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

Complete 35 ft mini split installation kit with pre-insulated copper refrigerant lines and essential accessories — ideal for ductless AC, heat pump, and HVAC installations.

Product Overview – All-in-One HVAC Installation Solution

The 35 ft 3/8″ x 3/4″ Mini Split Installation Kit includes pre-insulated copper refrigerant pipes, communication wiring, condensate drain hose, wall pipe with cover, and flare nuts — engineered for professional, clean, and efficient installation.

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Pre-Insulated Copper Refrigerant Line Set

• Two copper tubes with factory-applied insulation: 3/8″ liquid line and 3/4″ suction line.

• Paired insulation minimizes thermal loss, prevents condensation, and enhances HVAC system performance.

• Factory insulation saves time versus field insulation wrapping.

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Complete Installation Accessories Included

• Communication wire cable for indoor/outdoor unit connectivity.

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

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

• Flare nuts and basic fittings for secure line set connections.

Key Features & Benefits

Commonly Compatible with Mini Split Systems

Designed to fit most mid- to large-capacity ductless AC and heat pump systems, this 35 ft line set is ideal for typical installation distances in residential and light commercial use.

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High-Quality Copper Tubing for Long-Term Reliability

Made with 99.9% pure copper tubing, the line set delivers excellent thermal conductivity, corrosion resistance, and durability required for modern HVAC systems.

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Insulation Suitable for Indoor and Outdoor Use

The insulation is UV-resistant and built to handle outdoor exposure while maintaining thermal efficiency and reducing condensation risk.

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Easy To Install and Save Labor Time

Pre-insulated lines and included accessories help streamline the installation process, reducing labor time and on-site insulation errors.

Technical Specifications

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

• Brand: DABUND

• Length: 35 ft (10.67 m)

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

• Copper Material: 99.9% pure copper

• Insulation: Factory-applied (UV resistant)

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

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.

Installation Tips for Best Performance

Measure and Plan Line Path Before Installation

Confirm total run length and routing path to avoid sharp bends, which can restrict refrigerant flow or damage insulation.

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Proper Line Slope for Condensate Drainage

Maintain a slight downward slope toward the outdoor unit to support proper condensate drainage and stable system function.

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Protect Lines at Wall Penetrations

Use the included wall pipe and protective cover to ensure a clean, scratch-free line entry through walls or building openings.

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

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

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

With pre-insulated lines and included accessories, this kit reduces on-site wrapping, measurement errors, and installation time, making it ideal for HVAC professionals and experienced DIY installers.

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Professional-Grade Quality and Performance

Manufactured with premium copper and durable insulation, this kit supports efficient system performance and long-lasting reliability in both residential and commercial HVAC applications.

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 3/4″ refer to?

It refers to the outer diameters of the mini split refrigerant lines: 3/8″ for the liquid line and 3/4″ for the suction line, a common configuration used in many HVAC systems.

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

Yes — the copper tubing and factory insulation are suitable for common refrigerants such as R410A, R32, and others, meeting standard HVAC specifications.

9.Do I need to add extra insulation on site?

No — the factory-applied insulation is designed to handle most indoor and outdoor applications. Field insulation is generally not required unless specified by local code.

10.Can this 35 ft kit be extended?

If your installation requires a longer line set, choose a longer kit (e.g., 50 ft) or consult with an HVAC professional for proper extension methods.