-
DBJ-003
-
DABUND
-
Copper
-
1M - 10M
Material
Color
Keywords
Application
15 ft 1/4" x 3/8" Mini Split Installation Kit
The 15 ft 1/4" x 3/8" mini split installation kit is a complete HVAC line set and accessories package designed for ductless mini split air conditioners, heat pump systems, residential HVAC installations and light commercial projects.
This kit combines factory-insulated copper refrigerant lines, flared ends, flare nuts, communication wiring cable, drain hose, wall pipe, wall cover and key installation accessories to simplify indoor-to-outdoor mini split connection.
The 1/4" liquid line and 3/8" suction line configuration is commonly used for small mini split systems, including many 9,000 BTU to 12,000 BTU air conditioner installations. Final compatibility should always follow the equipment manufacturer’s installation manual.
Product Overview: Ready-to-Install Mini Split Kit
The 15 ft 1/4" x 3/8" mini split installation kit provides a ready-to-install solution for connecting indoor mini split units to outdoor condensers. It is suitable for residential installations, replacement projects, service upgrades and compact HVAC line runs.
Factory-applied insulation helps reduce heat gain, heat loss and surface condensation. Pre-flared copper ends and included flare nuts help reduce field preparation work and improve installation efficiency.
What’s Included in This 15 ft Mini Split Installation Kit?
| Component | Description |
| 1/4" Copper Line | Liquid line for high-pressure refrigerant delivery in compatible mini split systems. |
| 3/8" Copper Line | Suction line for low-pressure refrigerant return to the outdoor compressor. |
| Factory-Applied Insulation | Helps reduce thermal loss, condensation and field insulation work. |
| Flared Ends and Flare Nuts | Prepared copper pipe ends for faster HVAC connection. |
| Communication Wiring Cable | Used for indoor-to-outdoor signal connection. |
| Drain Hose | Used for condensate water removal from the indoor unit. |
| Wall Pipe and Cover | Protects wall penetration and improves the finished appearance. |
| Additional Fittings | Connectors and accessories for completing the mini split installation. |
Key Features of 15 ft 1/4" x 3/8" Mini Split Installation Kit
15 ft / 4.57 m complete HVAC line set kit for mini split installation.
1/4" liquid line and 3/8" suction line for compatible ductless AC systems.
Factory-insulated copper refrigerant lines help reduce energy loss and condensation.
Flared ends and flare nuts help simplify installation.
Includes wiring cable, drain hose, wall pipe, wall cover and installation accessories.
99.9% pure copper tubing for reliable refrigerant flow.
Suitable for residential HVAC, light commercial HVAC and heat pump systems.
Compatible with common refrigerants such as R410A and R32 when installed correctly.
White PE insulation thickness options are available for different project requirements.
OEM branding, custom packaging and bulk supply are available for distributors.
Pre-Insulated Copper Refrigerant Line Set
1/4" Liquid Line
The 1/4" copper tube is used as the liquid line in many mini split installations. It carries high-pressure refrigerant from the outdoor condenser toward the indoor evaporator coil.
3/8" Suction Line
The 3/8" copper tube is used as the suction line in compatible systems. It returns low-pressure refrigerant vapor from the indoor unit to the outdoor compressor.
Factory Insulation for Better Performance
Factory-applied insulation helps maintain refrigerant temperature, reduce heat transfer and minimize pipe sweating. This improves installation consistency and reduces the need for additional field wrapping.
Complete HVAC Accessories Included
This kit includes core HVAC accessories needed for a clean mini split installation. Bundling refrigerant lines, wiring, drain hose and wall pass-through accessories helps reduce sourcing time and missing-part issues during installation.
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 wall entry.
Additional connectors and fittings for installation support.
Key Benefits for Mini Split Installation
Simplifies the HVAC Installation Process
The bundled kit eliminates the need to source individual parts separately. This saves purchasing time, reduces installation errors and helps HVAC professionals complete jobs more efficiently.
Factory Insulation Enhances Performance
Factory-applied insulation maintains consistent refrigerant temperature and helps the system operate closer to peak performance without additional insulation work on site.
Minimizes Condensation and Moisture Issues
Insulated refrigerant lines reduce surface condensation, helping protect walls, ceilings, insulation materials and nearby structural surfaces from moisture damage.
HVAC Compatibility and Applications
This 15 ft mini split installation kit is designed for close-to-mid-range indoor-to-outdoor unit spacing in residential and light commercial HVAC projects.
Mini split air conditioners.
Ductless AC systems.
Ductless heat pump systems.
Residential HVAC systems.
Light commercial HVAC installations.
