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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
1/2" x 3/4" Mini Split Line Set Manufacturer for HVAC Systems
The DABUND 1/2" x 3/4" mini split line set combines two pre-insulated copper tubes with outside diameters of 12.7 mm and 19.05 mm. It is manufactured for HVAC and refrigeration installations that require clean, protected refrigerant tubing, consistent insulation performance, and customizable lengths, branding, and packaging.
The copper tubing is made from 99.9% pure C12200 DHP copper and is designed to meet ASTM B280 requirements. Black closed-cell insulation helps reduce heat gain, condensation, and weather exposure. Before ordering, confirm the required tube diameter, wall thickness, refrigerant, maximum working pressure, and line-set length against the equipment manufacturer's installation manual.
1/2" x 3/4" Mini Split Line Set Specifications
| Product | Pre-insulated 1/2" x 3/4" mini split line set |
| Copper Tube Outside Diameter | 1/2" and 3/4" (12.7 mm and 19.05 mm) |
| Copper Material | C12200 DHP copper, 99.9% purity |
| Copper Standard | ASTM B280 |
| Available Lengths | 15 m, 20 m, 25 m, 30 m, and 50 m; custom lengths are available for qualified orders |
| Insulation | Black high-density closed-cell insulation with UV-resistant options |
| Insulation Thickness Options | 8 mm, 9 mm, 10 mm, 13 mm, 19 mm, and 25.4 mm |
| Insulation Temperature Range | -40°C to 120°C |
| Referenced Insulation Standards | ASTM E84, UL 94, ASTM D1056, and ASTM G21; confirm the exact test report required for your market and order |
| Applications | Ductless mini split systems, heat pumps, VRF/VRV systems, central air-conditioning systems, and refrigeration equipment |
| Customization | OEM printing, private-label packaging, insulation thickness, length, end protection, and cap color |
Important: A 1/2" x 3/4" refrigerant line set is not automatically suitable for every system of a particular tonnage or BTU rating. The correct liquid-line and suction-line diameters depend on the equipment model, refrigerant, vertical lift, total equivalent length, and manufacturer requirements.
Key Features of the 1/2" x 3/4" Copper Line Set
ASTM B280 C12200 Copper Tubing
The two copper tubes use C12200 deoxidized high-phosphorus copper for HVAC and refrigeration service. The smooth internal surface supports refrigerant flow, while the coiled format helps contractors route the tubing through residential, commercial, and light-industrial installations.
Pre-Insulated for Condensation Control
Closed-cell insulation provides a thermal and moisture barrier around the copper tubing. This helps limit condensation, heat transfer, and external moisture exposure when the line set is installed and sealed correctly.
UV-Resistant Insulation Options
UV-resistant insulation options are available for projects with outdoor line-set sections. Local codes may still require a protective line-set cover, jacket, conduit, or additional weather protection.
Protected Ends and Installation-Ready Packaging
Protective caps help keep dust and debris out of the copper tubing during storage and transport. The two insulated tubes can be bundled neatly to simplify handling, warehousing, and delivery to HVAC distributors, contractors, and project sites.
OEM and Wholesale Supply
DABUND supports wholesale and project orders with custom printing, product sizes, meter markings, packaging, labels, and other OEM/ODM requirements. Provide your required specification, annual volume, destination market, and compliance documents when requesting a quotation.
99.9% Pure Copper
Closed-Cell Insulation
Protective End Caps
Black Pipe Insulation Performance
The black insulation is designed for HVAC line-set protection across a stated temperature range of -40°C to 120°C. Its closed-cell structure helps reduce moisture penetration and thermal transfer when joints, seams, wall penetrations, and outdoor sections are sealed correctly.
Available insulation configurations can be selected for different climates, building requirements, and distribution markets. Confirm insulation thickness, density, flame-performance documentation, UV exposure requirements, and local building-code compliance before production.
Mini Split Line Set Sizes and Custom Options
In addition to the 1/2" x 3/4" copper line set, DABUND supplies common HVAC line-set combinations for mini split, heat pump, VRF, air-conditioning, and refrigeration projects. Final dimensions and wall thicknesses must be matched to the equipment manufacturer's technical requirements.
| Line Set Size | Available Lengths | Black Insulation Thickness | Flame-Retardant Options |
|---|---|---|---|
| 1/4" + 3/8" | 15 m / 20 m / 25 m / 30 m / 50 m | 8 / 9 / 10 / 13 / 19 / 25.4 mm | M1 / B1 options |
| 1/4" + 1/2" | 15 m / 20 m / 25 m / 30 m / 50 m | 8 / 9 / 10 / 13 / 19 / 25.4 mm | M1 / B1 options |
| 1/4" + 5/8" | 15 m / 20 m / 25 m / 30 m / 50 m | 8 / 9 / 10 / 13 / 19 / 25.4 mm | M1 / B1 options |
| 3/8" + 5/8" | 15 m / 20 m / 25 m / 30 m / 50 m | 8 / 9 / 10 / 13 / 19 / 25.4 mm | M1 / B1 options |
| 3/8" + 3/4" | 15 m / 20 m / 25 m / 30 m / 50 m | 8 / 9 / 10 / 13 / 19 / 25.4 mm | M1 / B1 options |
| 1/2" + 3/4" | 15 m / 20 m / 25 m / 30 m / 50 m | 8 / 9 / 10 / 13 / 19 / 25.4 mm | M1 / B1 options |
| 3/8" + 7/8" | 15 m / 20 m / 25 m / 30 m / 50 m | 8 / 9 / 10 / 13 / 19 / 25.4 mm | M1 / B1 options |
Selection guidance: Do not select a refrigerant line set by BTU or tonnage alone. Verify the indoor and outdoor unit connection sizes, allowable total length, vertical separation, additional refrigerant charge, and oil-return requirements in the system installation manual.
