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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
82 ft 1/4" x 3/8" Mini Split Line Set for HVAC Air Conditioning Systems
The 82 ft 1/4" x 3/8" mini split line set from Dabund is designed for long-distance residential and light commercial HVAC installations. It connects indoor and outdoor units in ductless mini split air conditioning systems, helping refrigerant circulate efficiently while maintaining stable cooling and heating performance.
This pre-insulated copper line set includes a 1/4 inch liquid line and a 3/8 inch suction line, making it a common choice for small-capacity mini split systems, heat pumps, and air conditioning projects where an extended 82 ft refrigerant line is required.
Product Overview – 82 ft Pre-Insulated Copper Line Set
This 82 ft mini split line set is manufactured with high-purity copper and factory-applied insulation. It is suitable for HVAC contractors, installers, distributors, and OEM buyers who need reliable copper tubing for ductless air conditioning systems.
Liquid Line: 1/4" / 6.35 mm
Suction Line: 3/8" / 9.52 mm
Length: 82 ft / 25 m
Material: 99.9% pure copper
Structure: Twin pre-insulated copper pipes
Application: Ductless mini split, heat pump, residential AC, light commercial HVAC
The 1/4" x 3/8" size is one of the most widely used mini split line set configurations for small-capacity air conditioning systems, especially for 9,000 BTU and 12,000 BTU installations.
High-Quality Copper Tubing for Stable HVAC Performance
99.9% Pure Copper Meets HVAC Standards
Dabund mini split line sets are made with high-purity C12200 copper and designed to meet ASTM B280 requirements. High-quality copper tubing helps deliver excellent thermal conductivity, stable refrigerant flow, corrosion resistance, and long service life.
High Pressure Resistance for Modern Refrigerants
With a pressure rating of 2100–7000 PSI, this 1/4" x 3/8" copper line set is suitable for modern HVAC refrigerants such as R410A and other high-pressure air conditioning applications.
Factory-Insulated for Faster Installation
The copper pipes are pre-insulated at the factory, helping installers reduce manual wrapping time, improve insulation consistency, and lower the risk of condensation problems during long-term HVAC operation.
Advanced Insulation Technology for Energy Efficiency
UV-Resistant and Weatherproof Insulation
The insulation is made from UV-resistant PE, polypropylene, or black rubber material. It helps protect the copper pipe from outdoor exposure, temperature fluctuation, moisture, and installation wear.
UV resistance for outdoor installation
Flame-retardant performance
Operating temperature range from -40℃ to 120℃
Closed-cell insulation structure
Moisture and condensation protection
Triple-Layer Insulation Structure
Outer Layer: UV-resistant embossed protective film
Middle Layer: High-density foam insulation
Inner Layer: Closed-cell moisture-resistant insulation
This multi-layer structure helps improve thermal insulation, prevent water vapor penetration, and maintain stable performance in both indoor and outdoor HVAC installations.
99.9% Pure Copper
Black Rubber Insulated Pipe
Plastic Cap Protection
Features of Black Rubber Pipe Insulation Tubing
Black rubber pipe insulation provides strong moisture resistance and thermal insulation for mini split copper line sets. It is suitable for installations where condensation control, durability, and weather resistance are important.
Temperature range from -40℃ to 120℃
Better moisture condensation protection
Insulation layer and moisture-proof layer in one structure
No additional water vapor permeation protective layer required in many applications
Suitable for outdoor and indoor HVAC pipe insulation
Key Benefits of 82 ft Mini Split Line Set
Ideal for Long-Distance Residential Installations
The 82 ft length is suitable for installations where the indoor and outdoor units are positioned far apart. A longer continuous line set can reduce the need for extra joints, helping lower refrigerant leak risk and improve system reliability.
Houses and apartments
Multi-room installation layouts
Outdoor condenser units installed far from indoor units
Complex routing projects
Residential retrofit HVAC installations
Optimized for Small HVAC Systems
The 1/4" + 3/8" mini split line set is commonly used for small-capacity ductless systems, including 9,000 BTU, 12,000 BTU, and selected 18,000 BTU air conditioning systems depending on equipment requirements.
Improves Energy Efficiency and System Performance
Pre-insulated copper tubing reduces unwanted heat exchange, helps maintain refrigerant temperature, and supports efficient cooling and heating operation.
Easy Installation and Reduced Labor Cost
Factory-insulated pipes simplify HVAC installation by reducing on-site insulation work. This helps contractors improve installation efficiency and maintain consistent insulation quality across projects.
Durable, Corrosion-Resistant, and Long-Lasting
Copper provides natural corrosion resistance and stable mechanical strength. With proper installation and maintenance, a high-quality mini split line set can deliver long-term performance for residential and light commercial HVAC systems.
HVAC Applications and Compatibility
This 82 ft 1/4" x 3/8" mini split line set is widely used for small ductless HVAC systems and heat pump installations.
Ductless mini split air conditioning systems
Residential heat pumps
Single-zone and selected multi-zone HVAC systems
Residential cooling and heating projects
Small commercial cooling systems
Long-distance refrigerant line installations
It is commonly suitable for 0.75–1.5 ton air conditioning systems. Final line set sizing should always follow the HVAC equipment manufacturer’s installation manual.
