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

Premium 35 ft mini split installation kit featuring pre-insulated copper refrigerant lines and all essential installation components for ductless AC, heat pump, and HVAC systems.

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

Product Overview – All-in-One HVAC Installation Solution

The 35 ft 3/8″ x 5/8″ Mini Split Installation Kit includes factory-insulated refrigerant lines, communication wire, condensate drain hose, wall pipe with cover, and flare nuts and fittings — designed to speed up installation and ensure professional, efficient HVAC performance.

Pre-Insulated Copper Refrigerant Lines

• Includes two copper tubes with factory-applied insulation: 3/8″ liquid line and 5/8″ suction line.

• Insulation helps minimize heat gain/loss, prevent condensation, and improve overall system efficiency.

• Factory insulation eliminates the need for time-consuming field insulation wrapping.

Complete Accessory Pack for Quick Installation

• Communication wire cable for secure indoor-outdoor unit connection.

• Condensate drain hose for safe moisture drainage.

• Wall pipe and protective cover for neat routing and wall protection.

• Flare nuts and basic fittings to simplify assembly and reduce installation errors.

Key Features & Benefits

Ideal for Most Mini Split and HVAC Systems

Designed to fit a wide range of ductless AC and heat pump models, the 3/8″ x 5/8″ line size and 35 ft length make this kit a versatile choice for typical residential and light commercial installations.

High-Quality 99.9% Copper Tubing

Manufactured using 99.9% pure copper, this line set provides excellent thermal conductivity, corrosion resistance, and long-lasting performance in demanding HVAC environments.

UV-Resistant Insulation for Indoor & Outdoor Use

The insulation is UV-resistant and built to withstand outdoor elements, ensuring durability and consistent performance in various climates.

Easy to Install for HVAC Technicians and DIYers

With pre-insulated piping and included accessories, this installation kit helps reduce installation time and complexity — saving labor costs and minimizing on-site mistakes.

Technical Specifications

• Model: (Example: DBJ-003 or as listed)

• Brand: DABUND

• Length: 35 ft (10.67 m)

• Line Size: 3/8″ (liquid) x 5/8″ (suction)

• Material: 99.9% pure copper tubing

• Insulation: Factory-applied UV-resistant insulation

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

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   Installation Tips for Best Performance

• Measure & Plan Line Routing Before Installation

• Before installation, confirm the total path length and plan line routing to avoid sharp bends and interference with structural components — ensuring smooth refrigerant flow.

• Maintain Correct Line Slope for Drainage

• Ensure the suction line maintains a proper slope toward the outdoor unit to support condensate drainage and prevent water buildup.

• Protect Lines at Wall Penetrations

• Use the provided wall pipe and protective cover to secure the refrigerant line entry through walls and prevent abrasion or damage.

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

With embossed polyethyene film, climate resistant foam, and  thickened insulated cotton, this three-layer insulated mini split copper line set is corrosion-resistant, fireproofing, flame-retarded, thermal insulation, waterproof, shockproof, sound absorption and durable.

Outer Layer: Anti-aging, UV-resistant PE fllm, wear-resistant embossed pattern, antl-aging.

Middle Layer: IXPE foam, dense cell, heat and cold-resistant, impact absorption, no water penetration, good thermal insulation. Water cross-linked PE foam.

Inner Layer: Closed-cell structure, air tightness; good thermal insulation, temperature resistant -40℃~120℃.

35 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

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.

Why Choose This Mini Split Installation Kit?

Save Time and Labor on HVAC Installations

Pre-insulated lines and complete accessories help reduce on-site labor, simplify installation procedures, and minimize installation errors — ideal for contractors and experienced DIY installers.

Professional-Grade Quality for Reliable Performance

Manufactured with high-quality copper and durable insulation, this kit supports efficient HVAC operation and long-lasting reliability in residential and commercial installations.

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

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 3/8″ x 5/8″ refer to?

It refers to the outer diameters of the refrigerant lines: 3/8″ for the liquid line and 5/8″ for the suction line, which is a common configuration for many mini split HVAC systems.

8.Is this installation kit compatible with R410A and R32 refrigerants?

Yes — the copper line set and insulation are compatible with modern refrigerants such as R410A, R32, and similar HVAC refrigerants, meeting common pressure and safety requirements.

9.Do I need additional insulation on site?

No — this kit includes factory-applied insulation, which is sufficient for most indoor and outdoor applications without additional field wrap.

10.Can I extend this line set beyond 35 ft?

If a longer installation distance is required, you can select a longer kit (e.g., 50 ft), or consult with an HVAC professional for proper line extension recommendations.