HVAC and Refrigeration Applications
The 1/2" x 3/4" insulated copper line set can be manufactured for compatible ductless mini split systems, heat pumps, VRF/VRV equipment, packaged HVAC projects, commercial air-conditioning systems, and refrigeration installations. Suitability depends on the equipment connection sizes and engineering requirements.
For long-line or high-rise projects, provide the total equivalent piping length, vertical lift, refrigerant type, design pressure, required wall thickness, insulation specification, and local compliance requirements. DABUND can then recommend a production specification for technical approval.
Why Buy 1/2" x 3/4" Mini Split Line Sets from DABUND?
HVAC Line Set Manufacturing Experience Since 2008
DABUND has manufactured and exported insulated copper pipe, mini split line sets, aluminum pipe, and HVAC accessories since 2008. The factory supports distributors, HVAC brands, importers, contractors, and project buyers in multiple international markets.
In-House Insulation and Custom Production
In-house insulation production supports control over dimensions, printing, appearance, packaging, and order-specific configurations. Buyers can request private-label line sets with custom company names, size markings, meter markings, cartons, and protective caps.
Samples and Export Support
Qualified buyers may request samples for dimensional, insulation, packaging, and installation evaluation. DABUND supports common export terms including EXW, FOB, CFR, and CIF, subject to quotation and destination.
Testing and Compliance Documentation
Available line-set configurations reference ASTM B280 for copper tubing and insulation test standards including ASTM E84, UL 94, ASTM D1056, and ASTM G21. Because requirements vary by product configuration and destination market, request the current test reports, certificates, material data, and production specification for the exact item being purchased.
DABUND at International HVAC Exhibitions
DABUND participates in international HVAC and refrigeration exhibitions so distributors and project buyers can inspect mini split line sets, insulated copper tubing, and HVAC accessories in person and discuss market-specific product requirements.
Frequently Asked Questions About 1/2" x 3/4" Mini Split Line Sets
What does 1/2" x 3/4" mean on a mini split line set?
It identifies the outside diameters of the two copper tubes: 1/2 inch (12.7 mm) and 3/4 inch (19.05 mm). Confirm which tube is assigned as the liquid, suction, gas, or discharge line in the equipment documentation.
Is a 1/2" x 3/4" line set suitable for my mini split or heat pump?
It is suitable only when both tube diameters, wall thicknesses, refrigerant compatibility, pressure rating, and permitted piping length match the equipment manufacturer's installation manual. Do not choose the line set from system capacity alone.
What copper material is used in the line set?
DABUND uses 99.9% pure C12200 DHP copper tubing designed to meet ASTM B280 requirements for air-conditioning and refrigeration service.
Can this copper line set be used with R410A or R32 equipment?
A compatible version can be produced for high-pressure HVAC refrigerants, but approval depends on the specified copper wall thickness, design pressure, fittings, installation method, and equipment requirements. State the refrigerant and operating conditions when requesting a quotation.
What lengths are available for the 1/2" x 3/4" HVAC line set?
Standard production options include 15 m, 20 m, 25 m, 30 m, and 50 m coils. Custom lengths may be available depending on the required tube dimensions, end type, packaging, and order quantity.
What insulation thicknesses can DABUND provide?
Available black insulation thicknesses include 8 mm, 9 mm, 10 mm, 13 mm, 19 mm, and 25.4 mm. The correct thickness depends on pipe temperature, ambient temperature, relative humidity, condensation risk, energy code, and local regulations.
Can the line set be installed outdoors?
UV-resistant insulation options are available, but exposed outdoor sections may still require a line-set cover or protective jacket. Seal insulation joints and wall penetrations to reduce water entry, air leakage, and insulation degradation.
Does DABUND offer OEM branding and private-label packaging?
Yes. OEM and ODM options can include company-name printing, tube-size and meter markings, insulation color or thickness, protective caps, labels, cartons, and other packaging requirements.
Can I request a free sample?
Qualified buyers can request samples for evaluation. Sample availability, quantity, configuration, and freight charges depend on the requested product. Visit the free sample page or contact DABUND with your specification.
What information is needed for an accurate wholesale quotation?
Provide the copper tube diameters and wall thicknesses, coil length, refrigerant, insulation material and thickness, end type, required standards, packaging, branding, quantity, destination port, and preferred Incoterm. This allows the sales and engineering teams to quote the correct configuration.
Request a Quote for 1/2" x 3/4" Mini Split Line Sets
Send DABUND your HVAC line-set specification, order quantity, target market, required certificates, packaging design, and delivery destination. The team can provide a product recommendation, sample plan, lead-time estimate, and wholesale quotation for your project or distribution program.
