Premium 75 ft mini split line set engineered for efficient HVAC installations. This 1/4″ × 3/8″ pre-insulated copper refrigerant line is designed for split air conditioners, heat pumps, and ductless systems — delivering reliable performance and energy efficient operation.
Product Overview – 75 ft Mini Split Line Set
The 75 ft mini split line set delivers a complete copper refrigerant tubing solution with pre-applied insulation that simplifies installation and enhances overall system performance.
Key Features:
Liquid Line Diameter: 1/4″
Suction Line Diameter: 3/8″
Length: 75 ft (22.9 meters)
Pre-insulated for improved energy efficiency
Flexible, easy-to-route copper tubing
Ideal for HVAC professionals, contractors, and DIY installers who need a long, reliable line set for split system installations.
Technical Specifications – Designed for HVAC Performance
Premium Copper Refrigerant Tubing
Constructed from 99.9% pure seamless copper
Uniform wall thickness for consistent refrigerant flow
Excellent thermal conductivity for efficient system operation
Corrosion-resistant for long-lasting durability
Copper tubing ensures dependable refrigerant circulation and superior heat transfer performance in HVAC systems.
High-Quality Insulation Features
Factory-applied insulation saves time on site
UV and moisture-resistant insulation jacket
Protects against condensation and thermal loss
Enhances HVAC energy efficiency
Pre-insulated tubing reduces heat exchange with outside air, helping to maintain system performance across varying climates.
Key Benefits of This Mini Split Line Set
Ideal for Ductless Mini Split & HVAC Systems
This line set is compatible with most mini split air conditioning and heat pump systems, making it a versatile choice for residential and light commercial installations.
Easy Installation & Time Savings
Pre-insulated and ready to install — no need for additional insulation materials — saving time and labor costs on the job site.
Better Cooling Efficiency
The pre-insulation helps maintain refrigerant temperature, supporting better cooling performance and lower energy bills.
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.
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Applications – Where This Line Set Is Used
This 75 ft mini split line set is suitable for:
Residential split AC systems
Ductless mini split installations
Heat pump refrigerant lines
Retrofit and replacement projects
Multi-zone ductless systems
Perfect for professional HVAC installers, wholesalers, and experienced DIY users.
HVAC Installation Best Practices
Follow these pro tips for a successful installation:
Measure required line length before cutting to ensure correct run.
Avoid kinks or sharp bends that impede refrigerant flow.
Use proper flaring and sealing methods to prevent leaks.
Pressure test the system before full start-up.
Proper installation enhances system longevity and performance.
![Black rubber copper line set]( "Black rubber copper line set")
Mini Split Line Set
Size | Length | Insulation Black Rubber | 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 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 Line set for mini split 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 line set used for 54000 BTU and 72000 split air conditioner installation.
3/8 + 7/8 Insulated copper pipe 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 line set 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 75 ft 1/4" x 3/8" Mini Split Line Set from DABUND PIPE
We are manufacturer of mini split 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.
Quality products with competitive pricing
Peace of mind with professional services
DABUND FACTORY
We produce Insulated Copper Pipe, Mini Split Line Set and Aluminum Pipe and HVAC Parts
![Factory Profile]( "Factory Profile")
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
![证书]( "证书")
Exhibition
We join the exhibitions all over the word, just to facilitate customers to experience our mini split line set face to face.
![TRADE SHOW]( "TRADE SHOW")
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.Is this line set compatible with all mini split brands?
Yes, the 1/4″ × 3/8″ line set works with most mini split and ductless HVAC systems on the market. You should always check the manufacturer’s installation manual for specifications.
8.Can this copper tubing be trimmed?
Yes, the copper line set can be cut to fit specific installation lengths. After cutting, re-flare and seal to maintain system integrity.
9. Is additional insulation required?
No, the pre-insulated line set comes factory-insulated and is ready for installation — saving time and labor cost.
