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DBJ-003
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DABUND
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Copper
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1M - 50M
Material
Color
Keywords
Application
3/8" x 7/8" x 75 ft Insulated Copper Pipe for Split AC HVAC Systems
The DABUND 3/8" x 7/8" x 75 ft insulated copper pipe is designed for high-capacity split AC, ductless HVAC, heat pump, VRF/VRV, and commercial air conditioning systems. Built with 99.9% pure copper and durable factory-applied insulation, it supports efficient refrigerant flow, superior thermal protection, condensation control, and long-term HVAC reliability.
This 75 ft HVAC line set includes a 3/8" liquid line and a 7/8" suction line. It is commonly used for larger air conditioning systems, including 6–8 ton and 72,000–96,000 BTU applications when the equipment manufacturer specifies this line size and installation distance.
Product Overview – 75 ft HVAC Insulated Copper Line Set
This insulated copper line set is a twin-pipe refrigerant piping solution for connecting indoor and outdoor HVAC units. The copper tubes are factory insulated to improve installation efficiency, reduce field wrapping work, and provide more consistent insulation performance.
Length: 75 ft / approximately 22.8 m
Liquid line: 3/8" / 9.52 mm
Suction line: 7/8" / 22.22 mm
Material: 99.9% pure copper
Insulation: white PE or black rubber options
Application: split AC, heat pump, ductless system, commercial HVAC, VRF/VRV
Key Features of 3/8" x 7/8" Insulated Copper Pipe
High-Purity Copper for Maximum Efficiency
The copper tubing is manufactured from 99.9% pure copper and can comply with ASTM B280 and C12200 standards according to product specification. High-purity copper provides excellent thermal conductivity, stable refrigerant transmission, corrosion resistance, and long service life.
Designed for High-Capacity HVAC Systems
The 3/8" + 7/8" line set size is commonly used for large HVAC systems requiring higher refrigerant flow. It can support 6–8 ton and 72,000–96,000 BTU systems when the air conditioner or heat pump manufacturer specifies this pipe size.
Pre-Insulated for Energy Saving
Factory-applied insulation reduces heat gain, heat loss, and surface condensation. This helps maintain refrigerant temperature stability, improve system efficiency, and reduce energy consumption during cooling and heating operation.
UV and Weather Resistant Insulation
The insulation layer is designed for UV resistance, moisture protection, wear resistance, and outdoor durability. It helps protect the copper pipe in exposed HVAC installations and long-distance refrigerant line runs.
Technical Specifications
| Parameter | Details |
|---|---|
| Product Name | 3/8" x 7/8" x 75 ft Insulated Copper Pipe |
| Product Type | Pre-insulated HVAC copper line set |
| Length | 75 ft / approximately 22.8 m |
| Liquid Line | 3/8 inch / 9.52 mm |
| Suction Line | 7/8 inch / 22.22 mm |
| Copper Material | 99.9% pure copper |
| Insulation Type | PE / rubber foam options |
| Temperature Range | -40°C to 120°C |
| Common Capacity | 6–8 ton / 72,000–96,000 BTU, depending on system requirements |
| Copper Standard | ASTM B280 / C12200 |
| Insulation Standards | ASTM E84, UL94, ASTM D1056, ASTM G21 according to specification |
| Application | Split AC, commercial HVAC, VRF/VRV, heat pump, ductless system |
Applications – Ideal for Large HVAC Systems
This insulated copper pipe is suitable for HVAC systems requiring higher refrigerant flow, longer installation routes, and stable thermal protection.
Large split air conditioners
Commercial HVAC systems
VRF and VRV systems
Ductless heat pump installations
Large residential air conditioning projects
Long-distance refrigerant line installations
99.9% Pure Copper
White PE Insulated Pipe
Plastic Cap Protection
Three-Layer Pipe Insulation Structure
With embossed polyethylene film, climate-resistant foam, and thick insulation material, this three-layer insulated copper line set provides corrosion resistance, flame-retardant performance, thermal insulation, waterproof protection, shock absorption, sound absorption, and long-term durability.
Thermal Insulation Pipe Production
Insulated Pipe Warehouse
Inner Layer Insulated Pipe
Outer Protective Layer
Anti-aging and UV-resistant PE film with wear-resistant embossed pattern helps protect the insulation surface during outdoor HVAC installation.
Middle IXPE Foam Layer
Dense-cell IXPE foam provides heat resistance, cold resistance, impact absorption, low water penetration, and reliable thermal insulation.
Inner Closed-Cell Layer
The closed-cell inner structure provides air tightness, moisture control, and stable insulation performance from -40°C to 120°C.
3/8" x 7/8" x 75 ft Insulated Copper Pipe for HVACR Applications
DABUND in-house tested insulated copper pipe and tubing is designed to make installation simple and efficient. It helps HVAC contractors, wholesalers, suppliers, and distributors save time and reduce labor cost on each project.
