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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
75 Ft 1/4" x 3/8" Pre-Insulated Copper Pipe
The 75 ft 1/4" x 3/8" pre-insulated copper pipe from DABUND is designed for compatible mini split air conditioners, heat pumps, split AC systems, refrigeration equipment, and HVACR installation projects. It combines a 1/4-inch copper liquid line and a 3/8-inch copper suction line with white PE insulation for faster installation, cleaner routing, and better pipe protection.
DABUND PIPE has produced HVAC parts, pre-insulated copper pipe, mini split line sets, aluminum pipe, and air conditioner installation materials since 2008. This 75 ft line set is suitable for HVAC wholesalers, distributors, importers, contractors, private-label brands, and OEM buyers that need stable copper quality, export-ready packaging, and customized insulation options.
Compatibility note: Always confirm the required liquid-line size, suction-line size, copper wall thickness, maximum line length, refrigerant type, flare connection, insulation thickness, and additional refrigerant charge according to the equipment manufacturer’s installation manual.
Product Specifications
| Product Name | 75 Ft 1/4" x 3/8" Pre-Insulated Copper Pipe |
| Product Type | Pre-insulated copper pipe / mini split line set / HVAC refrigerant copper tubing |
| Copper Line Size | 1/4" x 3/8" |
| Metric Size | 6.35 mm x 9.52 mm outside diameter |
| Length | 75 ft / approximately 22.86 m |
| Copper Material | 99.9% pure copper, C12200 DHP copper option available |
| Copper Standard | ASTM B280 configuration available for HVAC and refrigeration field service |
| Insulation Type | White PE insulation with embossed outer film and closed-cell foam structure |
| Insulation Thickness | 1/2" standard option; 8 mm, 9 mm, 10 mm, 13 mm, 19 mm, and 25.4 mm options available |
| Working Temperature | -40°C to 120°C for stated insulation configuration |
| Pressure Rating | 2100 to 7000 PSI depending on copper size and configuration |
| Available Test Reports | ASTM E84, UL 94, ASTM D1056, ASTM G21, and related insulation documentation |
| Applications | Ductless mini split, heat pump, air conditioning, refrigeration, centralized air ducted units, and HVACR systems |
| Customization | Copper size, length, insulation thickness, insulation color, printed company name, size mark, meter mark, carton design, and OEM branding |
Key Features of 75 Ft 1/4" x 3/8" Pre-Insulated Copper Pipe
1/4" x 3/8" Copper Tube Size
The 1/4" x 3/8" size refers to the outside diameter of the copper tubes. In metric measurement, it is approximately 6.35 mm x 9.52 mm. This line set should be used only for HVAC equipment that specifies this exact liquid-line and suction-line combination.
99.9% Pure Copper for HVACR Use
The copper pipe is available with 99.9% pure copper, ASTM B280 configuration, and C12200 DHP copper options. High-quality copper tubing supports stable refrigerant flow, pressure performance, bendability, and long service life in air conditioning and refrigeration systems.
White PE Pre-Insulation
The white PE insulation helps reduce heat transfer, control condensation, protect the copper pipe, and improve installation appearance. The embossed outer layer provides wear resistance and better surface protection during transport and installation.
75 Ft Length for Longer Installations
The 75 ft length is suitable for compatible installations where the indoor and outdoor units are placed farther apart. Installers should verify the equipment’s maximum allowed line length, vertical lift limit, bend radius, vacuum requirement, and refrigerant charge calculation before installation.
OEM Printing and Bulk Supply
DABUND produces insulation in-house and can print company name, brand logo, pipe size, meter marks, and product information on the insulation surface. This helps wholesalers, importers, and private-label brands build a more professional HVAC product line.
99.9% Pure Copper
White PE Insulated Pipe
Plastic Cap Protection
White PE Pipe Insulation Structure
The white PE insulation structure is designed for HVAC copper line protection, thermal insulation, condensation control, and outdoor durability. It combines an embossed PE outer film, climate-resistant foam, and thickened inner insulation to improve long-term installation performance.
