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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
30 ft 3/8" x 7/8" HVAC Line Set
The 30 ft 3/8" x 7/8" HVAC line set is a premium copper AC line set designed for air conditioning, refrigeration, ductless mini split, heat pump and centralized HVAC applications.
This pre-insulated copper refrigerant tubing includes a 3/8" liquid line and 7/8" suction line with factory-applied black rubber insulation. It helps support stable refrigerant flow, reduce heat loss, control condensation and improve installation efficiency.
Dabund Pipe manufactures HVAC line sets, insulated copper pipe, mini split line sets and HVAC parts for contractors, wholesalers, distributors, importers and OEM private-label buyers.
Product Overview: 30 ft 3/8" x 7/8" HVAC Line Set
This 30 ft 3/8" x 7/8" HVAC line set is built for professional air conditioning and refrigeration installations that require reliable copper refrigerant tubing and durable insulation.
The 30 ft length is suitable for standard split AC installations, ductless mini split systems and heat pump projects where the indoor and outdoor units are moderately spaced apart.
Key Features of 30 ft 3/8" x 7/8" HVAC Line Set
30 ft HVAC line set for air conditioning and refrigeration applications.
3/8" liquid line and 7/8" suction line for compatible HVAC systems.
Metric outer diameter: 9.52 mm x 22.22 mm.
99.9% pure copper pipe meets ASTM B280 and C12200 standards.
Black rubber insulation helps reduce heat transfer and condensation.
Working temperature range from -40℃ to 120℃.
Pressure rating options from 2100 PSI to 7000 PSI.
Suitable for ductless mini split, heat pump, refrigeration and centralized air ducted units.
Insulation can be printed with company name, size, meters and private-label branding.
Specifications and Technical Details
| Specification | Detail |
| Product Name | 30 ft 3/8" x 7/8" HVAC Line Set |
| Length | 30 ft / approx. 9.14 m |
| Line Size | 3/8" x 7/8" |
| Metric Size | 9.52 mm x 22.22 mm |
| Copper Material | 99.9% pure copper |
| Copper Standard | ASTM B280 and C12200 |
| Insulation | Black rubber insulation / polypropylene insulation options |
| Temperature Range | -40℃ to 120℃ |
| Pressure Rating | 2100 PSI to 7000 PSI |
| Application | Air conditioning, refrigeration, mini split, heat pump and centralized HVAC systems |
Premium Copper Construction for HVAC Reliability
99.9% Pure Copper Pipe
The copper pipe is made from 99.9% pure copper and can meet ASTM B280 and C12200 standards for HVAC refrigerant tubing. High-purity copper provides strong thermal conductivity, pressure resistance and corrosion resistance.
3/8" x 7/8" Line Size
The 3/8" line is commonly used as the liquid line, while the 7/8" line is commonly used as the suction line in compatible larger HVAC systems. Final sizing should always follow the equipment manufacturer’s installation manual.
High Pressure Rating for Modern Refrigerants
Pressure rating options from 2100 PSI to 7000 PSI help support modern HVAC refrigerants such as R410A and R32 when installed according to system requirements and local HVAC codes.
99.9% Pure Copper
Black Rubber Insulated Pipe
Plastic Cap Protection
Black Rubber Insulation for HVAC Line Sets
The black rubber insulation helps protect copper refrigerant tubing from heat transfer, moisture condensation and installation wear. It also supports cleaner line routing in air conditioning and refrigeration systems.
Material: black rubber pipe insulation.
Temperature range from -40℃ to 120℃.
Closed-cell structure helps reduce condensation.
Insulation layer also works as a moisture-proof layer.
No additional vapor permeation protective layer is required in many standard installations.
Helps protect copper pipe and keep installation areas cleaner.
Insulation Performance Advantages
Excellent Heat Preservation
High-density closed-cell insulation has low thermal conductivity and helps maintain stable refrigerant temperature along the copper line.
Moisture Condensation Control
The insulation layer reduces surface condensation on cold refrigerant lines, helping prevent water dripping, mold risk and moisture damage around building materials.
Durable and Corrosion-Resistant Protection
The insulation helps protect the copper pipe from environmental exposure, moisture and mechanical contact, improving long-term line set durability.
Flame-Retardant Options
Insulation options can meet ASTM E84, UL94, ASTM D1056 and ASTM G21 requirements for HVAC applications and export markets.
Applications: HVAC, Air Conditioning and Refrigeration Systems
Ductless Mini Split Air Conditioners
This 30 ft 3/8" x 7/8" HVAC line set is suitable for connecting indoor and outdoor components in compatible ductless mini split systems.
Heat Pumps and Centralized AC Units
The line set can be used for heat pump installations, centralized air ducted units and larger split AC systems that require 3/8" and 7/8" refrigerant line sizes.
Refrigeration Line Runs
Pre-insulated copper tubing is also suitable for refrigeration applications where reliable refrigerant transfer, moisture protection and thermal stability are required.
30 ft HVAC Line Set for HVACR Wholesalers and Contractors
Dabund Pipe in-house tested insulated copper pipe and tubing is designed to make HVAC installation simple and quick, helping contractors save time and reduce cost on each job.
For distributors, importers and private-label HVAC brands, Dabund supports custom size, insulation thickness, logo printing, meter marking and export packaging.
