Professional 25 ft mini split air conditioner installation kit with pre-insulated 3/8″ × 3/4″ copper refrigerant line set and essential accessories — designed for efficient and reliable HVAC installation with improved performance.
Product Overview – All-In-One HVAC Line Set & Installation Kit
The 25 ft 3/8″ × 3/4″ mini split air conditioner kit combines factory-insulated copper lines and installation accessories to streamline ductless HVAC setups. Perfect for connecting indoor evaporator units and outdoor condensers in residential and light commercial applications.
Pre-Insulated Copper Line Set for Thermal Efficiency
Includes 3/8″ liquid line and 3/4″ suction line with factory-applied insulation
Minimizes heat gain/loss for improved efficiency
Prevents surface condensation and moisture drips
Complete Accessories for Quick Installation
Communication wiring cable for indoor–outdoor signal connection
Condensate drain hose to handle moisture from HVAC operation
Wall pipe sleeve and cover for smooth and protected line entry
Flare nuts & basic fittings for secure, leak-resistant refrigerant connections
Key Features & Benefits
Simplifies HVAC Installation & Saves Labor Time
This kit bundles essential components, eliminating the need to source parts separately and reducing installation complexity, time, and potential errors.
Improve HVAC System Efficiency
Factory-insulated copper lines help maintain stable refrigerant temperatures, which can improve the overall energy efficiency of cooling and heating operation.
Reduces Condensation & Protects Interiors
Pre-insulated tubing prevents surface condensation, protecting surrounding surfaces such as walls and ceilings from moisture buildup and potential damage.
Features of pipe insulation tubing:
● Pipe Insulation, Material Black Rubber, Temp Range -40 Degrees to 120 Degrees.
● The pipe insulation has a better function of moisture condensation. Insulation material is both the insulation layer and moisture-proof layer.
● There is no need to drop the water vapor permeation protective layer so that it has a better moisture condensation function.
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HVAC Compatibility & Applications
Designed for Mini Split & Ductless AC Systems
This installation kit supports a wide range of HVAC applications, including:
Ideal for systems where the indoor and outdoor units are separated by approximately 25 ft.
Works with Modern Refrigerants
Compatible with common HVAC refrigerants such as R410A, R32, and other industry-standard refrigerant types used in mini split and ductless systems.
Technical Specifications
| Feature | Detail |
| Line Set Length | 25 ft (7.62 m) |
| Liquid Line Size | 3/8″ |
| Suction Line Size | 3/4″ |
| Material | 99.9% Pure Copper |
| Insulation | Factory-applied, UV-resistant |
| Included Accessories | Communication wire, drain hose, wall pipe & cover, flare fittings |
| Application | Mini split, ductless AC, heat pump systems |
| Refrigerants | R410A, R32, and similar refrigerants |
Installation Tips for Optimal Performance
Plan the Line Routing Before Starting
Measure the total path between indoor and outdoor units before beginning, avoiding sharp bends or tight turns that can impede refrigerant flow or damage insulation.
Protect Insulation at Wall Penetrations
Use the included wall pipe sleeve and cover to protect insulation where the line set passes through walls — this prevents abrasion and maintains insulation integrity.
Secure Tubing With HVAC Line Supports
Use clips, straps, or brackets to secure the line set along its run. Proper support reduces vibration, sagging, and insulation stress over time.
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Mini Split Air Conditioner Kit
Size | Length | Insulation Black Rubber | 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 |
1/4 + 3/8 Mini split air conditioner kit used for 0.75TON - 1.0TON mini split air conditioner.
1/4 + 1/2 Insulated copper line set used for 1.5TON - 2.0TON mini split air conditioning.
1/4 + 5/8 Insulated copper piping used for 2.0TON - 2.5TON split air conditioner system.
3/8 + 5/8 Insulated copper tube apply for 3.0TON - 4.0TON ductless mini split air conditioner.
3/8 + 3/4 Insulated copper tubing used for 4.5TON - 6.0TON split air conditioner installation.
3/8 + 7/8 Insulated copper piping apply for 6.0TON - 8.0TON ductless mini split air conditioner.
Air conditioning copper line sets 1/4 + 3/8 used for 0.75P and 1P split air conditioning.
