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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
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Color
Keywords
Application
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15 ft 3/8" x 3/4" Mini Split Installation Kit
The 15 ft 3/8" x 3/4" mini split installation kit is a complete HVAC line set kit designed for ductless mini split air conditioners, heat pumps and split AC installation projects.
This kit includes a pre-insulated copper refrigerant line set and essential installation accessories, helping HVAC contractors and experienced installers connect indoor and outdoor units quickly, cleanly and reliably.
Dabund supplies mini split installation kits, insulated copper line sets, HVAC refrigerant tubing and installation accessories for contractors, wholesalers, distributors, importers and OEM private-label buyers.
Product Overview: All-in-One HVAC Installation Solution
This 15 ft 3/8" x 3/4" mini split installation kit provides the key components needed to connect a compatible indoor evaporator unit and outdoor condenser unit.
It is designed for quick, reliable and professional HVAC installation with high-quality copper tubing, factory-applied insulation, communication wire, drain hose, wall pipe, wall cover and flare connection parts.
What Is Included in the 15 ft Mini Split Installation Kit?
| Component | Function |
| 3/8" Copper Refrigerant Line | Supports refrigerant flow in compatible mini split and split AC systems. |
| 3/4" Copper Refrigerant Line | Used as the matching larger refrigerant line in compatible HVAC systems. |
| Factory-Applied Insulation | Helps reduce heat gain, heat loss and surface condensation. |
| Communication Wire Cable | Supports indoor and outdoor unit communication where applicable. |
| Condensate Drain Hose | Directs condensate water safely away from the indoor unit. |
| Wall Pipe and Decorative Cover | Protects the wall opening and creates a cleaner installation finish. |
| Flare Nuts and Basic Fittings | Support secure refrigerant line connections during installation. |
Key Features of 15 ft 3/8" x 3/4" Mini Split Installation Kit
15 ft complete HVAC line set kit for mini split and ductless AC installation.
3/8" x 3/4" pre-insulated copper refrigerant line set for compatible HVAC systems.
Factory-applied black rubber insulation helps reduce condensation and thermal loss.
Includes communication wire, drain hose, wall pipe, wall cover, flare nuts and basic fittings.
99.9% pure copper tubing supports reliable refrigerant flow and long-term performance.
Black rubber insulation supports temperature performance from -40℃ to 120℃.
Suitable for indoor and outdoor HVAC installation when installed correctly.
Designed for residential, office and light commercial HVAC projects.
OEM package, logo printing and customized kit configuration are available.
Pre-Insulated Copper Refrigerant Line Set
3/8" Copper Line
The 3/8" copper line is used in compatible mini split and HVAC systems to support refrigerant circulation between indoor and outdoor units.
3/4" Copper Line
The 3/4" copper line is used as the matching larger refrigerant line in compatible split AC and ductless HVAC installations.
15 ft Length for Short-Range Installations
The 15 ft length is suitable for installations where the indoor and outdoor units are close together, reducing excess line length and helping create a cleaner installation route.
Key Benefits and Performance Advantages
Suitable for Mini Split and HVAC Systems
This 15 ft line set kit is suitable for a range of mini split, ductless heat pump and split AC systems where 3/8" x 3/4" copper line sizing is required.
High-Quality Copper Tubing
The kit uses 99.9% pure copper pipes engineered for excellent thermal conductivity, corrosion resistance and reliable refrigerant transfer.
Factory-Applied Insulation Saves Time
Factory-applied insulation eliminates most field wrapping work, helping installers save labor time and reduce insulation inconsistency.
Designed for Indoor and Outdoor Installations
UV-resistant and weather-capable insulation helps protect the copper line set during indoor passage and outdoor exposure.
99.9% Pure Copper
Black Rubber Insulated Pipe
Flaring
Black Rubber Pipe Insulation Features
Pipe insulation material: black rubber.
Temperature range from -40℃ to 120℃.
Closed-cell structure helps reduce moisture condensation.
Insulation material works as both a thermal insulation layer and moisture-proof layer.
No additional water vapor permeation protective layer is required in many standard installations.
Helps protect copper pipe from heat transfer, moisture, abrasion and outdoor exposure.
Technical Specifications
| Feature | Detail |
| Product Name | 15 ft 3/8" x 3/4" Mini Split Installation Kit |
| Length | 15 ft / approx. 4.57 m |
| Line Set Size | 3/8" x 3/4" |
| Copper Material | 99.9% pure copper tubing |
| Insulation | Factory-applied black rubber insulation |
| Included Accessories | Communication wire, drain hose, wall pipe, wall cover, flare nuts and basic fittings |
| Applications | Mini split AC, split air conditioner, heat pump and ductless HVAC systems |
| Customization | Length, insulation thickness, accessory configuration, logo printing and packaging available |
Installation Tips for Best Performance
Measure Distance Before Installation
Ensure the 15 ft length covers the total distance between indoor and outdoor units, with enough slack for routing and proper flare connection.
