Professional-grade 20 ft 1/4″ × 3/8″ mini split installation kit featuring pre-insulated copper refrigerant lines and essential accessories — engineered to simplify HVAC installations and deliver consistent performance in residential and light commercial applications.
The Mini Split Installation Kit is twin already. So buy it now.
Product Overview – All-In-One Mini Split Installation Solution
The 20 ft 1/4″ × 3/8″ mini split installation kit provides everything needed to connect an indoor evaporator unit to an outdoor condenser unit over a moderate line distance. Ideal for jobs where the indoor and outdoor units are separated by up to 20 ft, this kit includes factory-insulated refrigerant lines plus wiring, drain components, and protective elements for a professional finish.
Pre-Insulated Copper Refrigerant Line Set
1/4″ liquid line — carries refrigerant from the outdoor unit to indoor
3/8″ suction line — returns refrigerant vapor back to the outdoor unit
20 ft total length — suitable for medium-length runs
Factory insulation helps maintain refrigerant temperature and reduce condensation
Complete Installation Accessories Included
This installation kit includes:
Insulated copper refrigerant lines with flared ends and flare nuts
Communication wiring cable for indoor-outdoor unit connection
Drain hose for condensate removal
Wall pipe and cover for clean penetration
Necessary connectors and fittings for secure installation
Key Features & Benefits
Fast & Easy HVAC Installation
This pre-bundled kit saves time by eliminating the need to source individual components separately. Ideal for professionals and experienced DIY installers, it helps reduce installation complexity and support consistent results.
Factory-Applied Insulation Improves Efficiency
Factory-applied insulation helps preserve refrigerant temperature throughout the line run, leading to improved system efficiency and performance. It also helps control surface condensation in humid conditions.
Minimizes Condensation & Moisture Risks
Properly insulated refrigerant lines can significantly reduce sweating and dripping that might otherwise damage walls, ceilings, and floors — especially in high-humidity environments.
HVAC Compatibility & Applications
Designed for Mini Split & Ductless AC Systems
This installation kit is ideal for:
Mini split air conditioners
Ductless heat pump systems
Residential HVAC installations
Light commercial cooling and heat pump applications
The 20 ft line length works well for installations where the indoor and outdoor units are moderately spaced apart.
H3: Compatible With Standard HVAC Refrigerants
Engineered to work with commonly used refrigerants like:
Features of pipe insulation tubing:
![White PE Embossed insulated pipe]( "insulated pipe")
H2: Technical Specifications
| Feature | Specification |
| Line Set Length | 20 ft (≈6.10 m) |
| Liquid Line Diameter | 1/4″ (≈6.35 mm) |
| Suction Line Diameter | 3/8″ (≈9.52 mm) |
| Material | 99.9% Pure Copper |
| Insulation | Factory-applied thermal insulation |
| Included Accessories | Wiring cable, drain hose, wall pipe & cover |
| Applications | Mini split, ductless AC, heat pump installs |
| Compatible Refrigerants | R410A, R32, and similar |
Installation Tips for Best Results
Measure the Routing Path Before Installation
Before installing, measure the distance between the indoor and outdoor units to confirm that the 20 ft kit provides the correct reach and allows for gentle bends without over-stress on refrigerant lines.
Protect Insulation at Penetration Points
Use the included wall pipe and protective cover during wall penetrations to protect the line set insulation from abrasion and wear — maintaining thermal performance.
Secure Lines With Supports
Use HVAC-rated clips, straps, or brackets to secure the line set along its run. Proper support minimizes vibration, prevents sagging, and preserves insulation integrity over time.
![copper pipe kit]( "Copper pipe kit")
Mini Split Installation 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 line set kit used for 54000 BTU and 72000 split air conditioner installation.
3/8 + 7/8 Mini Split Installation 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 Line set kit 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 20 ft Mini Split Installation Kit
Complete Kit Includes Everything You Need
This kit combines all essential components — refrigerant lines, drain hose, wiring, wall pipe, and fittings — into one package, saving time and effort for HVAC professionals and DIYers.
Factory-Insulated for Reliable Performance
Quality insulation helps your HVAC system maintain consistent performance while reducing energy loss and condensation risk — especially important in hotter, more humid climates.
Perfect for Residential & Light Commercial Projects
Ideal for homes, apartments, condominiums, and light commercial spaces where moderate HVAC line runs are needed, this installation kit delivers reliability, performance, and convenience.
DABUND FACTORY
We produce Insulated Copper Pipe, Mini Split Line Set and Aluminum Pipe and HVAC Parts
![Factory Profile]( "Factory Profile")
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.
![TRADE SHOW PARTICIPATION]( "TRADE SHOW PARTICIPATION")
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.
Yes — the copper refrigerant lines come with factory-applied insulation that helps improve thermal performance and minimize condensation without additional field wrapping.
**H3: Can I use this kit outdoors?
Yes — the insulation is UV-resistant and weather-durable, making this kit suitable for outdoor line runs between indoor and outdoor HVAC units.
**H3: Is this kit compatible with R410A systems?
Yes — this installation kit is compatible with popular refrigerants like R410A when installed properly per manufacturer and local building codes.
