15 ft 3/8″ x 3/4″ Mini Split Installation Kit – Complete HVAC Line Set Kit

Premium 15 ft mini split installation kit featuring pre-insulated copper line set and essential accessories for professional HVAC and ductless air conditioner installations.

Product Overview – All-in-One HVAC Installation Solution

This 15 ft 3/8″ x 3/4″ Mini Split Installation Kit provides everything needed to connect your indoor and outdoor mini split or heat pump units. Designed for quick, reliable, and clean HVAC installations with high-quality materials and factory-applied insulation.

Pre-Insulated Copper Refrigerant Line Set

• Includes a 3/8″ liquid line and 3/4″ suction line with factory-applied insulation.

• Insulation protects against thermal loss, condensation, and weather exposure.

• Pre-insulation reduces installation time and enhances system performance.

Installation Accessories Included

• Communication wire cable for indoor–outdoor connectivity.

• Condensate drain hose to direct moisture safely away from the unit.

• Wall pipe and decorative cover for professional line routing and protection.

• Flare nuts and basic fittings for secure connections.

Key Features and Benefits

Suitable for Most Mini Split and HVAC Systems

This 15 ft line set size (3/8″ x 3/4″) fits a wide range of mini split and ductless heat pump systems, making it ideal for residential and light commercial installations.

High-Quality Copper Tubing for Reliable Performance

The kit features 99.9% pure copper pipes engineered for excellent thermal conductivity and corrosion resistance, ensuring long-term reliability.

Factory-Applied Insulation Saves Time

Factory-applied insulation eliminates the need for additional field wrapping, helping installers save labor time and avoid insulation inconsistencies.

Designed for Indoor and Outdoor Installations

The insulation materials are UV resistant and weather capable, suitable for both indoor passage and outdoor exposure.

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.

Technical Specifications

• Model: (Example if needed: DBJ-003 or similar)

• Length: 15 ft (4.57 m)

• Line Set Size: 3/8″ (liquid) x 3/4″ (suction)

• Copper Material: 99.9% pure copper tubing

• Insulation: Factory-applied (UV resistant)

• Included Accessories: Communication wire, drain hose, wall pipe & cover, flare nuts

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Installation Tips for Best Performance

Measure Distance Before Unpacking

Ensure the 15 ft length covers the total distance between indoor and outdoor units with extra slack for routing.

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Maintain Proper Line Slope

Keep a slight downward slope on the suction line toward the outdoor unit to support proper condensate drainage and refrigerant flow.

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Protect Lines Through Wall Sections

Use the provided wall pipe and cover to prevent abrasion and provide a polished finished look at the building entry point.

Mini Split Installation 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 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 Mini split installation kit 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 kit 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.

Why Choose This Mini Split Installation Kit?

Reduces Installation Time and Errors

Pre-insulated lines and included accessories reduce the time needed to assemble components on site and help minimize installation mistakes.

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Professional Quality for Contractors and DIY Installers

Designed for both HVAC professionals and experienced DIY users, this kit delivers reliable performance and a clean, finished installation.

DABUND FACTORY

We produce Insulated Copper Pipe, Mini Split Line Set and Aluminum Pipe and HVAC Parts

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

Exhibition

We join the exhibitions all over the word, just to facilitate customers to experience our mini split line set face to face.

FAQ

What Is a Mini Split Installation Kit?

A mini split installation kit is a complete set of components used to install ductless mini split air conditioners and heat pump systems. It typically includes pre-insulated copper refrigerant line sets and essential accessories needed to connect indoor and outdoor units.

 What Is Included in a Mini Split Installation Kit?

A standard mini split installation kit usually includes:

• Pre-insulated copper refrigerant lines (liquid line and suction line)

• Communication wire cable

• Condensate drain hose

• Wall sleeve or wall pipe with cover

• Flare nuts and basic fittings

These components help simplify installation and ensure system compatibility.

What Sizes Are Available for Mini Split Installation Kits?

Mini split installation kits are available in multiple line set sizes such as:

• 1/4″ x 3/8″

• 1/4″ x 1/2″

• 3/8″ x 5/8″

• 3/8″ x 3/4″

Common lengths include 15 ft, 25 ft, 30 ft, 50 ft, and custom options to suit different installation distances.

Are Mini Split Installation Kits Compatible with All Brands?

Yes. Most mini split installation kits are designed to be universally compatible with major ductless AC and heat pump brands. Always confirm the required line set size and length specified by the manufacturer before installation.

What Type of Copper Is Used in Mini Split Installation Kits?

High-quality mini split installation kits use 99.9% pure copper tubing that meets HVAC standards such as ASTM B280 and C12200, ensuring excellent thermal conductivity, corrosion resistance, and long service life.

Is the Refrigerant Line Set Pre-Insulated?

Yes. Mini split installation kits come with factory-applied insulation that helps:

• Reduce energy loss

• Prevent condensation

• Protect the copper pipes from UV exposure and weather damage

This eliminates the need for additional field insulation in most applications.

Can Mini Split Installation Kits Be Used Outdoors?

Yes. The insulation materials used in mini split installation kits are designed for outdoor and indoor installations, offering resistance to sunlight, moisture, and temperature changes.

Are Mini Split Installation Kits Compatible with R410A and R32 Refrigerants?

Yes. Mini split installation kits are suitable for modern refrigerants such as R410A, R32, and other commonly used refrigerants, meeting the pressure and safety requirements of current HVAC systems.

Are Mini Split Installation Kits Easy to Install?

Mini split installation kits are designed for easy and efficient installation. Pre-insulated pipes, pre-flared ends, and included accessories reduce installation time and minimize errors for HVAC professionals and experienced DIY users.

Do Mini Split Installation Kits Help Improve Energy Efficiency?

Yes. Properly insulated refrigerant lines help maintain refrigerant temperature, reduce heat loss, and improve overall system efficiency, leading to better cooling and heating performance.

Can Mini Split Installation Kits Be Customized?

Yes. Many manufacturers offer customization options including:

• Custom pipe diameters and lengths

• Different insulation thicknesses and materials

• OEM branding and private labeling

• Custom packaging for distributors and wholesalers

Are Mini Split Installation Kits Suitable for Residential and Commercial Use?

Absolutely. Mini split installation kits are widely used in:

• Homes and apartments

• Offices and retail spaces

• Hotels and light commercial buildings

They provide a professional and reliable installation solution across different applications.

Why Choose a Complete Mini Split Installation Kit Instead of Separate Parts?

Using a complete mini split installation kit ensures component compatibility, reduces installation time, lowers the risk of missing parts, and delivers a cleaner, more professional HVAC installation.