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DBJ-003
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DABUND
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Copper
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1M - 10M
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1/4 3/8 5/8 3/4 1/2 7/8 1-1/8
Material
Color
Keywords
Application
Usage
Thickness
Service
25 ft 3/8" x 5/8" Mini Split Installation Kit
The 25 ft 3/8" x 5/8" Mini Split Installation Kit is a complete HVAC line set kit designed for ductless mini split air conditioners, heat pump systems and light commercial HVAC installations.
This kit includes pre-insulated copper refrigerant lines, communication wire cable, condensate drain hose, wall pipe, wall cover and essential installation accessories. It helps HVAC contractors, distributors and installers complete mini split installation more efficiently.
The 3/8" x 5/8" copper line set size is commonly used for 3.0 ton to 4.0 ton ductless mini split and heat pump systems, including 36,000 BTU to 48,000 BTU HVAC applications. Final line size should always follow the equipment manufacturer’s installation manual.
What is a Mini Split Installation Kit?
A mini split installation kit is a set of components used to connect the indoor and outdoor units of a ductless mini split air conditioner or heat pump. It usually includes insulated copper refrigerant lines, drain hose, communication cable, wall sleeve and installation fittings.
Compared with sourcing parts separately, a complete HVAC line set kit helps improve component matching, reduce missing parts, save installation time and create a cleaner final installation.
What’s Included in This 25 ft 3/8" x 5/8" Kit?
| Component | Description |
| 3/8" Copper Line | Refrigerant liquid line for compatible mini split and HVAC systems. |
| 5/8" Copper Line | Suction line for refrigerant return gas flow. |
| Factory-Applied Insulation | White PE or black rubber insulation for thermal protection and condensation control. |
| Communication Wire Cable | Used for indoor and outdoor unit signal connection. |
| Condensate Drain Hose | 3 m drain hose for indoor unit condensate drainage. |
| Wall Pipe and Cover | Protects the wall pass-through and improves the finished installation appearance. |
| Flare Nuts and Basic Fittings | Helps reduce field preparation time during installation. |
Key Features of 25 ft 3/8" x 5/8" Mini Split Installation Kit
25 ft / 7.62 m mini split installation kit for ductless AC and heat pump systems.
3/8" liquid line and 5/8" suction line for compatible HVAC applications.
Pre-insulated copper refrigerant pipes help reduce condensation and thermal loss.
Includes communication wire cable, drain hose, wall pipe and wall cover.
99.9% pure copper tubing for reliable refrigerant transport.
Copper pipes meet ASTM B280 and C12200 standards.
Insulation options include white PE and black rubber.
Insulation thickness options include 8 mm, 9 mm, 10 mm, 13 mm, 19 mm and 25.4 mm.
UV-resistant and flame-retardant insulation options are available.
Suitable for HVAC contractors, distributors, wholesalers and installation kit suppliers.
Why Choose This 3/8" x 5/8" HVAC Line Set Kit?
Widely Compatible with Mini Split Systems
The 3/8" x 5/8" line set size is commonly used for 3.0 ton to 4.0 ton ductless mini split and heat pump systems. It is also suitable for many 36,000 BTU and 48,000 BTU air conditioner installations, depending on equipment requirements.
High-Quality Copper and Insulation Materials
The copper pipes are made from 99.9% pure copper and meet ASTM B280 and C12200 standards for HVAC refrigerant lines. The insulation materials can meet ASTM E84, UL94, ASTM D1056 and ASTM G21 requirements.
Designed for Durable HVAC Performance
Factory-applied insulation protects refrigerant lines from heat transfer, moisture, UV exposure and outdoor weather. This supports stable system performance and longer line set service life.
Faster and Cleaner Installation
Pre-insulated pipes, included accessories and compatible fittings help reduce field preparation work. This makes the kit useful for professional HVAC installers and experienced installation teams.
99.9% Pure Copper
White PE Insulated Pipe
Copper Nut
Features of Pipe Insulation Tubing
The insulation tubing is designed to protect the copper refrigerant lines from temperature loss, condensation and outdoor exposure. White PE insulation and black rubber insulation options are available for different HVAC installation environments.
Thermal Insulation Pipe Production
Insulation Pipe Warehouse
Inner Layer Insulated Pipe
Technical Specifications
| Item | Specification |
| Model | DBJ-003 |
| Brand | DABUND |
| Length | 25 ft / 7.62 m |
| Line Size | 3/8" x 5/8" |
| Copper Material | 99.9% pure copper tubes |
| Copper Standards | ASTM B280, C12200 |
| Insulation Options | White PE or black rubber |
| Application | Mini split, ductless HVAC and heat pumps |
| Accessories Included | Communication wire, drain hose, wall pipe, wall cover and flare nuts |
25 ft 3/8" x 5/8" Mini Split Installation Kit for HVACR Wholesalers
Dabund Pipe supplies in-house tested mini split installation kits for HVACR applications. The kit is designed to make installation simple and quick, helping contractors save time and reduce missing-part issues on each job.
This product is suitable for HVAC wholesalers, distributors, contractors, service companies and private-label brands that need complete mini split line set kits for professional installation markets.
