Professional-grade 15 ft 1/4″ × 3/8″ mini split installation kit combining pre-insulated copper refrigerant lines and essential installation accessories — designed to simplify ductless HVAC installation with consistent performance and reliable operation.
The Mini Split Installation Kit is twin already. So buy it now.
Product Overview – Ready-to-Install Mini Split Kit
The 15 ft 1/4″ × 3/8″ mini split installation kit delivers a complete solution for connecting indoor mini split units to outdoor condensers. It includes factory-insulated refrigerant lines with pre-flared ends and key hardware accessories, making this kit perfect for residential installs, service upgrades, and light commercial applications where efficiency and durability matter.
Pre-Insulated Copper Refrigerant Line Set
1/4″ liquid line for high-pressure refrigerant delivery
3/8″ suction line for low-pressure refrigerant return
Factory-applied insulation reduces heat gain/loss and minimizes condensation
Ideal for runs up to 15 ft between indoor and outdoor units
Complete HVAC Accessories Included
This installation kit includes:
Factory-insulated copper lines with flared ends and flare nuts
Communication wiring cable for indoor-to-outdoor signal connection
Drain hose for condensate removal
Wall pipe and protective cover for a clean, professional wall entry
Additional connectors and fittings to complete the installation
Key Features & Benefits
Simplifies HVAC Installation Process
The bundled kit eliminates the need to source individual components separately, saving time and reducing potential errors during installation. Perfect for HVAC professionals and knowledgeable DIY installers alike.
Factory Insulation Enhances Performance
Factory-applied insulation maintains consistent refrigerant temperature and efficiency, helping systems operate closer to peak performance without additional field insulation work.
Minimizes Condensation & Moisture Issues
Insulated refrigerant lines reduce surface condensation (“sweating”) which helps protect nearby walls, ceilings, and structural materials from moisture damage.
HVAC Compatibility & Applications
Designed for Mini Split & Ductless Systems
This installation kit works with:
Mini split air conditioners
Ductless heat pump systems
Residential HVAC systems
Light commercial HVAC installations
The 15 ft refrigerant line length makes it ideal for close-to-mid-range indoor-to-outdoor unit spacing.
Works with Standard HVAC Refrigerants
Compatible with common refrigerants such as R410A, R32, and other modern HVAC refrigerants when installed per manufacturer guidelines.
Features of pipe insulation tubing:
![White PE Embossed insulated pipe]( "insulated pipe")
Technical Specifications
| Specification | Detail |
| Line Set Length | 15 ft (~4.57 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 |
| Compatible Refrigerants | R410A, R32, and similar |
Installation Tips for Best Results
Measure Your Run Before Installing
— Determine the exact distance between indoor and outdoor units and plan the most efficient routing path.
— Proper planning helps avoid excessive bends that can restrict refrigerant flow or compress insulation.
Protect Insulation Through Wall Penetrations
— Use the included wall pipe and protective cover to keep the insulation intact where the lines pass through walls or siding.
— This ensures a neat installation and prevents insulation damage.
Secure Line Set With Clamps or Brackets
— Use clips, straps, or HVAC line supports along the refrigerant line run to prevent sagging and reduce vibration.
— Proper securing prolongs insulation lifespan and improves system performance.
![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 15 ft Mini Split Installation Kit
Complete, Time-Saving HVAC Solution
This kit provides all essential components for a successful installation — refrigerant lines, communication wiring, drain hose, and mounting accessories — in one package. That means fewer trips to the parts store and less guesswork on site.
Durable Materials & Dependable Performance
Constructed with high-purity copper and quality insulation, this kit is designed for long-lasting performance and reliable operation across seasonal HVAC demands.
Great for Residential & Light Commercial Projects
Whether you’re installing a mini split in a home, condominium, office space, or light commercial property, this 15 ft installation kit delivers versatility, ease of install, and performance you can trust.
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.
![Factory Profile]( "Factory Profile")
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″ × 3/8″” mean in this kit?
It refers to the outer diameters of the refrigerant lines — 1/4″ liquid line and 3/8″ suction line — a common size pairing used in many mini split installations.
8.Is this installation kit suitable for outdoor use?
Yes — the factory-applied insulation is weather-resistant and designed for line runs between indoor and outdoor units.
9.Do I need to add extra insulation on site?
No — this kit includes factory-insulated copper lines that meet typical HVAC insulation requirements, eliminating most need for field wrapping.
10.Is this kit compatible with R410A refrigerant systems?
Yes — this kit supports standard modern refrigerants like R410A and R32 when installed according to system and local code specifications.
