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DBJ-003
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DABUND
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99.9% Copper/aluminum
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1M - 10M
Material
Color
Keywords
Application
50 ft 1/4" x 3/8" HVAC Installation Kit for Mini Split Air Conditioners
The DABUND 50 ft 1/4" x 3/8" HVAC installation kit is a complete line set solution for mini split air conditioners, ductless HVAC systems, heat pumps, and light commercial air conditioning installations. It combines pre-insulated copper refrigerant lines with essential installation components to support faster, cleaner, and more reliable HVAC installation.
This kit includes a 50 ft 1/4" liquid line and 3/8" suction line, plus accessories for wiring, condensate drainage, wall penetration protection, and secure flare connections. It is commonly used for 9,000–12,000 BTU mini split systems when the HVAC equipment manufacturer specifies this line size and installation length.
Product Overview – All-In-One HVAC Installation Solution
This comprehensive HVAC installation kit is designed for contractors, installers, distributors, and project buyers who need a ready-to-install mini split line set package. It reduces the need to purchase separate accessories and helps standardize installation quality.
50 ft pre-insulated copper refrigerant line set
1/4" liquid line for refrigerant feed
3/8" suction line for vapor return
Communication cable for indoor and outdoor unit linkage
Condensate drain hose for moisture removal
Wall pipe and decorative cover for neat wall penetration
Flare nuts and fittings for secure refrigerant connections
Pre-Insulated Copper Line Set for Thermal Efficiency
The factory-insulated copper refrigerant lines help maintain refrigerant temperature, reduce heat gain or heat loss, and minimize condensation during HVAC system operation.
1/4" liquid line carries refrigerant from the outdoor unit
3/8" suction line returns refrigerant vapor to the compressor
Factory-applied insulation improves thermal consistency
Insulated line set helps reduce condensation on pipe surfaces
Accessories Included for a Professional Installation
The installation kit includes core accessories required for a clean and professional mini split installation, reducing sourcing time and helping installers complete projects more efficiently.
Pre-insulated copper refrigerant lines with flared ends
Communication wiring cable for indoor-outdoor connection
Condensate drain hose for moisture discharge
Wall pipe and decorative cover for wall protection
Fittings and flare nuts for secure installation
Key Features and Benefits
Quick and Easy Installation Process
By bundling refrigerant lines, wiring, drain hose, wall sleeve, decorative cover, and fittings into one package, this HVAC installation kit streamlines the installation process and reduces time spent sourcing separate components.
Improved HVAC Efficiency and Performance
Factory-applied insulation helps maintain consistent refrigerant temperature as refrigerant travels between the indoor and outdoor units, supporting more stable cooling and heating performance.
Reduces Condensation and Moisture Problems
Insulated copper lines help limit condensation buildup, protecting walls, ceilings, and surrounding building materials from moisture-related damage, especially in humid environments.
99.9% Pure Copper
White PE Insulated Pipe
Copper Nut
Pipe Insulation Tubing Features
The pipe insulation tubing is designed for thermal protection, condensation control, UV resistance, and long-term durability. It helps protect the copper line set and maintain stable HVAC operating performance.
Thermal Insulation Pipe Production
Insulated Pipe Warehouse
Inner Layer Insulated Pipe
HVAC Compatibility and Application Scenarios
Ideal for Mini Split and Ductless Air Conditioners
This 50 ft HVAC installation kit is suitable for residential and light commercial systems where a 1/4" x 3/8" copper line set is specified.
Mini split air conditioners
Ductless HVAC systems
Heat pump installations
Residential homes, apartments, and offices
The 50 ft line set supports moderate indoor-to-outdoor distances without requiring additional extenders or complex custom line combinations in many standard installations.
Compatible with Standard HVAC Refrigerants
This installation kit can be used with common HVAC refrigerants such as R410A, R32, and similar refrigerants when the pipe size, wall thickness, line length, pressure rating, and HVAC system requirements match.
Technical Specifications
| Feature | Specification |
|---|---|
| Product Name | 50 ft 1/4" x 3/8" HVAC Installation Kit |
| Product Type | Complete mini split HVAC line set kit |
| Line Set Length | 50 ft / approximately 15.24 m |
| Liquid Line Diameter | 1/4" / approximately 6.35 mm |
| Suction Line Diameter | 3/8" / approximately 9.52 mm |
| Copper Material | 99.9% pure copper |
| Insulation | Factory-applied thermal insulation |
| Included Accessories | Wiring cable, drain hose, wall pipe, decorative cover, flare nuts, and fittings |
| Applications | Mini split, ductless AC, heat pump, and light commercial HVAC installations |
| Refrigerant Compatibility | R410A, R32, and similar HVAC refrigerants when system specifications match |
Installation Tips for Best Results
Measure Your Line Path Before Starting
Before installation, measure the total run length carefully to confirm this 50 ft kit provides enough reach without excessive bends that may restrict refrigerant flow.
