3/8" x 7/8" x 75 ft Insulated Copper Pipe for Split AC & HVAC Systems

This 3/8" x 7/8" x 75 ft insulated copper pipe is designed for high-capacity HVAC and split air conditioning systems. Built with premium-grade copper and durable insulation, it ensures efficient refrigerant flow, superior thermal protection, and long-term reliability for residential and commercial installations.

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

Product Overview – 75 ft HVAC Insulated Copper Line Set

This copper line set includes a 3/8" liquid line and 7/8" suction line, pre-insulated for convenience and performance.

• Length: 75 ft (22.8m)

• Material: 99.9% pure copper

• Insulation: PE or black rubber (optional thickness)

• Application: Split AC, heat pumps, ductless systems

Ideal for medium-to-long distance installations, ensuring stable and efficient HVAC operation.

Key Features of 3/8" x 7/8" Insulated Copper Pipe

High-Purity Copper for Maximum Efficiency

Manufactured from 99.9% pure copper, compliant with ASTM B280 and C12200 standards, delivering excellent thermal conductivity and corrosion resistance.

Designed for High-Capacity HVAC Systems

This size is commonly used for 6–8 ton (72,000–96,000 BTU) systems, supporting large residential or commercial air conditioning units.

Pre-Insulated for Energy Saving

Factory-applied insulation reduces heat loss and maintains refrigerant temperature, improving system efficiency and lowering energy consumption.

UV & Weather Resistant Insulation

The insulation layer is resistant to UV exposure, moisture, and environmental damage, making it suitable for outdoor installations.

Technical Specifications

Copper Tube Dimensions

• Liquid Line: 3/8 inch (9.52 mm)

• Suction Line: 7/8 inch (22.22 mm)

Insulation & Temperature Range

• Insulation Type: PE / Rubber Foam

• Working Temperature: -40°C to 120°C

Compliance Standards

• ASTM B280 (copper tubing)

• ASTM E84 (fire resistance)

• UL94 (flame retardant)

• ASTM D1056 (insulation quality)

These certifications ensure safety, durability, and HVAC compatibility.

Applications – Ideal for Large HVAC Systems

This insulated copper pipe is widely used in:

• Large split air conditioners

• Commercial HVAC systems

• VRF / VRV systems

• Heat pump installations

It supports high refrigerant flow demand while maintaining system stability.

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

With embossed polyethyene film, climate resistant foam, and  thickened insulated cotton, this three-layer insulated mini split copper line set is corrosion-resistant, fireproofing, flame-retarded, thermal insulation, waterproof, shockproof, sound absorption and durable.

Outer Layer: Anti-aging, UV-resistant PE fllm, wear-resistant embossed pattern, antl-aging.

Middle Layer: IXPE foam, dense cell, heat and cold-resistant, impact absorption, no water penetration, good thermal insulation. Water cross-linked PE foam.

Inner Layer: Closed-cell structure, air tightness; good thermal insulation, temperature resistant -40℃~120℃.

3/8 in. x 7/8 in. x 75 ft Insulated Copper Pipe for HVACR Applications Wholesaler & Supplier

DABUND PIPE in-house tested insulate copper pipe and tubing is designed to make installation simple and quick – saving you time and money on each job.

Insulated Copper Pipe for Split AC

1/4 + 3/8 Insulated copper pipe 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 pipe 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 pipe 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.

Insulated copper pipe 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 pipe 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 pipe used for 54K and 72K split air conditioner installation.

3/8 + 7/8 Insulated copper pipe apply for 72K - 96K ductless mini split air conditioner.

Benefits of Pre-Insulated Copper Line Sets

Enhanced Energy Efficiency

Minimizes thermal loss and improves cooling performance.

Condensation & Moisture Protection

Insulation acts as both thermal and moisture barrier, preventing condensation damage.

Faster Installation

Pre-insulated design eliminates additional wrapping, saving labor time.

Long Service Life

Corrosion-resistant copper combined with durable insulation ensures long-term reliability.

Customization & OEM Manufacturing

We offer flexible OEM/ODM services:

• Custom lengths (15m–50m or more)

• Insulation thickness customization

• Logo printing & branded packaging

• Bulk supply for distributors & contractors

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 3/8" x 7/8" insulated copper pipe used for?

It is used as a refrigerant line set for large HVAC and split air conditioning systems, connecting indoor and outdoor units.

2.What size AC system uses a 3/8" x 7/8" line set?

This size is typically used for 6–8 ton (72,000–96,000 BTU) air conditioning systems.

3.Why is insulation important for HVAC copper pipes?

Insulation reduces energy loss, prevents condensation, and maintains refrigerant efficiency, especially in outdoor or humid environments.

4.Is this copper pipe suitable for outdoor installation?

Yes, it features UV-resistant and weatherproof insulation, making it ideal for both indoor and outdoor applications.

5.What standards does this copper tubing meet?

It complies with ASTM B280, ASTM E84, UL94, and ASTM D1056, ensuring high safety and performance standards.

6.Can this insulated copper pipe handle modern refrigerants?

Yes, it is compatible with modern refrigerants such as R410A and R32 due to its high pressure resistance and material quality.

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

They reduce installation time, improve insulation consistency, lower labor costs, and enhance system efficiency.

8.Can I customize the copper pipe for my business?

Yes, OEM customization is available, including size, insulation type, branding, and packaging.

9.Is 75 ft a good length for HVAC installation?

Yes, 75 ft is ideal for medium to long-distance installations where indoor and outdoor units are spaced apart.