3/8″ x 5/8″ AC Line Set – Insulated Copper HVAC Refrigerant Line Set

HVAC Parts are produced by Dabund Pipe since 2008 years.

HVAC 3/8" x 5/8" ac line set is in high-grade flame-retardant insulation up to 120℃ and suitable for construction and buildings. Mini split line set is available for suction-line only.

The Mini Split Air Conditioner Line Set is twin already. So buy it now.

Specifications & Technical Standards

1. 3/8" x 5/8" AC is the out dimension in inch. 9.52mm - 15.88mm is the out dimension in metric.

2. 99.9% Pure copper pipe meets ASTM B280 and C12200 standard.

3. AC Copper Size what we can do have following 1/4" 3/8" 1/2" 5/8" 3/4" 7/8" 1 1/8", length can do 15m 20m 25m 30m 50m.

4. Insulation is made of 1/2" Polypropylene & UV Resistant, meets ASTM E 84, UL94, ASTM D1056 and ASTM G 21. Working temperature from -40℃ to 120℃.

5. Works for every Air Conditioning & Refrigeration Application including Ductless mini-split, heat pump and Centralized Air Ducted Units.

6. Pressure Rating: 2100 to 7000 PSI, much more than required 700 PSI for R410.

7. Insulation we produce by ourself, can print your company name, size, meters etc.

Key Features & Benefits

 Ready-to-Use Pre-Insulated Line Set

 High Thermal Insulation Efficiency

Durable & Corrosion-Resistant Construction

OEM Customization Available

Features of pipe insulation tubing:

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℃.

AC Line Set for HVACR Applications Wholesaler & Supplier

DABUND PIPE in-house tested insulate copper pipe and tubing is designed to make installation simple and quick – saving you time and money on each job.

Mini Split AC Line Set

Size	Length	Insulation White PE	Flame Resistant
1/4+3/8	15m/20m/25m/30m/50m	8mm/9mm/10mm/13mm/19mm/25.4mm	M1/B1
1/4+1/2	15m/20m/25m/30m/50m	8mm/9mm/10mm/13mm/19mm/25.4mm	M1/B1
1/4+5/8	15m/20m/25m/30m/50m	8mm/9mm/10mm/13mm/19mm/25.4mm	M1/B1
3/8+5/8	15m/20m/25m/30m/50m	8mm/9mm/10mm/13mm/19mm/25.4mm	M1/B1
3/8+3/4	15m/20m/25m/30m/50m	8mm/9mm/10mm/13mm/19mm/25.4mm	M1/B1
1/2+3/4	15m/20m/25m/30m/50m	8mm/9mm/10mm/13mm/19mm/25.4mm	M1/B1
3/8+7/8	15m/20m/25m/30m/50m	8mm/9mm/10mm/13mm/19mm/25.4mm	M1/B1

1/4 + 3/8 AC refrigerant line set 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 Insulated copper line set 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 AC line set 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 AC line set used for 54000 BTU and 72000 split air conditioner installation.

3/8 + 7/8 Insulated copper piping 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 AC line set used for 54K and 72K split air conditioner installation.

3/8 + 7/8 Insulated copper pipe apply for 72K - 96K ductless mini split air conditioner.

Why Choose Our 3/8″ x 5/8″ AC Line Set

Trusted Quality with Industry Compliance

We are manufacturer of AC Line Set since 2008 years, have good experience of producing and exporting. We have cooperated 9 years forwarder, can guarantee the shipment. Every week we load at least 6-8 40HQ to different countries. Choose Dabund You will win the business.

Individual pre-insulated rolls to perfectly fit every ductless mini-splits, VRF, heat pumps and unitary systems installation.

Manufacturer with Long-Term Experience

Quality products with competitive pricing

Peace of mind with professional services

Manufacturer with Long-Term Experience

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 an AC line set?

An AC line set is a pair of copper tubes used to connect the indoor and outdoor units of an air conditioning system. It typically includes a smaller liquid line and a larger suction line, which transport refrigerant between system components to enable cooling or heating.

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### What does an AC line set include?

An AC line set usually consists of two insulated copper pipes: the liquid line and the suction line. Many AC line sets are pre-insulated to reduce heat transfer, prevent condensation, and simplify installation in HVAC systems.

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### What are AC line sets used for?

AC line sets are used in HVAC systems such as mini-split air conditioners, heat pumps, central air conditioning units, and refrigeration systems. They play a critical role in maintaining efficient refrigerant flow and overall system performance.

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### What sizes are available for AC line sets?

AC line sets are available in multiple size combinations, including 1/4" x 3/8", 1/4" x 1/2", 3/8" x 5/8", and 3/8" x 7/8". The correct size depends on the system capacity and manufacturer specifications.

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### How do I choose the right AC line set size?

Choosing the correct AC line set size depends on the air conditioner’s tonnage, refrigerant type, and installation length. Always follow the HVAC equipment manufacturer’s guidelines to ensure optimal efficiency and prevent pressure loss.

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### Are AC line sets pre-insulated?

Yes. Most modern AC line sets are pre-insulated with closed-cell foam or rubber insulation. Pre-insulated line sets improve energy efficiency, prevent condensation, and reduce on-site installation time.

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### Can AC line sets be used for heat pumps?

Yes. AC line sets are fully compatible with heat pump systems. They are designed to handle both cooling and heating cycles, as well as the pressure requirements of modern refrigerants.

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### What materials are AC line sets made of?

AC line sets are typically made from high-purity copper tubing, such as ASTM B280 or C12200 copper. Copper offers excellent thermal conductivity, corrosion resistance, and long-term durability in HVAC applications.

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### Do AC line sets work with modern refrigerants?

Yes. High-quality AC line sets are designed to be compatible with modern refrigerants such as R410A and R32, provided they meet industry pressure and quality standards.

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### Can AC line sets be used outdoors?

Yes. AC line sets are suitable for outdoor installation when the insulation is UV-resistant or protected with an additional sleeve or cover to prevent degradation from sunlight and weather exposure.

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### How long do AC line sets last?

When properly installed and maintained, AC line sets can last 20–30 years or more. Copper tubing combined with durable insulation ensures long-term performance and system reliability.

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### Are AC line sets easy to install?

Yes. AC line sets are flexible, easy to bend, and available in pre-insulated configurations, which simplifies installation. However, professional installation is recommended to ensure proper flaring, brazing, and system efficiency.

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### Can AC line sets be customized?

Yes. AC line sets can be customized in length, diameter, insulation thickness, and packaging. OEM and private-label options are commonly available for distributors and HVAC manufacturers.

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### Do AC line sets improve energy efficiency?

Yes. Properly sized and insulated AC line sets reduce heat loss and refrigerant pressure drop, allowing HVAC systems to operate more efficiently and consume less energy.