HVAC Line Set Size Options
| Size | Length | Insulation Black Rubber | Flame Resistant |
| 1/4 + 3/8 | 15 m / 20 m / 25 m / 30 m / 50 m | 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 | 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 | 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 | 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 | 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 | 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 | 8 mm / 9 mm / 10 mm / 13 mm / 19 mm / 25.4 mm | M1 / B1 |
Recommended Applications by AC Capacity
| Line Set Size | Common AC Capacity | Typical BTU Range | Typical Application |
| 1/4 + 3/8 | 0.75 ton - 1.0 ton | 9,000 BTU - 12,000 BTU | Small mini split air conditioner |
| 1/4 + 1/2 | 1.5 ton - 2.0 ton | 12,000 BTU - 18,000 BTU | Residential mini split system |
| 1/4 + 5/8 | 2.0 ton - 2.5 ton | 24,000 BTU - 30,000 BTU | Split air conditioner system |
| 3/8 + 5/8 | 3.0 ton - 4.0 ton | 36,000 BTU - 48,000 BTU | Ductless mini split and heat pump |
| 3/8 + 3/4 | 4.5 ton - 6.0 ton | 54,000 BTU - 72,000 BTU | Larger split AC installation |
| 3/8 + 7/8 | 6.0 ton - 8.0 ton | 72,000 BTU - 96,000 BTU | Commercial ductless HVAC systems |
The 3/8" x 7/8" HVAC line set is commonly used for 6.0 ton to 8.0 ton ductless mini split systems and many 72,000 BTU to 96,000 BTU applications. Final sizing should always follow the HVAC equipment manufacturer’s requirements.
Why Choose 30 ft HVAC Line Set from Dabund Pipe?
Manufacturer Since 2008
Dabund Pipe has manufactured HVAC line sets, insulated copper pipe, aluminum pipe and HVAC parts since 2008, supporting global customers with production and export experience.
Individual Pre-Insulated Rolls
Individual pre-insulated rolls are designed to fit ductless mini splits, VRF systems, heat pumps and unitary HVAC system installations.
Quality Products with Competitive Pricing
Dabund supports HVAC wholesalers, contractors, installers and private-label buyers with stable supply, competitive pricing and professional export service.
OEM Printing and Custom Packaging
Dabund can print company name, size, meters and custom specifications on insulation and packaging to match distributor or brand requirements.
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, meeting ASTM E84, UL94, ASTM D1056 and ASTM G21 requirements.
Exhibition
Dabund joins HVAC exhibitions worldwide to present mini split line set and HVAC installation products to customers face to face.
FAQ
What is a 30 ft 3/8" x 7/8" HVAC line set used for?
It is used to connect indoor and outdoor units in air conditioning, refrigeration, mini split, heat pump and centralized HVAC systems that require 3/8" and 7/8" refrigerant lines.
What does 3/8" x 7/8" mean?
It refers to the outer diameters of the two copper refrigerant tubes. The 3/8" line is commonly the liquid line, and the 7/8" line is commonly the suction line in compatible systems.
What AC capacity is 3/8" x 7/8" commonly used for?
This line set size is commonly used for 6.0 ton to 8.0 ton ductless mini split systems and many 72,000 BTU to 96,000 BTU applications.
What is black rubber insulated pipe?
Black rubber insulated pipe is copper pipe covered with closed-cell black rubber insulation. It is designed to reduce heat transfer, prevent condensation and protect HVAC refrigerant lines.
Is black rubber insulation suitable for outdoor use?
Yes. High-quality black rubber insulation can be suitable for outdoor use when it is UV-resistant or protected with an additional coating, sleeve or line set cover.
What temperature range can black rubber insulated pipes handle?
Most black rubber insulated pipes operate effectively within approximately -40℃ to 120℃, making them suitable for cooling and heating HVAC applications.
Does black rubber insulation help prevent condensation?
Yes. Closed-cell black rubber insulation has low water vapor permeability, helping reduce condensation, dripping, mold risk and moisture-related damage.
Are black rubber insulated pipes compatible with R410A and R32?
Yes. They can be compatible with modern refrigerants such as R410A and R32 when the copper pipe meets applicable HVAC standards and the line set is installed correctly.
Can this HVAC line set be customized?
Yes. Dabund can customize pipe diameter, length, insulation thickness, printing, packaging and private-label requirements for HVAC distributors and project buyers.
Are you a trading company or manufacturer?
Dabund is a manufacturer of HVAC line sets, mini split line sets, insulated copper pipe, aluminum pipe and HVAC parts.
Can I get a free sample?
Yes. Dabund can provide qualified customers with free samples. Express cost may need to be covered by the buyer. You can request samples through the free sample page.
Can I print my logo?
Yes. Dabund accepts OEM and ODM orders, including logo printing, brand marking, size printing, meter marking and customized packaging.
What payment terms are available?
Payment terms may include T/T, L/C at sight, credit card and other agreed payment methods depending on order details.
What delivery terms can you offer?
Dabund can offer common international trade terms such as EXW, FOB, CFR and CIF.
How long is your delivery time?
Normal delivery time is usually 15 to 20 days. For urgent orders, production and shipment can be arranged according to factory schedule.
