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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
100 Ft 3/8" x 7/8" Mini Split Line Set
DABUND 100 ft 3/8" x 7/8" Mini Split Line Set is a long-length pre-insulated twin copper refrigerant piping solution for compatible split air conditioners, heat pumps, ductless HVAC systems and selected refrigeration applications.
The paired copper tubing includes a 3/8" tube and a 7/8" tube, equivalent to approximately 9.52 mm and 22.22 mm outside diameter. The continuous coil length is 100 ft, approximately 30.48 m.
On compatible HVAC equipment, the 3/8" tube commonly functions as the liquid refrigerant line while the 7/8" tube functions as the suction or gas return line. Exact refrigerant piping dimensions must be verified against the installation specifications 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 100 ft / 30.48 m mini split line set containing 3/8" and 7/8" pre-insulated copper tubing, approximately 9.52 mm and 22.22 mm OD, for compatible long-run HVAC installations.
Long-Line Compatibility Notice: A 100 ft refrigerant run is not suitable for every mini split or heat pump. Confirm maximum actual piping length, equivalent piping length, vertical separation, required pipe diameter, refrigerant charge and any manufacturer-specified long-line requirements before installation.
100 Ft 3/8" x 7/8" Line Set Specifications
| Brand | DABUND |
| Product Type | Pre-Insulated Mini Split Refrigerant Line Set |
| Copper Tube Size | 3/8" + 7/8" |
| Metric Outside Diameter | Approx. 9.52 mm + 22.22 mm |
| Common Line Function | 3/8" liquid line + 7/8" suction/gas line on compatible equipment |
| Length | 100 ft / approx. 30.48 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, split HVAC and selected refrigeration systems |
| OEM / ODM | Length, insulation, printing, branding and packaging customization |
Key Features of the 100 Ft Mini Split Line Set
3/8" Liquid Line and 7/8" Suction Line
On compatible HVAC systems, the smaller 3/8" copper tube commonly serves as the liquid line while the larger 7/8" tube serves as the suction or gas return line.
Their approximate outside diameters are 9.52 mm and 22.22 mm. Because refrigerant piping requirements vary between equipment models, both tube sizes should be verified before purchasing the line set.
100 Ft Continuous Refrigerant Piping
The 100 ft / 30.48 m continuous coil is designed for compatible HVAC installations requiring substantially more routing distance than typical short or medium-length line sets.
Where the HVAC equipment manufacturer permits a 100 ft refrigerant run, a continuous coil can reduce intermediate piping joints compared with joining several shorter copper 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 configuration uses factory-applied black rubber insulation to provide thermal protection and help control condensation around refrigerant copper 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 and project requirements.
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, wholesalers, importers and private-label brands.
High-Purity Copper
Black Rubber Insulation
Protective Plastic Caps
Black Rubber Insulation for Long Refrigerant Runs
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 long routing paths
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 throughout the piping route.
Condensation Control
Black rubber insulation helps reduce water-vapor penetration and surface condensation. Insulation joints, damaged areas and field connections should be properly sealed during installation.
Flexible Long-Run Routing
Flexible insulation helps contractors route long refrigerant lines through walls, ceilings, attics, service shafts and mechanical spaces while protecting the copper tubing during installation.
UV-Resistant Options
UV-resistant insulation configurations are available for outdoor refrigerant piping sections. Additional 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 configuration being ordered.
Why Choose a 100 Ft Mini Split Line Set?
A 100 ft line set is intended for compatible installations where indoor and outdoor HVAC equipment are separated by a substantially longer piping route than standard residential installations.
The 30.48 m continuous coil can be useful where refrigerant piping must travel across larger buildings, through multiple service spaces, around structural obstacles or between equipment installed at different locations.
A continuous long coil may reduce intermediate joints, but the equipment manufacturer must permit the actual and equivalent refrigerant piping length before a 100 ft line set is used.
100 Ft Long-Line Installation Considerations
Verify the Required 3/8" x 7/8" Pipe Sizes
Confirm that the exact indoor and outdoor HVAC equipment requires approximately 9.52 mm and 22.22 mm outside-diameter refrigerant tubing. Do not determine pipe size only from system capacity.
