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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
30 Ft 1/4" x 5/8" Mini Split Line Set
DABUND 30 ft 1/4" x 5/8" Mini Split Line Set is a pre-insulated twin 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 5/8" tube, equivalent to approximately 6.35 mm and 15.88 mm outside diameter. The coil length is 30 ft, approximately 9.144 m.
On compatible HVAC equipment, the 1/4" tube commonly functions as the liquid line while the 5/8" tube functions as the suction or gas line. Exact refrigerant piping dimensions should 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 30 ft / 9.144 m pre-insulated mini split line set containing 1/4" and 5/8" copper tubing, approximately 6.35 mm and 15.88 mm OD, for compatible HVAC installations.
Compatibility Notice: Do not select a line set only by BTU capacity, tonnage or equipment brand. Confirm the required liquid-line size, suction-line size, permitted piping length, vertical separation, refrigerant type and charging requirements for the exact equipment model.
30 Ft 1/4" x 5/8" Line Set Specifications
| Brand | DABUND |
| Product Type | Pre-Insulated Mini Split Refrigerant Line Set |
| Copper Tube Size | 1/4" + 5/8" |
| Metric Outside Diameter | Approx. 6.35 mm + 15.88 mm |
| Common Line Function | 1/4" liquid line + 5/8" suction/gas line on compatible equipment |
| Length | 30 ft / approx. 9.144 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 30 Ft Mini Split Line Set
1/4" Liquid Line and 5/8" Suction Line
On compatible mini split systems, the smaller 1/4" copper tube commonly serves as the liquid refrigerant line while the larger 5/8" tube serves as the suction or gas return line.
Their approximate outside diameters are 6.35 mm and 15.88 mm. Because refrigerant pipe requirements vary between HVAC models, both dimensions should be verified before ordering.
30 Ft Continuous Refrigerant Piping
The 30 ft / 9.144 m continuous coil provides a practical intermediate length for installations where a very short line set is insufficient but a 50 ft or longer coil is unnecessary.
Where permitted by the equipment manufacturer, a continuous copper coil can reduce intermediate refrigerant-line joints compared with connecting multiple shorter tubing sections.
C12200 DHP Copper Tubing
High-purity copper provides good formability, thermal conductivity and corrosion resistance for professional HVAC refrigerant piping applications.
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 black rubber closed-cell 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 configuration and project requirements.
OEM Printing and Private Label Supply
Company name, copper tube dimensions, coil length and other product information 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 for Refrigerant Piping
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 structure helps reduce heat transfer between the refrigerant tubing and surrounding air.
Condensation Control
Black rubber insulation helps reduce water-vapor penetration and surface condensation. Insulation joints and repaired sections should be properly sealed during installation.
Flexible Routing
Flexible insulation helps installers route the line set through walls, ceilings, attics and mechanical spaces while protecting the copper tubing during normal handling.
UV-Resistant Options
UV-resistant insulation configurations are available for refrigerant piping installed outdoors. Additional protective line-set 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 30 Ft Mini Split Line Set?
A 30 ft mini split line set provides a practical intermediate length for compatible HVAC installations where 10 ft or 20 ft piping is insufficient but a 50 ft coil would create unnecessary excess tubing.
The 9.144 m coil provides additional routing flexibility where the refrigerant line must pass through walls, ceilings, attics or service spaces before reaching the outdoor unit.
Correctly matching line-set length to the actual installation route can help reduce unused copper tubing and simplify line-set organization.
Installation Considerations for a 30 Ft Line Set
Verify the Required 1/4" x 5/8" Pipe Sizes
Confirm that the exact mini split or heat pump equipment requires approximately 6.35 mm and 15.88 mm outside-diameter refrigerant tubing.
Check Maximum and Minimum Piping Length
Verify that approximately 30 ft / 9.144 m falls within the equipment manufacturer's permitted refrigerant piping range. Some systems specify both minimum and maximum line lengths.
Check Equivalent Piping Length
Bends and routing conditions may affect equivalent piping length. Follow the equipment manufacturer's calculation method where applicable.
Verify Vertical Separation
Where indoor and outdoor equipment are installed at different elevations, confirm the maximum permitted vertical separation for the exact HVAC system.
Confirm Refrigerant Charging Requirements
Some systems include a factory refrigerant charge for only a specified standard piping length. Follow the manufacturer's charging instructions for a 30 ft installation.
Protect Insulation at Structural Penetrations
Use suitable sleeves, grommets or other protective materials where insulated copper tubing passes through walls, floors or structural openings.
Is 1/4" x 5/8" Compatible With My Mini Split?
The 1/4" x 5/8" refrigerant line combination is used by selected mini split air conditioners, heat pumps and split HVAC systems.
Some systems in approximately 24,000–30,000 BTU classes may specify these dimensions, but this is not a universal sizing rule.
Equipment with similar nominal capacity can use different refrigerant pipe sizes. Always verify the exact liquid-line and suction-line requirements before ordering.
Applications of the 30 Ft 1/4" x 5/8" Line Set
Ductless Mini Split Air Conditioners
Suitable for compatible ductless mini split systems that specifically require 1/4" and 5/8" refrigerant tubing.
Heat Pump Systems
Can be supplied for compatible heat pump systems requiring this paired refrigerant tube combination.
Residential HVAC Installations
The 30 ft length provides additional routing flexibility for residential HVAC installations where indoor and outdoor equipment are moderately separated.
Light-Commercial HVAC Projects
Suitable for compatible light-commercial installations where refrigerant tube dimensions, line length and insulation requirements match this configuration.
Available Mini Split Line Set Sizes
| Size | Length Options | Black Rubber Insulation | Flame-Resistant Options |
| 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 | Current SKU: 30 ft / 9.144 m; broader production options include 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 |
30 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 30 ft 1/4" x 5/8" configuration provides a mid-length stocking option for buyers serving compatible mini split and heat pump installations where shorter line sets do not provide sufficient routing distance.
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, Lengths and Insulation Options
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 the 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 30 ft 1/4" x 5/8" mini split line set?
It is a paired refrigerant piping system containing 1/4" and 5/8" outside-diameter copper tubing with pre-applied insulation. The coil length is approximately 30 ft or 9.144 m.
What are the metric sizes of 1/4" and 5/8" copper tubing?
A 1/4" copper tube has an outside diameter of approximately 6.35 mm, while a 5/8" copper tube has an outside diameter of approximately 15.88 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 5/8" tube as the suction or gas line. Always verify the equipment manufacturer's piping specification.
What mini split capacity uses a 1/4" x 5/8" line set?
Some systems in approximately 24,000–30,000 BTU classes may use this pipe combination, but this is not universal. Similar-capacity equipment can require different refrigerant pipe dimensions.
Can I choose the line set by BTU or tonnage alone?
No. Refrigerant pipe sizing depends on equipment design, refrigerant type, piping length, vertical separation and manufacturer specifications.
When should I choose a 30 ft mini split line set?
A 30 ft line set is useful where shorter line sets do not provide enough routing distance but a 50 ft or longer coil would create unnecessary excess tubing.
Can every mini split use a 30 ft line set?
No. Verify that 30 ft / 9.144 m falls within the minimum and maximum refrigerant piping limits specified for the exact equipment model.
Does a 30 ft line require additional refrigerant?
It depends on the equipment. Some systems include a factory refrigerant charge for only a specified standard piping length. Follow the manufacturer's charging instructions.
What insulation is shown on this product?
The displayed product 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 product 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.
