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DBJ-003
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DABUND
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Copper
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1M - 50M
Material
Color
Keywords
Application
100 ft 3/8" x 5/8" Line Set for Mini Split HVAC Systems
The 100 ft 3/8" x 5/8" line set for mini split from Dabund is a professional-grade pre-insulated HVAC copper refrigerant tubing solution for ductless mini split air conditioners, heat pumps, multi-zone HVAC systems, and long-distance refrigerant line installations.
This line set includes a 3/8 inch liquid line and a 5/8 inch suction line, with factory-applied insulation to reduce condensation, improve energy efficiency, and protect the copper tubing during indoor and outdoor HVAC installation.
Product Overview – 100 ft Mini Split Line Set
This 100 ft mini split line set provides a long-distance refrigerant piping solution for installations where the indoor and outdoor units are far apart. The pre-insulated copper tubing helps simplify installation, reduce field insulation work, and maintain stable refrigerant temperature during cooling and heating operation.
Line Set Size: 3/8" liquid line + 5/8" suction line
Length: 100 ft / approximately 30.5 m
Material: 99.9% pure seamless copper
Insulation: factory-applied white PE insulation
Application: mini split, ductless HVAC, heat pump, split AC, long-distance HVAC line set
Suitable Buyers: HVAC contractors, wholesalers, distributors, OEM buyers, and professional installers
The 3/8" x 5/8" configuration is widely used for medium to large ductless HVAC systems and is suitable for installations requiring stable refrigerant flow over extended line runs.
Technical Specifications – Built for HVAC Performance
| Feature | Specification |
|---|---|
| Product Name | 100 ft 3/8" x 5/8" Line Set for Mini Split |
| Liquid Line | 3/8" |
| Suction Line | 5/8" |
| Length | 100 ft / 30.5 m |
| Copper Material | 99.9% Pure Seamless Copper |
| Insulation | Factory-Applied White PE Insulation |
| Application | Mini Split AC, Ductless HVAC, Heat Pump, Split AC, HVAC Refrigerant Tubing |
| Typical System Range | 3.0–4.0 Ton / 36,000–48,000 BTU depending on equipment requirements |
| Customization | Custom length, insulation thickness, logo printing, packaging, OEM and ODM options |
Premium Copper Refrigerant Tubing
99.9% Pure Copper Construction
The copper tubing is made from 99.9% pure seamless copper, providing excellent thermal conductivity, corrosion resistance, pressure stability, and long-term durability for HVAC refrigerant line applications.
3/8" Liquid Line and 5/8" Suction Line
The 3/8" liquid line carries high-pressure refrigerant to the indoor unit, while the 5/8" suction line returns refrigerant vapor to the compressor. This size is commonly used for 36,000–48,000 BTU ductless mini split and heat pump systems, depending on the equipment manufacturer’s requirements.
Uniform Wall Thickness for Pressure Stability
Uniform copper wall thickness supports stable refrigerant circulation and helps maintain safe HVAC system operation under cooling and heating cycles.
Factory-Applied Insulation for Better Efficiency
The line set is factory-insulated to protect the copper tubing from condensation, moisture, outdoor exposure, and heat transfer. Pre-insulated tubing helps reduce installation labor and delivers more consistent insulation quality compared with field wrapping.
High-density insulation applied at the factory
UV and moisture resistant outer jacket
Reduces condensation and thermal loss
Improves energy efficiency and system performance
Suitable for indoor and outdoor HVAC installations
99.9% Pure Copper
White PE Insulated Pipe
Plastic Cap Protection
Features of Pipe Insulation Tubing
The insulation tubing helps protect the HVAC copper refrigerant tubing from thermal loss, condensation, sunlight, moisture, and installation wear. It is especially important for long line runs where temperature stability affects system efficiency.
Thermal Insulation Pipe Production
Insulated Pipe Warehouse
Inner Layer Insulated Pipe
Key Benefits of This Mini Split Line Set
Optimized for Long Line Runs
At 100 ft, this line set is suitable for installations requiring extended piping distance, including large homes, office buildings, multi-zone layouts, detached outdoor unit locations, and complex HVAC routing projects.
Energy-Efficient Performance
The insulated design helps reduce unwanted heat transfer, lower condensation risk, and maintain refrigerant temperature stability. This supports efficient cooling and heating performance.
Easy Installation and Labor Savings
Pre-insulated copper tubing reduces on-site insulation work and helps installers complete projects faster. A continuous 100 ft roll can also reduce the number of connection points when properly routed.
Durable for Residential and Commercial HVAC Projects
High-purity copper and durable insulation make this line set suitable for long-term use in residential, light commercial, and professional HVAC installation environments.
Applications – Where This Line Set Can Be Used
Residential mini split air conditioning systems
Multi-zone ductless HVAC installations
Heat pump refrigerant lines
Split AC system refrigerant tubing
Long-distance HVAC projects
Retrofit and replacement installations
Light commercial air conditioning systems
The 3/8" x 5/8" line set is commonly used for 3.0–4.0 ton or 36,000–48,000 BTU ductless systems. Final sizing should always follow the HVAC equipment manufacturer’s installation manual.
