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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
10 Ft 1/4" x 3/8" Mini Split Line Set
DABUND 10 ft 1/4" x 3/8" Mini Split Line Set is a short-length pre-insulated copper refrigerant piping solution for compatible ductless mini split air conditioners, heat pumps and split HVAC systems.
The paired copper tubing includes a 1/4" tube and a 3/8" tube, equivalent to approximately 6.35 mm and 9.52 mm outside diameter. The coil length is 10 ft, approximately 3.048 m.
On compatible mini split equipment, the 1/4" tube commonly functions as the liquid line while the 3/8" tube functions as the suction or gas line. Exact refrigerant piping dimensions must always be verified against the installation manual for the specific indoor and outdoor equipment combination.
High-purity copper tubing is combined with factory-applied black rubber insulation for thermal protection and condensation control. ASTM B280 and C12200 DHP copper specifications are available according to the ordered configuration.
Quick Answer: This product is a 10 ft / 3.048 m pre-insulated mini split line set containing 1/4" and 3/8" copper tubing, approximately 6.35 mm and 9.52 mm OD, for compatible short-run HVAC installations.
Compatibility Notice: Do not select a mini split line set only by BTU capacity, tonnage or brand. Confirm the required pipe sizes, minimum and maximum piping length, refrigerant type and equipment installation requirements before purchase.
10 Ft 1/4" x 3/8" Line Set Specifications
| Brand | DABUND |
| Product Type | Pre-Insulated Mini Split Refrigerant Line Set |
| Copper Tube Size | 1/4" + 3/8" |
| Metric Outside Diameter | Approx. 6.35 mm + 9.52 mm |
| Common Line Function | 1/4" liquid line + 3/8" suction/gas line on compatible equipment |
| Length | 10 ft / approx. 3.048 m |
| Copper Material | High-purity copper / C12200 DHP according to specification |
| Copper Tube Standard | ASTM B280 specification available |
| Displayed Insulation | Black rubber closed-cell insulation |
| Insulation Thickness Options | 8 mm / 9 mm / 10 mm / 13 mm / 19 mm / 25.4 mm |
| Selected Temperature Range | Approx. -40°C to 120°C depending on insulation specification |
| Applications | Compatible mini split AC, heat pump and split HVAC systems |
| OEM / ODM | Length, insulation, printing, branding and packaging customization |
Key Features of the 10 Ft Mini Split Line Set
1/4" Liquid Line and 3/8" Suction Line
On compatible mini split systems, the smaller 1/4" copper tube commonly serves as the liquid refrigerant line while the larger 3/8" tube serves as the suction or gas return line.
Their approximate outside diameters are 6.35 mm and 9.52 mm. Because refrigerant pipe requirements vary between equipment models, both dimensions should be confirmed before ordering.
Compact 10 Ft Length for Short HVAC Runs
The 10 ft / 3.048 m line set is intended for compatible installations where the indoor and outdoor units are positioned relatively close together.
Compared with longer 25 ft, 50 ft or 75 ft coils, a correctly selected 10 ft line can reduce unnecessary excess tubing and simplify routing in compact installations.
C12200 DHP Copper Tubing
High-purity copper provides good formability, thermal conductivity and corrosion resistance for professional HVAC refrigerant piping.
ASTM B280 and C12200 DHP specifications are available according to the ordered configuration. Buyers requiring a specific tube wall thickness or pressure performance should confirm the applicable technical data before production.
Factory-Applied Black Rubber Insulation
The displayed product configuration uses factory-applied black rubber insulation to provide thermal protection and help control condensation around the copper refrigerant tubing.
Multiple Insulation Thickness Options
Available insulation thicknesses include 8 mm, 9 mm, 10 mm, 13 mm, 19 mm and 25.4 mm according to the selected product configuration.
OEM Printing and Private Label Supply
Company name, copper tube dimensions, coil length and other product identification can be printed on the insulation for HVAC distributors, importers and private-label brands.
High-Purity Copper
Black Rubber Insulation
Protective Plastic Caps
Black Rubber Insulation
Closed-cell black rubber insulation helps reduce unwanted heat transfer and moisture penetration while supporting condensation control around refrigerant copper tubing.