Protect Insulation at Wall Penetrations
Use the included wall pipe and cover to protect the insulation where the line set passes through walls or ceilings. This helps preserve insulation integrity and improves the finished appearance.
Secure the Line Set Along Its Run
Use HVAC-rated clips, straps, or brackets to secure the refrigerant line set along the route. Proper support reduces vibration, prevents sagging, and maintains insulation performance over time.
HVAC Installation Kit Size Options
| 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 |
Line Set Size and HVAC Capacity Reference
| Line Set Size | Common Ton / HP Range | Common BTU Range | Typical Application |
|---|---|---|---|
| 1/4 + 3/8 | 0.75 ton – 1.0 ton / 0.75P – 1P | 9000–12000 BTU / 9K–12K | Small mini split air conditioner |
| 1/4 + 1/2 | 1.5 ton – 2.0 ton / 1.5P – 2P | 12000–18000 BTU / 12K–18K | Medium mini split air conditioner |
| 1/4 + 5/8 | 2.0 ton – 2.5 ton / 2P – 2.5P | 24000–30000 BTU / 24K–30K | Split AC and heat pump system |
| 3/8 + 5/8 | 3.0 ton – 4.0 ton / 3P – 4P | 36000–48000 BTU / 36K–48K | Ductless commercial air conditioner |
| 3/8 + 3/4 | 4.5 ton – 6.0 ton / 4.5P – 6P | 54000–72000 BTU / 54K–72K | Large split AC installation |
| 3/8 + 7/8 | 6.0 ton – 8.0 ton / 6P – 8P | 72000–96000 BTU / 72K–96K | High-capacity ductless HVAC system |
Why Choose 50 ft 1/4" x 3/8" HVAC Installation Kit from DABUND?
Complete HVAC Solution in One Package
Combining refrigerant lines with essential installation accessories helps save time, reduce parts shortages, and ensure every installation has the right components.
Factory Insulation Enhances System Performance
Pre-insulated lines retain refrigerant temperature more effectively than field-wrapped alternatives, improving consistency and reducing condensation risk.
Professional-Grade Quality and Durability
Made from high-purity copper and factory insulation, this kit supports reliable HVAC performance and long-lasting operation for contractors, installers, and project buyers.
DABUND Factory
We produce insulated copper pipe, mini split line set, aluminum pipe, and HVAC parts for global HVAC customers.
SGS Certificate
DABUND mini split line set insulation can be made of polypropylene or black rubber with UV resistance and can meet ASTM E84, UL94, ASTM D1056, and ASTM G21 standards according to product specification.
Exhibition
DABUND joins HVAC exhibitions worldwide to help customers evaluate mini split line sets, HVAC installation kits, insulated copper pipes, and HVAC parts face to face.
FAQ
What does 1/4" x 3/8" refer to?
It refers to the outer diameters of the two copper refrigerant lines: 1/4" liquid line for refrigerant feed and 3/8" suction line for vapor return. This is a common configuration for small mini split systems.
What HVAC system size is this kit commonly used for?
A 1/4" x 3/8" line set is commonly used for 9,000–12,000 BTU mini split systems or 0.75–1.0 ton systems. Final selection should follow the HVAC equipment manufacturer’s installation manual.
Are the copper lines insulated?
Yes. The copper lines come with factory-applied insulation, which improves thermal performance, reduces condensation, and eliminates extra field wrapping in most installations.
Can this HVAC installation kit be used outdoors?
Yes. The insulated copper line set can be used outdoors when the selected insulation specification matches the installation environment and local HVAC requirements.
Is this kit compatible with R410A HVAC systems?
Yes. This installation kit can support common refrigerants such as R410A and R32 when the copper pipe size, wall thickness, pressure rating, and HVAC system requirements match.
What is included in this 50 ft HVAC installation kit?
The kit includes a 50 ft pre-insulated copper line set, communication wiring cable, condensate drain hose, wall pipe, decorative cover, flare nuts, and installation fittings.
Can DABUND print my logo or brand on the kit?
Yes. DABUND supports OEM and ODM services, including logo printing, insulation color customization, custom packaging, custom line set length, and private label supply.
What are your payment terms?
Payment terms can include TT, L/C at sight, credit card, and other agreed payment methods depending on order details and customer requirements.
What are your delivery terms?
Delivery terms can include EXW, FOB, CFR, CIF, and other international trade terms according to buyer logistics requirements.
Are you a trading company or manufacturer?
DABUND is a manufacturer of HVAC installation kits, mini split line sets, insulated copper pipes, aluminum pipes, and HVAC parts.
Can I get a sample before bulk order?
Yes. DABUND can send 3 pieces of free samples. The buyer only needs to cover the express cost.
How long is your delivery time?
Normal delivery time is usually 15–20 days. For urgent orders, DABUND can arrange production and delivery in advance when capacity allows.