Insulated Copper Pipe for Split AC Size Options
| Size | Length | Insulation White PE | Flame Resistant |
| 1/4 + 3/8 | 15m / 20m / 25m / 30m / 50m | 8mm / 9mm / 10mm / 13mm / 19mm / 25.4mm | M1 / B1 |
| 1/4 + 1/2 | 15m / 20m / 25m / 30m / 50m | 8mm / 9mm / 10mm / 13mm / 19mm / 25.4mm | M1 / B1 |
| 1/4 + 5/8 | 15m / 20m / 25m / 30m / 50m | 8mm / 9mm / 10mm / 13mm / 19mm / 25.4mm | M1 / B1 |
| 3/8 + 5/8 | 15m / 20m / 25m / 30m / 50m | 8mm / 9mm / 10mm / 13mm / 19mm / 25.4mm | M1 / B1 |
| 3/8 + 3/4 | 15m / 20m / 25m / 30m / 50m | 8mm / 9mm / 10mm / 13mm / 19mm / 25.4mm | M1 / B1 |
| 1/2 + 3/4 | 15m / 20m / 25m / 30m / 50m | 8mm / 9mm / 10mm / 13mm / 19mm / 25.4mm | M1 / B1 |
| 3/8 + 7/8 | 15m / 20m / 25m / 30m / 50m | 8mm / 9mm / 10mm / 13mm / 19mm / 25.4mm | M1 / B1 |
Line Set Size and HVAC Capacity Reference
| Line Set Size | Common Ton / HP Range | Common BTU Range | Typical Application |
|---|---|---|---|
| 1/4 + 3/8 | 0.75 ton – 1.0 ton / 0.75P – 1P | 9000–12000 BTU / 9K–12K | Small split air conditioner |
| 1/4 + 1/2 | 1.5 ton – 2.0 ton / 1.5P – 2P | 12000–18000 BTU / 12K–18K | Medium mini split air conditioner |
| 1/4 + 5/8 | 2.0 ton – 2.5 ton / 2P – 2.5P | 24000–30000 BTU / 24K–30K | Split AC and heat pump system |
| 3/8 + 5/8 | 3.0 ton – 4.0 ton / 3P – 4P | 36000–48000 BTU / 36K–48K | Ductless commercial air conditioner |
| 3/8 + 3/4 | 4.5 ton – 6.0 ton / 4.5P – 6P | 54000–72000 BTU / 54K–72K | Large split air conditioner installation |
| 3/8 + 7/8 | 6.0 ton – 8.0 ton / 6P – 8P | 72000–96000 BTU / 72K–96K | High-capacity ductless HVAC system |
Benefits of Pre-Insulated Copper Line Sets
Enhanced Energy Efficiency
Pre-insulated copper tubing minimizes thermal loss and helps maintain refrigerant temperature, improving cooling and heating performance.
Condensation and Moisture Protection
Insulation works as both a thermal barrier and a moisture barrier, helping prevent condensation damage in humid, outdoor, or long-distance HVAC installations.
Faster Installation
The pre-insulated design reduces additional wrapping work, shortens installation time, and helps contractors reduce labor cost.
Long Service Life
Corrosion-resistant copper combined with durable insulation supports long-term performance, reduced maintenance, and reliable HVAC operation.
Customization and OEM Manufacturing
DABUND provides flexible OEM and ODM services for HVAC brands, distributors, wholesalers, contractors, and importers. Custom specifications can be supplied according to different markets, installation habits, and packaging requirements.
Custom lengths: 15m, 20m, 25m, 30m, 50m, 75 ft, or more
Custom pipe size combinations
Insulation thickness customization
White PE and black rubber insulation options
Logo printing and pipe marking
Branded packaging and private label support
Bulk supply for distributors and contractors
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, and HVAC parts face to face.
FAQ
What is a 3/8" x 7/8" insulated copper pipe used for?
It is used as a refrigerant line set for high-capacity split AC, commercial HVAC, VRF/VRV, ductless heat pump, and large air conditioning systems, connecting indoor and outdoor units.
What size AC system uses a 3/8" x 7/8" line set?
This size is typically used for 6–8 ton or 72,000–96,000 BTU air conditioning systems. Final line set selection should always follow the HVAC equipment manufacturer’s installation manual.
Why is insulation important for HVAC copper pipes?
Insulation reduces energy loss, prevents condensation, protects copper tubing, and maintains refrigerant efficiency, especially in outdoor, humid, or long-distance HVAC installations.
Is this copper pipe suitable for outdoor installation?
Yes. The insulation is designed for UV resistance, weather protection, moisture control, and outdoor durability according to the selected product specification.
What standards does this copper tubing meet?
The copper tube and insulation can meet ASTM B280, C12200, ASTM E84, UL94, ASTM D1056, and ASTM G21 requirements according to product material and specification.
Can this insulated copper pipe handle modern refrigerants?
Yes. It can support modern refrigerants such as R410A and R32 when the copper size, wall thickness, pressure rating, installation distance, and system requirements match.
What are the advantages of pre-insulated copper pipes?
Pre-insulated copper pipes reduce installation time, improve insulation consistency, lower labor cost, prevent condensation, and enhance HVAC system efficiency.
Can I customize the copper pipe for my business?
Yes. DABUND supports OEM and ODM customization, including pipe size, length, insulation type, insulation thickness, logo printing, pipe marking, branded packaging, and bulk supply.
Is 75 ft a good length for HVAC installation?
Yes. 75 ft is useful for medium-to-long distance HVAC installations where indoor and outdoor units are spaced apart. Installers should confirm maximum line length, elevation difference, and refrigerant charge requirements before installation.
Who should buy this 3/8" x 7/8" x 75 ft insulated copper pipe?
This product is suitable for HVAC contractors, split AC installers, VRF/VRV system suppliers, distributors, importers, wholesalers, OEM brands, and commercial HVAC project buyers.
