Premium quality 50-foot long line set designed for mini split air conditioner installation. Pre-insulated copper refrigerant tubing with pre-flared ends and accessories ideal for HVAC contractors, installers, and DIYers in the US and global markets.
The Mini Split Long Line Set is twin already. So buy it now.
Complete Mini Split Long Line Set Installation Kit
This all-in-one HVAC mini split line set kit includes everything needed for efficient and reliable installation:
Pre-insulated copper refrigerant tubing – 3/8″ liquid and 5/8″ suction lines
Pre-flared ends with nuts for quick and leak-proof connections
Durable insulation minimizing thermal loss and condensation
Protective packaging to ensure secure transport and storage
Perfect for install runs up to 50 ft, this line set simplifies installation and delivers long-lasting system performance.
Technical Specifications – Engineered for HVAC Application
Copper Line Set Performance Details
Tube Size: 3/8″ liquid line + 5/8″ suction line
Length: 50 ft (15 meters)
Material: Superior grade 99.9% pure copper with seamless design
Pre-flared ends with matching nuts for easy installation
Copper’s excellent thermal conductivity and corrosion resistance make this line set ideal for both residential and commercial HVAC systems.
High-Quality Pre-Insulation
High-density insulation applied at factory
UV and moisture-resistant outer jacket
Enhances energy efficiency and reduces condensation
Suitable for various climate conditions across the US
Pre-insulation improves cooling efficiency while protecting the refrigerant lines from environmental exposure.
Key Benefits of This Mini Split Long Line Set
Ideal for Mini Split & Heat Pump Systems
This 50 ft long line set works with most mini split air conditioners, ductless systems, and heat pumps, making it a versatile choice for HVAC professionals.
Easy and Faster Installation
Pre-flared connections and included flare nuts help reduce on-site work time — improving labor efficiency and reducing installation costs.
Enhanced System Durability
High-quality materials and robust insulation deliver longer service life while maintaining reliable refrigerant flow and system performance.
Features of pipe insulation tubing:
![White PE Embossed insulated pipe]( "insulated pipe")
Applications – Where to Use This Line Set
Suitable for:
Residential split air conditioners
Multi-zone mini split systems
Heat pump installations
Light commercial HVAC projects
Replacement and retrofit line installs
This long line set is ideal for projects requiring extended refrigerant tubing runs up to 50 ft.
Installation Tips for Best Performance
To ensure efficient operation and longevity of your HVAC system:
Measure the required run length accurately before installation.
Verify insulation coverage to prevent thermal losses.
Torque flare nuts properly to prevent refrigerant leaks.
Ensure proper slope of suction lines for moisture drainage.
Following these HVAC best practices helps enhance system performance and reduce maintenance needs.
![White PE copper line set]( "Copper Line Set")
Mini Split 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 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 Insulated copper pipe 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 HVAC lineset 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 HVAC lineset 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 50 ft 3/8" x 5/8" Mini Split Long 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 long line set compatible with all mini split brands?
Yes, this 50 ft 3/8″ × 5/8″ line set is compatible with most mini split and ductless air conditioner systems available in the US and global HVAC markets.
8.Can this line set be shortened?
Yes, the copper tubing can be trimmed to required length as long as proper flaring and sealing practices are followed.
9.Is additional insulation needed for outdoor use?
The factory pre-insulated line set is designed for outdoor installation; however, for extreme exposure conditions, additional protective covering may be recommended.
