Comprehensive 25 ft mini split air conditioner installation kit with factory-insulated 1/4″ × 1/2″ copper lines and essential accessories — engineered to simplify HVAC installation and improve system efficiency.
The Mini Split Air Conditioner Kit is twin already. So buy it now.
Product Overview – Ready-to-Install Mini Split Line Set Kit
The 25 ft 1/4″ × 1/2″ mini split air conditioner kit includes pre-insulated refrigerant lines and all the key components needed for a professional installation of ductless & mini split AC systems. With flared copper line ends and quality insulation, this kit provides a reliable, easy-to-install solution for residential and light commercial HVAC work.
Factory-Insulated Copper Line Set for Thermal Performance
Includes a 25 ft pre-insulated copper line set with 1/4″ liquid line and 1/2″ suction line
Factory insulation reduces heat gain/loss and helps prevent condensation
Pre-flared ends with nuts ensure secure, leak-resistant connections during installation
Essential HVAC Installation Accessories Included
Communication wiring cable (typically sized to match kit length)
Condensate drain hose for managing moisture and runoff
Wall pipe sleeve and cover for neat and protected wall entry
Additional parts such as putty, protective caps, and mounting accessories may be included to help complete the install
Key Features & Benefits
Simplified Installation Process
This complete kit bundles refrigerant lines with the accessories needed to connect indoor and outdoor mini split units — saving time and reducing onsite labor compared with buying components separately.
Improved Energy Efficiency and System Protection
Pre-insulated lines help sustain refrigerant temperature, which can improve cooling efficiency and reduce energy waste. Proper insulation also helps limit moisture buildup and keeps condensate from damaging nearby surfaces.
Enhanced Durability & Compatibility
Made from 99.9% pure copper tubing compliant with HVAC standards, the line set resists corrosion and wear over extended operation. This kit fits many modern mini split and ductless AC systems requiring 25 ft line lengths.
Features of pipe insulation tubing:
![White PE Embossed insulated pipe]( "insulated pipe")
HVAC Applications & Compatibility
Designed for Ductless Mini Split & Split AC Systems
This installation kit is suitable for:
Mini split air conditioners
Ductless HVAC systems
Heat pumps
Residential and light commercial installations, where a 25 ft line distance between indoor and outdoor units is needed.
Compatible with Standard Refrigerants
Designed to be compatible with common refrigerants used in modern HVAC systems, such as R410A and R32, meeting normal pressure and performance specifications.
Technical Specifications
| Feature | Detail |
| Line Set Length | 25 ft (7.62 m) |
| Liquid Line Diameter | 1/4″ |
| Suction Line Diameter | 1/2″ |
| Material | 99.9% pure copper |
| Insulation | Factory-applied thermal insulation |
| Included Accessories | Communication wire, drain hose, wall pipe & cover, flare nuts |
| Applications | Mini split & ductless HVAC systems |
| Refrigerants | Compatible w/ R410A, R32, and similar refrigerants |
Installation Tips for Best Results
Plan Your Line Run Before Installing
Measure the distance between indoor and outdoor units before starting to ensure the 25 ft line set has sufficient length for a clean and corrosion-free route.
Protect Lines at Wall Penetrations
Use the included wall pipe and cover to protect the copper lines and insulation where they pass through walls — this maintains insulation integrity and provides a professional finish.
Secure Tubing Along the Run
Use clips or straps to secure the refrigerant tubing neatly along walls or ceilings — this helps prevent sagging, reduces vibration, and preserves insulation performance.
![copper pipe kit]( "Copper pipe kit")
Mini Split Air Conditioner Kit
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 |
1/4 + 3/8 Mini split installation kit used for 0.75TON - 1.0TON mini split air conditioner.
1/4 + 1/2 Mini split line set used for 1.5TON - 2.0TON mini split air conditioning.
1/4 + 5/8 Copper line set 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 Installation 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 piping 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.
All 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 Minis plit air conditioner kit used for 54000 BTU and 72000 split air conditioner installation.
3/8 + 7/8 Mini splitinstallation 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.
Mini split installation Kit 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 Insulated copper piping apply for 72K - 96K ductless mini split air conditioner.
Why Choose This 25 ft Mini Split Installation Kit
Complete, Ready-To-Install HVAC Solution
This kit includes everything you need in one package — pre-insulated line set, wiring, drain hose, and wall accessories — saving time and effort.
Quality Materials Ensure Long-Term Reliability
High-purity copper tubing and factory insulation provide strength, corrosion resistance, and thermal performance you can rely on over many cooling/heating cycles.
Ideal for Residential and Light Commercial Use
Whether installing a home mini split, replacing an existing line set, or setting up a light commercial HVAC, this kit delivers flexibility, performance, and ease of installation.
DABUND FACTORY
We produce Insulated Copper Pipe, Mini Split Line Set and Aluminum Pipe and HVAC Parts
![Dabund Factory]( "Dabund Factory")
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
![证书]( "证书")
Exhibition
We join the exhibitions all over the word, just to facilitate customers to experience our mini split line set face to face.
![2.jpg]( "2.jpg")
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 “1/4″ × 1/2″” refer to?
It refers to the outer diameters of the copper refrigerant lines — 1/4″ for the liquid line and 1/2″ for the suction line, a common configuration for mini split and ductless AC systems.
8.Is this installation kit suitable for outdoor use?
Yes — the factory-applied insulation and durable copper tubing make this kit appropriate for outdoor refrigerant runs between the indoor evaporator and outdoor condenser.
9.Do I need additional insulation on site?
No — this kit comes with pre-insulated refrigeration lines, eliminating the need for additional insulation wrapping in most applications.
10. What HVAC systems is this kit compatible with?
This kit works with most mini split and ductless AC systems requiring a 25 ft line, especially those with similar diameter requirements and standard refrigerants like R410A and R32.
