35 ft 1/4″ x 3/8″ Mini Split Installation Kit – Complete HVAC Line Set Kit

High-quality 35 ft mini split installation kit with pre-insulated refrigerant lines and essential accessories for professional ductless AC and heat pump installations.

The Mini Split Installation Kit is twin already. So buy it now.

Product Overview – All-In-One HVAC Installation Solution

The 35 ft 1/4″ x 3/8″ Mini Split Installation Kit offers a fully equipped line set and accessory package for connecting indoor evaporator and outdoor condenser units of mini split, ductless AC, and heat pump systems.

Pre-Insulated Copper Refrigerant Lines

• Includes two copper tubes: 1/4″ liquid line and 3/8″ suction line with factory insulation.

• Insulation protects against heat loss, condensation, and weather exposure, improving HVAC efficiency and durability.

Factory-Applied Insulation Saves Time

• Pre-insulated lines eliminate the need for additional field insulation, reducing installation time and labor.

• Insulation materials are UV-resistant and suitable for both outdoor and indoor routings.

Complete Installation Accessories Included

• Communication wire cable for indoor/outdoor unit connectivity.

• Condensate drain hose to redirect moisture safely away from the wall.

• Wall pipe and protective cover for clean, professional line entrance.

• Flare nuts and basic fittings for secure refrigerant connections.

Key Features & Benefits

Widely Compatible with Mini Split and Ductless AC Units

This 35 ft length with 1/4″ x 3/8″ refrigerant lines fits a wide range of residential and light commercial mini split systems, making it ideal for typical installation distances between indoor and outdoor units.

High-Quality Copper Tubing for Reliable Performance

Made with 99.9% pure copper, the line set ensures excellent thermal conductivity, corrosion resistance, and long-term performance required for modern HVAC systems.

Designed for Professional-Grade HVAC Installations

Pre-flared ends and included accessories allow for a smoother installation process, helping HVAC technicians and experienced DIY installers save time and reduce potential errors.

99.9% Pure Copper

White PE Insulated Pipe

Copper Nut

Features of pipe insulation tubing:

Machines for the production of thermal insulation pipes

warehouse for insulation pipes

Inner Layer Insulated Pipe

Technical Specifications

• Model: (Example: DBJ-003 — adjust as needed)

• Brand: DABUND

• Length: 35 ft (10.67 m)

• Line Set Size: 1/4″ (liquid line) x 3/8″ (suction line)

• Copper Material: 99.9% pure copper tubing

• Insulation: Factory-applied UV-resistant insulation

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

Installation Tips for Best Results

Confirm Line Routing Before Installation

Measure total path length and plan the route for refrigerant lines, communication wire, and drain hose to avoid unnecessary bends and ensure a professional setup.

Maintain Proper Line Slope

Ensure the suction line maintains a slight downward slope toward the outdoor unit to assist with condensate drainage and refrigerant flow.

Protect Lines at Wall Penetrations

Use the included wall pipe and cover to safeguard the copper lines from abrasion and provide a clean, finished look where lines pass through the wall.

35 ft 1/4" x 3/8" Mini Split Installation Kit for HVACR Applications Wholesaler & Supplier

DABUND PIPE in-house tested Mini Split Installation Kit is designed to make installation simple and quick – saving you time and money on each job.

Mini Split Installation Kit

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 Mini Split Installation Kit?

Save Time and Labor on Installation

Pre-insulated lines with included accessories help reduce installation time and minimize errors, making this kit ideal for contractors and advanced DIYers.

Professional Quality for Reliable HVAC Performance

Engineered with high-quality copper and durable insulation, this installation kit supports efficient operation and long-lasting performance for mini split and heat pump systems.

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.