Insulation Pipe Production
Insulated Pipe Warehouse
Inner Layer Insulated Pipe
Three-Layer Insulation Design
The three-layer insulated mini split copper line set includes embossed polyethylene film, climate-resistant foam, and thickened insulation cotton. This structure improves corrosion resistance, flame-retardant performance, thermal insulation, waterproof protection, shock resistance, sound absorption, and durability.
Outer layer: Anti-aging and UV-resistant PE film with wear-resistant embossed pattern.
Middle layer: IXPE foam with dense cells, heat and cold resistance, impact absorption, no water penetration, and good thermal insulation.
Inner layer: Closed-cell structure with good airtightness, thermal insulation, and temperature resistance from -40°C to 120°C.
75 Ft Pre-Insulated Copper Pipe for HVACR Applications
This 75 ft 1/4" x 3/8" pre-insulated copper pipe is designed for compatible HVACR applications where the system requires this exact copper line size and length. It helps contractors complete installation more efficiently while reducing on-site insulation work.
Typical applications include ductless mini split systems, heat pumps, split air conditioners, refrigeration systems, replacement line-set projects, and light-commercial HVAC installations. Final use must be confirmed against the equipment manual and local installation requirements.
Available Pre-Insulated Copper Pipe Sizes
DABUND supplies multiple pre-insulated copper pipe sizes for air conditioning, mini split, heat pump, refrigeration, and HVACR systems. Length, insulation thickness, flame-resistant level, printing, and packaging can be customized for bulk orders.
| Size | Length | Insulation White PE | Flame Resistant |
| 1/4" + 3/8" | 15 m / 20 m / 25 m / 30 m / 50 m / customized | 8 mm / 9 mm / 10 mm / 13 mm / 19 mm / 25.4 mm | M1 / B1 |
| 1/4" + 1/2" | 15 m / 20 m / 25 m / 30 m / 50 m / customized | 8 mm / 9 mm / 10 mm / 13 mm / 19 mm / 25.4 mm | M1 / B1 |
| 1/4" + 5/8" | 15 m / 20 m / 25 m / 30 m / 50 m / customized | 8 mm / 9 mm / 10 mm / 13 mm / 19 mm / 25.4 mm | M1 / B1 |
| 3/8" + 5/8" | 15 m / 20 m / 25 m / 30 m / 50 m / customized | 8 mm / 9 mm / 10 mm / 13 mm / 19 mm / 25.4 mm | M1 / B1 |
| 3/8" + 3/4" | 15 m / 20 m / 25 m / 30 m / 50 m / customized | 8 mm / 9 mm / 10 mm / 13 mm / 19 mm / 25.4 mm | M1 / B1 |
| 1/2" + 3/4" | 15 m / 20 m / 25 m / 30 m / 50 m / customized | 8 mm / 9 mm / 10 mm / 13 mm / 19 mm / 25.4 mm | M1 / B1 |
| 3/8" + 7/8" | 15 m / 20 m / 25 m / 30 m / 50 m / customized | 8 mm / 9 mm / 10 mm / 13 mm / 19 mm / 25.4 mm | M1 / B1 |
How to Choose the Correct Pre-Insulated Copper Line Set
The copper line-set size should be selected according to the equipment manufacturer’s installation manual, not only by BTU or tonnage. Different air conditioner brands and models can use different pipe diameters even when the nominal cooling capacity is similar.
| Line Set Size | Common Reference Application | Selection Notice |
| 1/4" + 3/8" | Systems requiring 1/4" liquid line and 3/8" suction line | Confirm connection size, maximum length, and refrigerant charge before purchase |
| 1/4" + 1/2" | Small to medium mini split and split AC systems | Check the equipment manual before ordering |
| 1/4" + 5/8" | Selected HVAC systems with larger suction-line requirement | Do not select by BTU alone |
| 3/8" + 5/8" | Medium to larger split AC or heat pump systems | Confirm refrigerant type and pressure requirement |
| 3/8" + 3/4" | Higher-capacity HVAC systems | Confirm insulation thickness and installation design |
| 3/8" + 7/8" | Large HVACR applications | Confirm compatibility before procurement |
Why Choose DABUND PIPE as Your Pre-Insulated Copper Pipe Manufacturer?
