The 50 ft 1/4″ × 3/8″ HVAC Installation Kit is a complete solution that combines pre-insulated copper refrigerant lines with essential installation components — designed for efficient, professional-grade mini split and ductless HVAC installs.
The AC Installation Kit is twin already. So buy it now.
Product Overview – All-In-One HVAC Installation Solution
This comprehensive installation kit includes:
A 50 ft pre-insulated copper line set
Essential accessories for condensate drain, wiring, wall penetration protection, and secure connections
It is ideal for residential and light commercial mini split or ductless AC installations where a clean, fast, and reliable installation is critical.
Pre-Insulated Copper Line Set for Thermal Efficiency
1/4″ liquid line — carries refrigerant from outdoor unit
3/8″ suction line — returns refrigerant vapor to compressor
Factory insulation helps maintain refrigerant temperature
Reduces heat gain/loss and minimizes condensation
Accessories Included for a Professional Install
This HVAC installation kit includes all necessary components:
Pre-insulated copper refrigerant lines with flared ends
Communication wiring cable for indoor-outdoor unit linkage
Condensate drain hose for moisture removal
Wall pipe and decorative cover for neat wall penetration
Fittings and flare nuts for secure, leak-resistant connections
Key Features & Benefits
Quick & Easy Installation Process
By bundling all required parts into a single kit, this product streamlines installation — eliminating the need to source individual components and helping reduce installation time and costs.
Improved HVAC Efficiency & Performance
Factory-applied insulation on the refrigerant lines helps maintain consistent temperature as refrigerant travels between indoor and outdoor units, improving overall system efficiency.
Reduces Condensation and Moisture Problems
Insulated lines significantly limit condensation buildup (“sweating”), helping protect walls, ceilings, and materials from moisture damage — especially in humid environments.
Features of pipe insulation tubing:
![White PE Embossed insulated pipe]( "insulated pipe")
HVAC Compatibility & Application Scenarios
Ideal for Mini Split & Ductless Air Conditioners
This kit is a perfect fit for:
Mini split air conditioners
Ductless HVAC systems
Heat pump installations
Residential homes, apartments, offices
The 50 ft line set suits moderate indoor-to-outdoor distances without needing extra extenders or complex custom lines.
Compatible with Standard HVAC Refrigerants
Engineered to work with widely used refrigerants such as:
Technical Specifications
| Feature | Specification |
| Line Set Length | 50 ft (~15.24 m) |
| Liquid Line Diameter | 1/4″ (≈6.35 mm) |
| Suction Line Diameter | 3/8″ (≈9.52 mm) |
| Material | 99.9% Pure Copper |
| Insulation | Factory-applied thermal insulation |
| Included Accessories | Wiring cable, drain hose, wall pipe & cover |
| Applications | Mini split, ductless AC, heat pump installs |
| Refrigerant Compatibility | R410A, R32, and similar HVAC refrigerants |
Installation Tips for Best Results
Measure Your Line Path Before Starting
Before beginning installation, measure the total run length carefully to ensure this 50 ft kit provides enough reach without excessive bends that can restrict refrigerant flow.
Protect Insulation at Wall Penetrations
Use the included wall pipe and cover to protect insulation where the line set passes through walls or ceiling penetrations — preserving insulation integrity and appearance.
Secure Line Set Along Its Run
Use HVAC-rated clips, straps, or brackets to secure the refrigerant line set along the path — reducing vibration, preventing sagging, and maintaining insulation performance over time.
![copper pipe kit]( "Copper pipe kit")
HVAC Installation Kit
Size | Length | Insulation White PE | 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 HVAC Installation Kit 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 Mini Split Installation 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 HVAC Installation Kit used for 4.5P and 6P split aircon installation.
3/8 + 7/8 AC Installation Kit 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 AC Installation Kit 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 Installation Kit used for 54000 BTU and 72000 split air conditioner installation.
3/8 + 7/8 Mini Split Installation Kit apply for 72000 BTU - 96000 BTU ductless mini split air conditioner.
HVAC Installation Kit 1/4 + 3/8 used for 9K and 12K split air conditioner.
Mini Split Installation Kit 1/4 + 1/2 commonly used for 12K and 18K mini split air conditioners.
1/4 + 5/8 AC Installation Kit 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 Line set kit 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 50 ft 1/4" x 3/8" HVAC Installation Kit from DABUND PIPE
Complete HVAC Solution in One Package
Combining refrigerant lines with all essential installation parts helps you save time, reduce parts shortages, and ensure every job has the right accessories.
Factory Insulation Enhances System Performance
Pre-insulated lines retain refrigerant temperatures more effectively than field-wrapped alternatives, improving system efficiency and consistency.
Professional-Grade Quality & Durability
Made from high-purity copper and factory insulation, this kit supports reliable performance and long-lasting HVAC operation — ideal for contractors and experienced DIYers.
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.What does “1/4″ × 3/8″” refer to?
It designates the outer diameters of the two copper refrigerant lines: 1/4″ liquid line for refrigerant feed and 3/8″ suction line for vapor return — a common configuration in mini split systems.
8. Are the lines insulated?
Yes — this installation kit’s copper lines come with factory-applied insulation, which improves thermal performance and reduces condensation without extra field wrapping.
9.Can this kit be used outdoors?
Yes — the insulation is weather-resistant and UV durable, making it suitable for outdoor applications between indoor and outdoor HVAC units.
10. Is this compatible with R410A HVAC systems?
Yes — this installation kit supports widely used refrigerants like R410A and R32 when installed according to system guidelines and local HVAC codes.