Technical Specifications
| Feature | Details |
|---|---|
| Product Name | 82 ft 1/4" x 3/8" Mini Split Line Set |
| Length | 82 ft / 25 m |
| Liquid Line | 1/4" / 6.35 mm |
| Suction Line | 3/8" / 9.52 mm |
| Copper Material | 99.9% Pure Copper / C12200 |
| Insulation Material | UV-Resistant PE / Polypropylene / Black Rubber |
| Temperature Range | -40℃ to 120℃ |
| Pressure Rating | 2100–7000 PSI |
| Standards | ASTM B280, C12200, UL94, ASTM E84, ASTM D1056, ASTM G21 |
| Typical HVAC Capacity | 0.75–1.5 Ton / 9,000–18,000 BTU depending on system requirements |
| Applications | Mini split AC, ductless HVAC, heat pump, residential AC, light commercial systems |
OEM Customization and Manufacturing Capabilities
Dabund provides OEM and ODM manufacturing services for HVAC brands, wholesalers, distributors, and project buyers. In-house insulation production helps maintain consistent quality and flexible customization.
Custom insulation colors: black, white, and other options
Logo printing on insulation
Custom lengths from 15m to 50m and above
Custom insulation thickness: 8mm, 9mm, 10mm, 13mm, 19mm, 25.4mm
Private label packaging
OEM and ODM production for HVAC line set distributors
Available Mini Split Line Set Sizes
| Size | Length | Insulation Black Rubber | 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 |
Mini Split Line Set Size Guide
| Line Set Size | Typical Ton Range | Typical BTU Range | Common Use |
|---|---|---|---|
| 1/4" + 3/8" | 0.75–1.0 Ton | 9,000–12,000 BTU | Small ductless mini split air conditioner |
| 1/4" + 1/2" | 1.5–2.0 Ton | 12,000–18,000 BTU | Residential mini split and heat pump |
| 1/4" + 5/8" | 2.0–2.5 Ton | 24,000–30,000 BTU | Medium-capacity split AC system |
| 3/8" + 5/8" | 3.0–4.0 Ton | 36,000–48,000 BTU | Large residential or light commercial HVAC |
| 3/8" + 3/4" | 4.5–6.0 Ton | 54,000–72,000 BTU | Commercial split air conditioning system |
| 3/8" + 7/8" | 6.0–8.0 Ton | 72,000–96,000 BTU | Large ductless HVAC installation |
Why Choose Dabund Mini Split Line Set?
Over 15 years of HVAC manufacturing experience
Full in-house production for copper pipe and insulation
Stable weekly global shipments
Strict quality control standards
Competitive factory-direct pricing
One-stop HVAC line set and HVAC parts supply
Dabund provides a one-stop HVAC solution for contractors, distributors, importers, wholesalers, and OEM buyers who need reliable mini split line sets with flexible customization.
Dabund Factory
Dabund produces insulated copper pipe, mini split line set, aluminum pipe, and HVAC parts for global customers.
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 mini split line sets, insulated copper pipes, and HVAC parts face to face.
FAQ About 82 ft 1/4" x 3/8" Mini Split Line Set
What is an 82 ft 1/4" x 3/8" mini split line set used for?
It is used to connect indoor and outdoor units in mini split air conditioning systems. The line set allows refrigerant to circulate between units and supports both cooling and heating operation.
What size HVAC system is this line set suitable for?
The 1/4" + 3/8" configuration is commonly used for 9,000–12,000 BTU mini split systems and selected 18,000 BTU systems depending on equipment requirements. Always confirm with the HVAC unit installation manual.
Why choose an 82 ft long mini split line set?
An 82 ft line set is suitable for installations where the indoor and outdoor units are far apart. It reduces the need for additional connections, helping lower leak risk and improve reliability.
Is this copper line set compatible with R410A refrigerant?
Yes. This mini split line set supports high-pressure refrigerants such as R410A because it uses strong copper tubing with a pressure rating of 2100–7000 PSI.
What type of insulation is used in this mini split line set?
The insulation can be UV-resistant PE, polypropylene, or black rubber with a closed-cell structure. It provides thermal insulation, moisture resistance, and outdoor durability.
Can this mini split line set be used outdoors?
Yes. The UV-resistant and weatherproof insulation makes it suitable for outdoor installation, helping protect against sunlight, rain, and temperature changes.
What are the advantages of pre-insulated copper line sets?
Pre-insulated copper line sets save installation time, provide consistent insulation quality, reduce energy loss, and help prevent condensation on refrigerant piping.
Can I customize this HVAC line set for my brand?
Yes. Dabund supports OEM and ODM customization, including custom branding, insulation color, logo printing, custom length, insulation thickness, and private label packaging.
How long does a mini split line set last?
With proper installation, high-quality copper tubing and durable insulation can support long-term HVAC operation for 15–20 years or more depending on the working environment.
Are you a manufacturer or trading company?
Dabund is a manufacturer of mini split line sets, insulated copper pipes, aluminum pipes, and HVAC parts.
Can I get samples before bulk ordering?
Yes. Samples can be provided for product evaluation. Buyers usually need to cover express shipping cost.