DABUND PIPE is a manufacturer of pre-insulated copper pipe, insulated copper line sets, mini split line sets, aluminum pipe, and HVAC parts. With production experience since 2008, DABUND supports global buyers with stable factory supply, export service, OEM customization, and bulk-order capability.
Factory production: Integrated production of copper pipe, insulation, line sets, and HVAC accessories.
Experience since 2008: Long-term manufacturing and export experience in HVAC line set products.
OEM support: Custom printing, logo, insulation thickness, carton design, and private-label packaging.
Flexible size range: Copper sizes from 1/4" to 1 1/8" and lengths from 15 m to 50 m are available.
Bulk order supply: Suitable for wholesalers, distributors, importers, contractors, HVAC brands, and project buyers.
Export coordination: Support for EXW, FOB, CFR, CIF, documentation, and shipment planning.
DABUND Factory
DABUND produces insulated copper pipe, mini split line sets, aluminum pipe, and HVAC parts for distributors, wholesalers, contractors, importers, and OEM brands.
SGS Certificate and Test Reports
Selected insulation configurations can support documentation such as ASTM E84, UL 94, ASTM D1056, ASTM G21, UV resistance, flame performance, and material property reports. Please confirm the exact material and report version before order confirmation.
International HVAC Exhibitions
DABUND attends international HVAC exhibitions to help customers inspect pre-insulated copper pipe, mini split line sets, installation kits, and HVAC accessories directly.
FAQ About 75 Ft 1/4" x 3/8" Pre-Insulated Copper Pipe
What does 75 ft 1/4" x 3/8" pre-insulated copper pipe mean?
It means the product is a 75 ft pre-insulated copper line set with one 1/4-inch copper tube and one 3/8-inch copper tube. These two tubes are commonly used as liquid and suction lines in compatible air conditioning and refrigeration systems.
Is this 1/4" x 3/8" line set suitable for every mini split?
No. It is suitable only for HVAC equipment that requires a 1/4" liquid line and 3/8" suction line. Always check the indoor and outdoor unit connection sizes before ordering.
Can I use a 75 ft line set without adding refrigerant?
Not always. Many air conditioners are factory charged for a specific line length. If the installed line length exceeds the factory-charged allowance, additional refrigerant may be required according to the equipment manufacturer’s formula.
What is the insulation material?
This product uses white PE insulation with a multi-layer structure. The insulation can include an embossed PE outer layer, IXPE foam middle layer, and closed-cell inner insulation for thermal protection and condensation control.
Does the copper pipe meet ASTM B280?
ASTM B280 copper tube configuration is available. Buyers should confirm copper material, wall thickness, pressure rating, test documentation, and project requirements before mass production.
Can this pre-insulated copper pipe be used for R410A systems?
It can be supplied for compatible HVAC systems, but final use depends on copper wall thickness, pressure rating, refrigerant type, local code, and the equipment manufacturer’s installation requirements.
Can DABUND print our company name on the insulation?
Yes. DABUND can print company name, brand logo, pipe size, meter marks, and product information on the insulation surface for OEM and private-label orders.
Can I order customized lengths and sizes?
Yes. DABUND can supply different copper sizes such as 1/4", 3/8", 1/2", 5/8", 3/4", 7/8", and 1 1/8". Lengths such as 15 m, 20 m, 25 m, 30 m, 50 m, and customized lengths are available.
Are you a manufacturer or trading company?
DABUND is a manufacturer of pre-insulated copper pipe, insulated copper line sets, mini split line sets, aluminum pipe, and related HVAC parts.
Can I get samples before bulk order?
Yes. Sample support is available. Buyers can check copper quality, insulation structure, insulation thickness, printing, packaging, and product quality before confirming bulk orders.
What payment terms do you accept?
Common payment terms include T/T, L/C at sight, credit card, and other agreed payment methods depending on order value and cooperation terms.
What delivery terms are available?
DABUND can support EXW, FOB, CFR, CIF, and other common export delivery terms. Final terms depend on destination, order volume, shipping method, and buyer requirements.
How long is the delivery time?
Standard delivery time is usually around 15 to 20 days, depending on order quantity, production schedule, packaging requirements, and customization details. Urgent orders can be discussed in advance.