Installation Tips and Best Practices
Measure the total line run before installation to confirm the required length.
Avoid sharp bends or kinks to maintain consistent refrigerant flow.
Maintain continuous insulation coverage for better thermal protection.
Use proper flaring and torque tools for leak-resistant connections.
Protect the line set at wall penetrations with sleeves or grommets.
Secure the line set with HVAC-rated supports to prevent vibration and sagging.
Pressure test the system before startup according to HVAC installation requirements.
Following these best practices helps improve system efficiency, reduce maintenance issues, and extend the service life of the HVAC refrigerant line set.
Available Mini Split Line Set Sizes
| 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 |
Mini Split Line Set Size Guide
| Line Set Size | Typical Ton Range | Typical BTU Range | Common Application |
|---|---|---|---|
| 1/4" + 3/8" | 0.75–1.0 Ton | 9,000–12,000 BTU | Small mini split air conditioner |
| 1/4" + 1/2" | 1.5–2.0 Ton | 12,000–18,000 BTU | Residential mini split system |
| 1/4" + 5/8" | 2.0–2.5 Ton | 24,000–30,000 BTU | Medium split air conditioner system |
| 3/8" + 5/8" | 3.0–4.0 Ton | 36,000–48,000 BTU | Large residential or light commercial HVAC |
| 3/8" + 3/4" | 4.5–6.0 Ton | 54,000–72,000 BTU | Commercial split AC installation |
| 3/8" + 7/8" | 6.0–8.0 Ton | 72,000–96,000 BTU | Large ductless HVAC system |
Why Choose Dabund 100 ft 3/8" x 5/8" Line Set?
HVAC Manufacturing Since 2008
Dabund has manufactured mini split line sets, insulated copper pipes, air conditioner installation kits, aluminum pipes, and HVAC parts since 2008, with long-term production and export experience.
Factory-Direct Supply for Global Buyers
Dabund supports wholesalers, contractors, importers, distributors, and OEM buyers with stable production, regular export shipment, and competitive factory-direct pricing.
Compatible with Ductless Mini Split, VRF, Heat Pump, and Unitary Systems
Individual pre-insulated rolls can be used for ductless mini splits, VRF systems, heat pumps, and unitary HVAC installations when the equipment specifications match the line set size.
OEM and ODM Customization
Dabund supports custom line set length, copper tube size, insulation thickness, insulation material, logo printing, packaging design, and private label solutions for HVAC brands.
Dabund Factory
Dabund produces insulated copper pipe, mini split line set, aluminum pipe, and HVAC parts for global HVAC buyers.
SGS Certificate
Mini split line set insulation can be made of polypropylene or black rubber with UV resistance and compliance with ASTM E84, UL94, ASTM D1056, and ASTM G21.
Exhibition and Global Market Experience
Dabund joins international exhibitions to help customers inspect mini split line sets, insulated copper pipes, and HVAC parts face to face.
FAQ About 100 ft 3/8" x 5/8" Mini Split Line Set
What is a 100 ft 3/8" x 5/8" line set used for?
It is used to connect indoor and outdoor units in mini split air conditioners, ductless HVAC systems, heat pumps, and split AC systems that require long-distance refrigerant piping.
What does 3/8" x 5/8" mean?
It refers to the copper tube diameters. The 3/8 inch tube is usually the liquid line, and the 5/8 inch tube is usually the suction line.
What HVAC system size is this line set suitable for?
The 3/8" x 5/8" line set is commonly used for 3.0–4.0 ton or 36,000–48,000 BTU systems. Final sizing should be confirmed according to the HVAC equipment manufacturer’s installation manual.
Is this 100 ft line set compatible with all mini split brands?
It is compatible with many mini split and ductless HVAC systems when the required line size is 3/8" x 5/8". Always verify the line set size, refrigerant type, and maximum line length with the system manufacturer.
Can this line set be cut for custom installations?
Yes. The copper tubing can be trimmed to fit specific installations. Proper deburring, flaring, sealing, and pressure testing are required after cutting.
Is additional insulation required for outdoor use?
The factory-applied insulation is suitable for standard outdoor HVAC installations. In extreme sunlight, harsh weather, or special project environments, additional UV or weatherproof covering may be recommended.
Can Dabund customize the line set length or insulation thickness?
Yes. Dabund supports custom length, copper tube size, insulation thickness, insulation material, logo printing, packaging design, and OEM/ODM production.
What are your payment terms?
Common payment terms include T/T, L/C at sight, credit card, and other agreed payment methods based on order details.
What are your delivery terms?
Dabund can support EXW, FOB, CFR, CIF, and other international delivery terms according to customer requirements.
Are you a trading company or manufacturer?
Dabund is a manufacturer of mini split line sets, insulated copper pipes, HVAC copper refrigerant tubing, aluminum pipes, and HVAC parts.
Can I get a sample before bulk ordering?
Yes. Dabund can provide free samples for evaluation. Buyers usually need to cover the express shipping cost.
How long is your delivery time?
The usual delivery time is 15–20 days. For urgent orders, Dabund can discuss faster production and delivery arrangements according to order quantity and current production schedule.