Closed-cell structure for moisture resistance
Thermal protection for refrigerant piping
Helps reduce surface condensation
Flexible construction for installation routing
UV-resistant configurations available
Multiple insulation thickness options
Selected configurations with temperature ranges from approximately -40°C to 120°C
Thermal Protection
The closed-cell insulation structure helps reduce heat transfer between refrigerant tubing and surrounding air.
Condensation Control
Black rubber insulation helps limit water-vapor penetration and surface condensation. Insulation joints and repaired sections should be properly sealed during installation.
Flexible Routing
Flexible insulation allows the line set to be routed through wall penetrations and other installation spaces while helping protect the copper tubing during handling.
UV-Resistant Options
UV-resistant insulation configurations are available for outdoor sections of refrigerant piping. Additional protective covers may be used where greater weather or mechanical protection is required.
Insulation Testing Options
Available insulation configurations include testing related to ASTM E84, UL 94, ASTM D1056, ASTM G21, ASTM C1427 and UL 723 according to the selected material specification. Buyers should confirm applicable documentation for the exact product being ordered.
Why Choose a 10 Ft Mini Split Line Set?
A 10 ft line set is useful for compatible short-run installations where the indoor and outdoor units are located relatively close together.
Selecting a shorter line set can reduce unnecessary excess copper tubing and insulation when a longer 25 ft or 50 ft coil is not required.
A shorter refrigerant route can also simplify line-set organization where equipment placement allows a compact installation.
Installation Considerations for a 10 Ft Refrigerant Line
Verify the Required 1/4" x 3/8" Pipe Sizes
Confirm that the exact equipment requires approximately 6.35 mm and 9.52 mm outside-diameter refrigerant tubing. Similar-capacity mini split systems may specify different pipe sizes.
Check the Manufacturer's Minimum Line Length
Some HVAC manufacturers specify a minimum refrigerant piping length even when the indoor and outdoor units are installed close together. Confirm that a 10 ft / 3.048 m line set satisfies the minimum piping requirement for the exact equipment model.
Do Not Remove Excess Tubing Without Checking the Manual
Refrigerant piping should not be shortened below the equipment manufacturer's permitted minimum length. Follow the installation manual before cutting or modifying the line set.
Protect the Insulation at Wall Penetrations
Use suitable protection where the insulated line set passes through walls or structural openings to reduce abrasion and damage to the insulation.
Follow Refrigerant Charging Instructions
Follow the HVAC manufacturer's specified refrigerant charge and piping instructions. Do not assume a shorter line set automatically requires refrigerant removal.
Is 1/4" x 3/8" Compatible With My Mini Split?
The 1/4" x 3/8" refrigerant line combination is commonly used by selected smaller-capacity ductless mini split air conditioners and heat pumps.
Some equipment around 9,000–12,000 BTU may use these pipe dimensions, but this is not a universal sizing rule.
Always verify the liquid-line and suction-line sizes specified for the exact indoor and outdoor equipment combination before ordering.
Applications of the 10 Ft Mini Split Line Set
Short-Run Mini Split Installations
Suitable for compatible installations where the indoor air handler and outdoor condenser or heat pump are located relatively close together.
Through-Wall Installations
A 10 ft line set can be useful for selected through-wall or adjacent-wall installations where only a limited refrigerant piping route is required.
Residential Mini Split Air Conditioners
Designed for compatible residential ductless mini split systems requiring 1/4" and 3/8" refrigerant tubing.
Heat Pump Systems
Can be supplied for compatible heat pump equipment using this paired copper tube size and permitted short-run piping length.
Available Mini Split Line Set Sizes
| Size | Length Options | Black Rubber Insulation | Flame-Resistant Options |
| 1/4 + 3/8 | Current SKU: 10 ft / 3.048 m; additional 15m / 20m / 25m / 30m / 50m options | 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 |
10 Ft Mini Split Line Set for HVAC Distributors
DABUND supplies pre-insulated copper line sets to HVAC distributors, wholesalers, importers, contractors, project suppliers and private-label brands.
The 10 ft 1/4" x 3/8" configuration provides a short-length stocking option for buyers serving compatible mini split and heat pump installations where indoor and outdoor equipment are installed relatively close together.
OEM and Custom Mini Split Line Set Supply
DABUND supports OEM and ODM production for HVAC distributors, importers and private-label brands.
Custom copper tube combinations
Custom coil lengths
Multiple insulation thicknesses
Company name and specification printing
Private-label packaging
Custom product identification
Bulk supply for distributors and project buyers
Why Choose DABUND Mini Split Line Sets?