Copper pipe kit 1/4 + 1/2 commonly used for 1.5P and 2P mini split air conditioners.
1/4 + 5/8 Mini split air conditioner Kit used for 2P and 2.5air conditioner system.
3/8 + 5/8 Mini-split copper line set apply for 3P and 4P ductless mini split air conditioner.
3/8 + 3/4 Copper pipe kit used for 4.5P and 6P split aircon installation.
3/8 + 7/8 Insulated copper pipe apply for 6P - 8p TON ductless mini split air conditioner.
1/4 + 3/8 Mini split line set used for 9000BTU and 12000 BTU split air conditioner.
Copper line set 1/4 + 1/2 commonly used for 12000 BTU and 18000 BTU mini split air conditioners.
1/4 + 5/8 Insulated copper line set used for 24000 BTU and 30000 BTU air conditioner system.
3/8 + 5/8 Mini-split line set apply for 36000 BTU and 48000 ductless air conditioner.
3/8 + 3/4 Mini split air conditioner used for 54000 BTU and 72000 split air conditioner installation.
3/8 + 7/8 Mini split air conditioner kit apply for 72000 BTU - 96000 BTU ductless mini split air conditioner.
Aircon copper line set 1/4 + 3/8 used for 9K and 12K split air conditioner.
High quality copper line set 1/4 + 1/2 commonly used for 12K and 18K mini split air conditioners.
1/4 + 5/8 Insulated copper line set used for 24K and 30K air conditioner system.
3/8 + 5/8 Mini-split line set apply for 36K and 48K ductless air conditioner.
3/8 + 3/4 Mini split air conditioner used for 54K and 72K split air conditioner installation.
3/8 + 7/8 Mini split air conditioner kit apply for 72K - 96K ductless mini split air conditioner.
H2: Why Choose This Mini Split Air Conditioner Kit?
H3: Complete, Ready-to-Use HVAC Installation Solution
This kit includes everything needed for a professional mini split or ductless AC installation — lines and accessories — saving time and simplifying the process.
H3: Quality Materials for Long-Term Reliability
With 99.9% pure copper refrigerant lines and factory-insulated protection, this kit delivers dependable performance and long-lasting durability.
H3: Ideal for Residential & Light Commercial Projects
Whether for a home, apartment, office, or other light commercial properties, this installation kit provides flexibility and reliability for HVAC projects of varying scales.
DABUND FACTORY
We produce Insulated Copper Pipe, Mini Split Line Set and Aluminum Pipe and HVAC Parts
![DABUND FACTORY COPPER LINE SET PACKAGE]( "DABUND FACTORY COPPER LINE SET PACKAGE")
SGS Certificate
Mini Split Line Set is made of Polypropylene or Black Rubber with UV Resistant, meets ASTM E 84, UL94, ASTM D1056 and ASTM G 21
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Exhibition
We join the exhibitions all over the word, just to facilitate customers to experience our mini split line set face to face.
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FAQ
1.Q:What is your payment terms?
A:TT,L/C AT SIGHT,CREDIT CARD etc
2.Q:What is your delivery terms?
A:EXW, FOB, CFR, CIF etc
3.Q:Are you trading company or manufacturer?
A:Manufacturer
4.Q:May I get a sample?
A:Yes, we can send you 3pieces free samples.
You just charge for the express cost is ok.
5.Q:Can I print my logo?
A:Yes of cause, we accept OEM and ODM.
6.Q:How long is your delivery time?
A:Usually 15-20days, if urgent, we can arrange to do in advance and delivery fast.
7.What does “3/8″ × 3/4″” mean in this kit?
It refers to the outer diameters of the refrigerant lines: 3/8″ for the liquid line and 3/4″ for the suction line, typical sizes used in many mini split and ductless HVAC systems.
8.Is additional insulation needed on site?
No — this kit includes factory-applied insulation on both refrigerant tubes, eliminating the need for extra field insulation in most installations.
9.Can this kit be used outdoors?
Yes — the insulation on the line set is UV-resistant and weather-durable, making it suitable for outdoor refrigerant runs.
10.Is this kit compatible with R410A and R32 refrigerants?
Yes — this product is compatible with common modern refrigerants such as R410A, R32, and similar HVAC refrigerants meeting typical system pressure specifications.
