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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 1/2" Refrigeration Copper Pipe for Mini Split AC Systems
The DABUND 75 ft 1/4" x 1/2" refrigeration copper pipe is an insulated HVAC copper line set designed for mini split AC systems, heat pumps, residential HVAC applications, and light commercial refrigeration installations. It supports efficient refrigerant transfer, high pressure resistance, condensation protection, and long-term system reliability.
This pre-insulated copper line set includes a 1/4" liquid line and a 1/2" suction line. It is commonly used for 12,000–18,000 BTU mini split systems when the air conditioner manufacturer specifies this pipe size and line length.
Product Overview – 75 ft Insulated Copper Pipe for HVAC and Refrigeration
This refrigeration copper pipe consists of twin copper tubes, including one liquid line and one suction line, with factory-applied insulation to improve thermal efficiency and simplify installation. The 75 ft length provides more routing flexibility for medium-distance indoor-to-outdoor unit connections.
Manufactured from 99.9% pure copper with C12200 copper grade support and ASTM B280 compliance according to specification, the line set provides excellent heat transfer, corrosion resistance, pressure resistance, and reliable long-term HVAC performance.
Liquid line: 1/4" / 6.35 mm
Suction line: 1/2" / 12.7 mm
Length: 75 ft / approximately 22.86 m
Material: 99.9% pure copper
Insulation: black rubber / PE / polypropylene options
Application: mini split AC, heat pump, HVAC, and refrigeration systems
Key Features of 1/4" x 1/2" 75 ft Refrigeration Copper Pipe
99.9% Pure Copper for Superior Heat Transfer
High-purity copper provides excellent thermal conductivity, stable refrigerant flow, reduced energy loss, corrosion resistance, and long-lasting durability. It is the core refrigerant circulation path for mini split AC and HVAC systems.
ASTM B280 and C12200 Copper Tubing Support
The copper tubing can be produced according to ASTM B280 refrigeration tubing requirements and C12200 DHP copper grade specifications, helping meet professional HVAC and refrigeration installation standards.
High Pressure Rating for Modern Refrigerants
With a pressure rating range of 2100–7000 PSI according to specification, this insulated copper line set can support modern refrigerants such as R410A and R32 when the pipe size, wall thickness, pressure rating, and system requirements match.
Standard Size for Medium-Capacity HVAC Systems
The 1/4" + 1/2" copper line set is commonly used for 12,000–18,000 BTU mini split AC systems. Installers should always confirm the correct line set size, maximum line length, and refrigerant charge requirements from the equipment manufacturer’s installation manual.
75 ft Length for Flexible Installation
The extended 75 ft design allows flexible routing, medium-distance installations, and fewer pipe extensions. It is suitable for residential and light commercial projects where the indoor and outdoor units are installed farther apart.
99.9% Pure Copper
Black Rubber Insulated Pipe
Plastic Cap Protection
Pipe Insulation Tubing Features
The pipe insulation is designed to protect refrigerant copper lines from heat loss, condensation, moisture, UV exposure, and outdoor wear. Black rubber insulation can act as both the insulation layer and moisture-proof layer, helping reduce condensation risk in HVAC applications.
Material option: black rubber insulation
Temperature range: -40°C to 120°C
Better moisture condensation protection
Insulation layer and moisture-proof layer combined in one structure
No additional vapor permeation protective layer required in many HVAC applications
Advanced Insulation Technology
UV-Resistant and Flame-Retardant Insulation
The insulation can meet ASTM E84, UL94, ASTM D1056, and ASTM G21 requirements according to selected material and specification. It supports a working temperature range from -40°C to 120°C and is suitable for indoor and outdoor environments.
High-Density Insulation Structure
The high-density insulation structure works as a thermal shield around the copper line set, helping maintain refrigerant temperature and reduce thermal loss during HVAC operation.
Outer layer: UV-resistant PE film
Middle layer: high-density foam insulation
Inner layer: closed-cell moisture barrier
Condensation and Energy Loss Prevention
The insulation helps prevent condensation buildup, reduce thermal loss, protect copper pipes from moisture damage, and improve overall HVAC efficiency. This is especially useful for 75 ft medium-distance line set installations.
Applications – Where This Refrigeration Copper Pipe Is Used
Mini Split Air Conditioning Systems
Suitable for residential ductless mini split AC installations where a 1/4" liquid line and 1/2" suction line are specified.
Heat Pump Systems
Supports compatible heat pump systems for both heating and cooling operation when the line size and installation distance meet equipment requirements.
Residential and Commercial HVAC Systems
Used in homes, offices, retail spaces, apartments, and light commercial HVAC projects requiring insulated copper refrigerant piping.