Avoid Sharp Bends and Kinks
Route the copper lines with smooth bends to maintain refrigerant flow and avoid damaging the tubing or insulation.
Protect Lines Through Wall Sections
Use the wall pipe and cover to prevent abrasion at the wall penetration point and create a polished installation appearance.
Follow Equipment Manufacturer Requirements
Confirm line size, line length, refrigerant type, flare connection, torque value and charge requirements with the mini split equipment manufacturer before installation.
Mini Split Installation Kit Size Options
| Size | Length | Insulation Black Rubber | Flame Resistant |
| 1/4 + 3/8 | 3 m / 4 m / 5 m / 7 m / 10 m | 8 mm / 9 mm / 10 mm / 13 mm / 19 mm / 25.4 mm | M1 / B1 |
| 1/4 + 1/2 | 3 m / 4 m / 5 m / 7 m / 10 m | 8 mm / 9 mm / 10 mm / 13 mm / 19 mm / 25.4 mm | M1 / B1 |
| 1/4 + 5/8 | 3 m / 4 m / 5 m / 7 m / 10 m | 8 mm / 9 mm / 10 mm / 13 mm / 19 mm / 25.4 mm | M1 / B1 |
| 3/8 + 5/8 | 3 m / 4 m / 5 m / 7 m / 10 m | 8 mm / 9 mm / 10 mm / 13 mm / 19 mm / 25.4 mm | M1 / B1 |
| 3/8 + 3/4 | 3 m / 4 m / 5 m / 7 m / 10 m | 8 mm / 9 mm / 10 mm / 13 mm / 19 mm / 25.4 mm | M1 / B1 |
| 1/2 + 3/4 | 3 m / 4 m / 5 m / 7 m / 10 m | 8 mm / 9 mm / 10 mm / 13 mm / 19 mm / 25.4 mm | M1 / B1 |
| 3/8 + 7/8 | 3 m / 4 m / 5 m / 7 m / 10 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 3/4" mini split installation kit is commonly used for larger split AC systems and many 54,000 BTU to 72,000 BTU applications. Final sizing should always follow the HVAC equipment manufacturer’s installation manual.
Why Choose This Mini Split Installation Kit?
Reduces Installation Time and Errors
Pre-insulated lines and included accessories reduce the time needed to assemble components on site and help minimize missing-part or mismatch errors.
Professional Quality for Contractors and Experienced Installers
The kit is designed for professional HVAC installation, delivering reliable performance and a clean, finished line set route.
OEM and Bulk Supply Available
Dabund supports custom line length, insulation thickness, accessory configuration, logo printing and private-label packaging for distributors and HVAC brands.
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 mini split installation kit?
A mini split installation kit is a set of components used to install ductless mini split air conditioners and heat pump systems. It usually includes insulated copper refrigerant lines and installation accessories.
What is included in this 15 ft 3/8" x 3/4" mini split installation kit?
It can include pre-insulated copper refrigerant lines, communication wire cable, condensate drain hose, wall pipe, wall cover, flare nuts and basic fittings.
What does 3/8" x 3/4" mean?
It refers to the outer diameters of the two copper refrigerant lines. The 3/8" and 3/4" tubing sizes are used in compatible split AC and mini split systems.
What AC capacity is 3/8" x 3/4" commonly used for?
The 3/8" x 3/4" line set is commonly used for larger split AC systems and many 54,000 BTU to 72,000 BTU applications, but final sizing must follow equipment specifications.
Is the refrigerant line set pre-insulated?
Yes. The copper lines come with factory-applied black rubber insulation to reduce energy loss, prevent condensation and protect the copper pipe.
Can this mini split installation kit be used outdoors?
Yes. The insulation materials are designed for indoor and outdoor HVAC installation, offering resistance to sunlight, moisture and temperature changes when installed correctly.
Is this kit compatible with R410A and R32 refrigerants?
Yes. Mini split installation kits can support modern refrigerants such as R410A and R32 when the copper tubing, pressure rating and installation match system requirements.
Can this 15 ft line set be shortened?
Yes. Copper refrigerant lines can be cut to the required length, but proper cutting, deburring, flaring, leak testing and sealing are required.
Does this kit help improve energy efficiency?
Yes. Properly insulated refrigerant lines help maintain refrigerant temperature, reduce heat gain or loss and support better cooling and heating performance.
Can Dabund customize mini split installation kits?
Yes. Dabund can customize pipe diameter, line length, insulation thickness, accessories, OEM branding and private-label packaging.
Are you a trading company or manufacturer?
Dabund is a manufacturer of mini split installation kits, insulated copper line sets, 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.