Mini Split Installation Kit Size Options
| Size | Length | Insulation White PE | Flame Resistant |
| 1/4 + 3/8 | 3m / 4m / 5m / 7m / 10m | 8mm / 9mm / 10mm / 13mm / 19mm / 25.4mm | M1 / B1 |
| 1/4 + 1/2 | 3m / 4m / 5m / 7m / 10m | 8mm / 9mm / 10mm / 13mm / 19mm / 25.4mm | M1 / B1 |
| 1/4 + 5/8 | 3m / 4m / 5m / 7m / 10m | 8mm / 9mm / 10mm / 13mm / 19mm / 25.4mm | M1 / B1 |
| 3/8 + 5/8 | 3m / 4m / 5m / 7m / 10m | 8mm / 9mm / 10mm / 13mm / 19mm / 25.4mm | M1 / B1 |
| 3/8 + 3/4 | 3m / 4m / 5m / 7m / 10m | 8mm / 9mm / 10mm / 13mm / 19mm / 25.4mm | M1 / B1 |
| 1/2 + 3/4 | 3m / 4m / 5m / 7m / 10m | 8mm / 9mm / 10mm / 13mm / 19mm / 25.4mm | M1 / B1 |
| 3/8 + 7/8 | 3m / 4m / 5m / 7m / 10m | 8mm / 9mm / 10mm / 13mm / 19mm / 25.4mm | 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 |
Installation Tips for Best HVAC Performance
Prepare the Line Path Before Setup
Measure the required line length before installation and confirm the path for refrigerant lines, communication wiring and drain hose. Avoid sharp bends, excessive tension and obstruction points.
Protect the Wall Penetration
Use the wall pipe and cover to protect the pass-through area and create a cleaner appearance. Proper sealing also helps reduce air leakage, water entry and wall damage.
Maintain Proper Drain Hose Routing
The drain hose should be routed with a suitable downward slope to help condensate water discharge smoothly and reduce the risk of water leakage.
Follow Equipment Manufacturer Requirements
Always confirm line size, maximum line length, flare connection, refrigerant charge and installation method according to the mini split manufacturer’s manual.
Why Choose DABUND Mini Split Installation Kits?
Manufacturing Experience and Quality Control
DABUND has extensive experience producing HVAC copper products, mini split line sets, insulated copper pipes and installation accessories for global HVAC customers.
Competitive Pricing and OEM Support
Dabund supports B2B customers with competitive pricing, flexible OEM and ODM options, custom packaging and private-label supply for HVAC distributors and wholesalers.
Complete Kit for Efficient Installation
A complete installation kit reduces the need to purchase separate parts, improves installation compatibility and helps installers complete the project faster.
DABUND Factory
We produce insulated copper pipe, mini split line set, aluminum pipe and HVAC parts.
SGS Certificate
Mini split line set insulation can be made with polypropylene or black rubber with UV resistance, meeting ASTM E84, UL94, ASTM D1056 and ASTM G21 requirements.
Exhibition
We join HVAC exhibitions worldwide to help customers experience our mini split line set and installation kit products face to face.
FAQ
What is a mini split installation kit?
A mini split installation kit is a complete set of components used to install ductless mini split air conditioners and heat pump systems. It usually includes pre-insulated copper refrigerant lines and essential accessories for connecting indoor and outdoor units.
What is included in this 25 ft 3/8" x 5/8" mini split installation kit?
This kit can include 3/8" and 5/8" pre-insulated copper refrigerant lines, communication wire cable, condensate drain hose, wall pipe, wall cover, flare nuts and basic fittings.
What AC capacity is 3/8" x 5/8" commonly used for?
The 3/8" x 5/8" line set is commonly used for 3.0 ton to 4.0 ton ductless mini split air conditioners and heat pump systems, typically 36,000 BTU to 48,000 BTU applications.
Are mini split installation kits compatible with all brands?
Many kits are designed for broad compatibility with major ductless AC and heat pump brands. However, line size, length and connection requirements should always be confirmed with the equipment manufacturer’s installation manual.
What type of copper is used in this kit?
The kit uses 99.9% pure copper tubing that meets HVAC refrigerant line standards such as ASTM B280 and C12200.
Is the refrigerant line set pre-insulated?
Yes. The copper lines come with factory-applied insulation to reduce energy loss, prevent condensation and protect the copper pipes from outdoor exposure.
Can this mini split installation kit be used outdoors?
Yes. The insulation materials are designed for indoor and outdoor installation environments, with options for UV resistance, moisture resistance and weather protection.
Is this kit compatible with R410A and R32 refrigerants?
Yes. The copper line set is suitable for modern refrigerants such as R410A, R32 and other commonly used HVAC refrigerants, subject to the system manufacturer’s requirements.
Are mini split installation kits easy to install?
The kit is designed to reduce installation time through pre-insulated pipes, included accessories and compatible fittings. Installation should still be completed by qualified HVAC professionals or experienced installers.
Can mini split installation kits be customized?
Yes. Dabund supports custom pipe diameters, lengths, insulation thicknesses, insulation materials, OEM branding, private labeling and custom packaging.
Why choose a complete mini split installation kit instead of separate parts?
A complete kit helps improve component compatibility, reduce missing parts, save purchasing time and support a cleaner, more professional HVAC installation.
Can I get a free sample?
Yes. Dabund can provide qualified customers with free samples. Express shipping cost may need to be covered by the buyer.
What is the production time?
Standard production time is usually 15 to 20 days. Existing samples can be prepared faster, while customized samples may require additional time.
