25 ft 3/8″ x 5/8″ Mini Split Installation Kit – Complete HVAC Line Set Kit

Premium installation kit for mini split, ductless and heat pump systems — includes insulated copper refrigerant lines and all necessary accessories for efficient HVAC installation.

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

Overview – What’s Included in This Mini Split Installation Kit

This 25 ft 3/8″ x 5/8″ Mini Split Installation Kit includes factory‑insulated copper refrigerant pipes (liquid and suction), communication wire cable, condensate drain hose, wall pipe and cover, and essential fittings — designed to simplify mini split HVAC installations.

Pre‑Insulated Copper Refrigerant Pipes

• Two copper tubes with factory insulation (available in White PE or Black Rubber) provide thermal protection, minimize condensation, and improve system efficiency.

• Insulation options include thicknesses from 8 mm up to 25.4 mm to match different installation environments.

Accessories for Easy Installation

• Each kit comes with communication wire cable and a 3 m condensate drain hose for hassle‑free setup.

• A wall pipe and cover are included to protect the line pass‑through and give a professional finish.

Why Choose This 3/8″ x 5/8″ HVAC Line Set Kit?

 Widely Compatible with Mini Split Systems

The 3/8″ liquid line and 5/8″ suction line size is suitable for 3.0 TON to 4.0 TON ductless mini split and heat pump systems, covering a broad range of HVAC applications.

High‑Quality Materials and Certifications

• Copper pipes meet ASTM B280 and C12200 standards for HVAC refrigerant lines.

• Insulation materials are UV‑resistant and flame retardant with certifications including ASTM E84, UL94, ASTM D1056, and ASTM G21 — making them suitable for outdoor exposure and long‑term performance.

Designed for Durable HVAC Performance

• The insulation protects against weather, moisture, and thermal loss, ensuring stable operation and longevity of your HVAC system.

• Pre‑flared ends and included nuts help shorten installation time and reduce field work.

Features of pipe insulation tubing:

H2: Technical Specifications

• Model: DBJ‑003

• Brand: DABUND

• Length: 25 ft (7.62 m)

• Copper Material: 99.9% pure copper tubes

• Insulation Options: White PE or Black Rubber

• Application: Mini Split, Ductless HVAC, Heat Pumps

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

25 ft 3/8" x 5/8" 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

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.

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 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 Mini split installation 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.

Installation Tips for Best HVAC Performance

Prepare Line Path Before Setup

Measure the total length needed and confirm the path for refrigerant lines, communication wiring, and drain hose — ensuring there are no sharp bends or obstructions.

Maintain Proper Line Slope

Ensure that the suction and liquid lines maintain appropriate slope for condensate drainage and refrigerant flow, helping optimize mini split efficiency and humidity control.

Why Choose DABUND Mini Split Installation Kits

Expertise and Manufacturing Quality

DABUND has over a decade of experience producing high‑quality HVAC copper products, offering reliable performance and consistent manufacturing standards.

Competitive Pricing & OEM Support

Quality products with competitive pricing and flexible OEM/ODM options for branding and custom specifications.

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.