Service upgrades, replacements and retrofit projects.
The kit works with common HVAC refrigerants such as R410A, R32 and similar refrigerants when installed according to equipment manufacturer guidelines and local code requirements.
99.9% Pure Copper
White PE Insulated Pipe
Copper Nut
Features of Pipe Insulation Tubing
The insulation tubing is designed to protect copper refrigerant lines from temperature loss, condensation and installation damage. It supports stable cooling and heating performance for mini split HVAC systems.
Factory-applied thermal insulation for consistent coverage.
Helps reduce heat gain and heat loss along the refrigerant line.
Helps minimize condensation on the pipe surface.
Protects copper tubing during indoor and outdoor installation.
Available insulation thickness options include 8 mm, 9 mm, 10 mm, 13 mm, 19 mm and 25.4 mm.
Flame-resistant options such as M1 and B1 are available.
Thermal Insulation Pipe Production
Insulation Pipe Warehouse
Inner Layer Insulated Pipe
Technical Specifications
| Specification | Detail |
|---|---|
| Product Name | 15 ft 1/4" x 3/8" Mini Split Installation Kit |
| 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, wall cover and fittings |
| Applications | Mini split, ductless AC and heat pump systems |
| Compatible Refrigerants | R410A, R32 and similar HVAC refrigerants |
Installation Tips for Best Results
Measure Your Run Before Installing
Determine the exact distance between indoor and outdoor units before installation. Proper planning helps avoid excessive bends that may restrict refrigerant flow or compress insulation.
Protect Insulation Through Wall Penetrations
Use the included wall pipe and protective cover where the lines pass through walls or siding. This helps keep the insulation intact and creates a cleaner installation appearance.
Secure Line Set with Clamps or Brackets
Use clips, straps or HVAC line supports along the refrigerant line run to prevent sagging, reduce vibration and extend insulation service life.
Follow Manufacturer Installation Requirements
Always follow the HVAC equipment manufacturer’s requirements for line size, maximum line length, flare connection, torque value and refrigerant charge.
Mini Split Installation Kit Size Options
| 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 |
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 |
Why Choose This 15 ft Mini Split Installation Kit?
Complete Time-Saving HVAC Solution
This kit provides essential components for mini split installation in one package, including refrigerant lines, communication wiring, drain hose, wall pipe and wall cover. It reduces jobsite preparation and improves installation efficiency.
Durable Materials and Dependable Performance
High-purity copper and quality insulation support long-term performance across seasonal cooling and heating demands. The kit is suitable for HVAC contractors, installers and distributors.
Suitable for Residential and Light Commercial Projects
Whether installing a mini split in a home, condominium, office space or light commercial property, this 15 ft installation kit provides practical line set length, accessories and reliable performance.
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 with 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 products and communicate with customers face to face.
FAQ
What does 1/4" x 3/8" mean in this mini split installation kit?
It refers to the outer diameters of the refrigerant lines. The 1/4" copper tube is generally the liquid line, and the 3/8" copper tube is generally the suction line.
What is included in the 15 ft mini split installation kit?
The kit includes factory-insulated copper refrigerant lines, flared ends, flare nuts, communication wiring cable, drain hose, wall pipe, wall cover and installation fittings.
What AC capacity is this 1/4" x 3/8" kit commonly used for?
This size is commonly used for 0.75 ton to 1.0 ton mini split systems, including many 9,000 BTU to 12,000 BTU air conditioners. Always confirm with the equipment manual.
Is this installation kit suitable for outdoor use?
Yes. The factory-applied insulation is designed for line runs between indoor and outdoor units. For extended outdoor exposure, a compatible line set cover is recommended.
Do I need to add extra insulation on site?
In many standard installations, additional field wrapping is not required because the kit includes factory-insulated copper lines. Project requirements may vary.
Is this kit compatible with R410A and R32 refrigerant systems?
Yes. This kit supports common modern refrigerants such as R410A and R32 when installed according to system specifications and local code requirements.
Can this kit be used for heat pump systems?
Yes. It can be used for compatible ductless heat pump systems that require 1/4" x 3/8" line set sizing and a 15 ft line run.
Can Dabund provide other sizes and lengths?
Yes. Dabund can supply multiple mini split installation kit sizes and lengths, including 3 m, 4 m, 5 m, 7 m and 10 m, with different insulation thickness options.
Are you a trading company or manufacturer?
Dabund is a manufacturer of mini split installation kits, insulated copper pipe, mini split line sets, aluminum pipe and HVAC parts.
Can I get a free sample?
Yes. Dabund can provide qualified customers with 3 pieces of 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 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 in advance according to factory schedule.