HVAC Manufacturing Experience Since 2008
DABUND has manufactured HVAC components since 2008, supplying refrigerant line sets, insulated copper tubing and related HVAC products to international customers.
Multiple Sizes and Lengths
Multiple copper tube combinations, coil lengths and insulation thicknesses allow distributors to source different refrigerant piping configurations according to installation and market requirements.
OEM and Private-Label Support
Insulation printing, product identification and packaging can be customized for HVAC brands, wholesalers and distributors.
DABUND Factory and Export Packaging
DABUND manufactures insulated copper pipe, mini split line sets and related HVAC components for international B2B customers.
SGS Testing and Insulation Standards
Available insulation configurations include testing related to ASTM E84, UL 94, ASTM D1056 and ASTM G21 according to the selected material specification. Buyers should confirm applicable documentation for the exact insulation configuration being ordered.
International HVAC Exhibitions
DABUND participates in international HVAC exhibitions to present mini split line sets, insulated copper tubing and related HVAC products to distributors, importers and professional buyers.
Frequently Asked Questions
What is a 10 ft 1/4" x 3/8" mini split line set?
It is a paired refrigerant piping system containing 1/4" and 3/8" outside-diameter copper tubing with pre-applied insulation. The coil length is approximately 10 ft or 3.048 m.
What are the metric sizes of 1/4" and 3/8" copper tubing?
A 1/4" copper tube has an outside diameter of approximately 6.35 mm, while a 3/8" copper tube has an outside diameter of approximately 9.52 mm.
Which tube is the liquid line and which is the suction line?
On compatible systems, the 1/4" tube commonly serves as the liquid line and the 3/8" tube as the suction or gas line. Always verify the exact equipment piping specification.
What mini split capacity uses a 1/4" x 3/8" line set?
Some mini split systems around 9,000–12,000 BTU may use this line combination, but this is not universal. Similar-capacity equipment can require different refrigerant pipe dimensions.
Can I select the line set by BTU or tonnage alone?
No. Refrigerant pipe sizing depends on equipment design, refrigerant type, piping length and manufacturer requirements.
When should I choose a 10 ft mini split line set?
A 10 ft line set is appropriate only when the actual refrigerant piping route is short and the equipment manufacturer permits approximately 3.048 m of piping.
Is 10 ft too short for some mini split systems?
Yes. Some HVAC systems specify a minimum refrigerant line length. Always confirm the manufacturer's minimum piping requirement before selecting or cutting a 10 ft line set.
Should refrigerant be removed when using a shorter line?
Do not assume refrigerant should be removed because the line is shorter. Follow the manufacturer's factory-charge and piping instructions for the exact equipment model.
What insulation is shown on this product?
The displayed configuration uses black rubber closed-cell insulation designed to provide thermal protection and help control condensation around the refrigerant tubing.
What insulation thicknesses are available?
Available insulation thickness options include 8 mm, 9 mm, 10 mm, 13 mm, 19 mm and 25.4 mm depending on the selected configuration.
Is UV-resistant insulation available?
Yes. UV-resistant insulation configurations are available for refrigerant piping sections installed outdoors.
What pressure rating does the copper tubing have?
Allowable working and test pressure depends on tube diameter, wall thickness, copper specification and ordered configuration. Buyers requiring a specific pressure rating should confirm the applicable technical data before ordering.
Can DABUND customize the mini split line set?
Yes. OEM and ODM options include copper tube combinations, coil lengths, insulation thickness, insulation printing, product identification and private-label packaging.
Can I get samples before placing a bulk order?
Yes. According to the current product information, DABUND can provide three sample pieces for evaluation, with the buyer covering express shipping costs. View sample information.
What payment terms are available?
Available payment methods can include T/T, L/C at sight and credit card. Final payment terms depend on the commercial agreement.
What delivery terms are available?
International trade terms can include EXW, FOB, CFR and CIF according to the buyer's logistics requirements.
What is the typical delivery time?
Current product information lists typical delivery at approximately 15–20 days. Actual lead time depends on order quantity, product specification, customization and production schedule.
Who should install a mini split refrigerant line set?
Refrigerant piping, flare or brazed connections, pressure testing, evacuation and refrigerant charging should be completed by qualified HVAC personnel according to local requirements and the equipment manufacturer's instructions.