Mini split AC systems
Ductless heat pumps
Residential HVAC systems
Light commercial cooling projects
Refrigeration applications where specification matches
Technical Specifications
| Parameter | Details |
|---|---|
| Product Name | 75 ft 1/4" x 1/2" Refrigeration Copper Pipe |
| Product Type | Insulated HVAC copper line set / refrigeration copper pipe |
| Size | 1/4" liquid line + 1/2" suction line |
| Length | 75 ft / approximately 22.86 m |
| Material | 99.9% pure copper |
| Copper Standard | ASTM B280 / C12200 |
| Pressure Rating | 2100–7000 PSI, according to specification |
| Temperature Range | -40°C to 120°C |
| Insulation | UV-resistant polypropylene / PE / black rubber options |
| Common Capacity | 12,000–18,000 BTU mini split systems, depending on equipment requirements |
| Application | Mini split AC, heat pump, HVAC, and refrigeration systems |
Refrigeration Copper Pipe Size Options
| 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 |
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 mini 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 AC installation |
| 3/8 + 7/8 | 6.0 ton – 8.0 ton / 6P – 8P | 72000–96000 BTU / 72K–96K | High-capacity ductless HVAC system |
Why Choose This Refrigeration Copper Pipe from DABUND?
HVAC Manufacturing Experience Since 2008
DABUND is an experienced manufacturer specializing in HVAC copper products, insulated copper pipes, mini split line sets, aluminum pipes, and HVAC parts for global customers.
In-House Insulation Production
In-house insulation production helps ensure stable insulation quality, faster production cycles, consistent delivery, and flexible custom branding capability.
Stable insulation quality control
Faster production cycles
Custom branding capability
OEM and Custom Branding Available
DABUND supports OEM and ODM services for distributors, wholesalers, contractors, importers, and HVAC brands.
Logo printing
Pipe markings
Custom packaging
Custom insulation thickness
Custom line set length and pipe size combinations
Strong Global Supply Capability
DABUND supports regular container shipments, reliable delivery timelines, scalable production, and bulk supply for international HVAC buyers.
Installation Tips for Best Performance
Plan Pipe Routing Carefully
Avoid unnecessary bends and plan a smooth routing path to maintain refrigerant flow efficiency and reduce pressure drop.
Maintain Proper Bend Radius
Sharp bends can damage copper tubing, reduce refrigerant flow, and affect system performance. Use proper bending tools and methods during installation.
Keep Pipe Ends Sealed
Keep pipe ends sealed before connection to prevent dust, moisture, and contamination from entering the copper line set.
Ensure Proper Brazing and Connections
Leak-free joints are critical for HVAC reliability. Follow manufacturer requirements for connection, pressure testing, vacuuming, and refrigerant charging.
Confirm Maximum Line Length and Refrigerant Charge
For 75 ft installations, confirm the equipment’s maximum line length, elevation limit, and additional refrigerant charge requirements before installation.
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, refrigeration copper pipes, and HVAC parts face to face.
FAQ
What is a 75 ft 1/4" x 1/2" refrigeration copper pipe used for?
It is used as an insulated HVAC copper line set to connect indoor and outdoor units in mini split AC systems, heat pumps, and compatible refrigeration applications.
What system capacity is this pipe suitable for?
The 1/4" x 1/2" line set is typically used for 12,000–18,000 BTU mini split systems. Final selection should follow the HVAC equipment manufacturer’s installation manual.
Can this refrigeration copper pipe handle high-pressure refrigerants?
Yes. It can support refrigerants such as R410A and R32 when the copper tube size, wall thickness, pressure rating, installation length, and system requirements match.
Is this pipe suitable for outdoor use?
Yes. The insulation is designed for UV resistance, moisture protection, condensation control, and outdoor durability according to selected product specification.
Does it come pre-insulated?
Yes. Factory-applied insulation improves energy efficiency, reduces installation work, provides more consistent insulation quality, and helps prevent condensation.
Why is insulation important for a 75 ft copper line set?
Longer line sets are more exposed to heat gain, heat loss, and condensation risk. Proper insulation helps maintain refrigerant temperature and supports stable HVAC operation.
What standards can this copper line set 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.
Do you support OEM customization?
Yes. DABUND supports OEM and ODM customization, including logo printing, pipe markings, insulation thickness, insulation material, custom length, and private label packaging.
What are your payment terms?
Payment terms can include TT, L/C at sight, credit card, and other agreed payment methods depending on order details and customer requirements.
What are your delivery terms?
Delivery terms can include EXW, FOB, CFR, CIF, and other international trade terms according to buyer logistics requirements.
Are you a trading company or manufacturer?
DABUND is a manufacturer of insulated copper pipe, mini split line sets, aluminum pipe, and HVAC parts.
Can I get a sample before bulk order?
Yes. DABUND can send 3 pieces of free samples. The buyer only needs to cover the express cost.
How long is your delivery time?
Normal delivery time is usually 15–20 days. For urgent orders, DABUND can arrange production and delivery in advance when capacity allows.
