensuring safety and durability.

7. What are the advantages of pre-insulated copper pipes?

They reduce installation time, improve energy efficiency, and provide consistent insulation quality.

8. Can I customize the insulated copper tube?

Yes, OEM customization is available, including length, insulation thickness, branding, and packaging.

9. Is 50 ft a suitable length for HVAC installation?

Yes, 50 ft is a standard length suitable for most residential installations with moderate distance between indoor and outdoor units.