Confirm the Maximum Actual Piping Length
Verify that the equipment manufacturer permits approximately 100 ft / 30.48 m of actual refrigerant piping. Some systems have maximum piping limits below this length.
Calculate Equivalent Piping Length
Elbows, bends and other routing conditions may increase the equivalent refrigerant piping length beyond the measured physical distance. Follow the equipment manufacturer's equivalent-length calculation method where specified.
Check Maximum Vertical Separation
Long refrigerant runs often involve equipment installed at different elevations. Confirm the maximum allowable vertical separation between indoor and outdoor units for the exact HVAC model.
Confirm Additional Refrigerant Charge
Many HVAC systems include a factory refrigerant charge for only a specified standard line length. A 100 ft installation may require additional refrigerant according to the equipment manufacturer's charging instructions.
Review Long-Line Installation Requirements
Some equipment manufacturers specify additional requirements for long refrigerant runs. Review the installation manual for any required piping practices, accessories or operating limitations before installation.
Support Long Horizontal and Vertical Sections
Long refrigerant lines should be properly supported to reduce sagging, vibration and mechanical stress on the copper tubing, insulation and field connections.
Protect Insulation at Structural Penetrations
Use suitable sleeves, grommets or other protection where the insulated copper tubing passes through walls, floors, roofs or structural openings.
Is 3/8" x 7/8" Compatible With My Mini Split?
The 3/8" x 7/8" refrigerant piping combination is used by selected higher-capacity split air conditioners, heat pumps and ductless HVAC systems.
Some systems in approximately 72,000–96,000 BTU classes may use these dimensions, but this is not a universal sizing rule.
Equipment with similar nominal capacity can require different refrigerant pipe sizes. Always verify the liquid-line and suction-line specifications for the exact equipment model.
Applications of the 100 Ft Mini Split Line Set
Long-Run Split Air Conditioning Systems
Suitable for compatible split-system air conditioners where the equipment manufacturer permits a long refrigerant piping route using 3/8" and 7/8" tubing.
Heat Pump Systems
Can be supplied for compatible heat pump installations requiring this paired refrigerant tube combination and longer piping distance.
Ductless and Mini Split HVAC Systems
Suitable for selected ductless systems where the manufacturer's specified refrigerant pipe dimensions and maximum line length match this configuration.
Commercial HVAC Projects
The 100 ft continuous coil provides routing flexibility for compatible commercial HVAC projects where indoor and outdoor equipment are positioned a significant distance apart.
Multi-Level Building Installations
A longer line set may be useful in compatible multi-level installations, provided that the equipment manufacturer's maximum piping length and vertical separation limits are followed.
Selected Refrigeration Applications
The insulated copper tubing can also be supplied for selected refrigeration applications where tube diameter, wall thickness, insulation and operating requirements match the system design.
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 | 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 | Current SKU: 100 ft / 30.48 m; broader production options include 15m / 20m / 25m / 30m / 50m | 8mm / 9mm / 10mm / 13mm / 19mm / 25.4mm | M1 / B1 |
100 Ft Mini Split Line Set for HVAC Distributors
DABUND supplies pre-insulated copper line sets to HVAC distributors, wholesalers, importers, contractors, engineering companies, project suppliers and private-label brands.
The 100 ft 3/8" x 7/8" configuration provides a long-length stocking option for buyers serving compatible HVAC and heat pump installations where extended refrigerant piping is required.
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 mini split line sets, copper 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 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 100 ft 3/8" x 7/8" mini split line set?
It is a paired refrigerant piping system containing 3/8" and 7/8" outside-diameter copper tubing with pre-applied insulation. The continuous coil length is approximately 100 ft or 30.48 m.
What are the metric sizes of 3/8" and 7/8" copper tubing?
The product information lists approximately 9.52 mm outside diameter for the 3/8" tube and approximately 22.22 mm for the 7/8" tube.
Which tube is the liquid line and which is the suction line?
On compatible equipment, the 3/8" tube commonly functions as the liquid line and the 7/8" tube as the suction or gas line. Always verify the equipment manufacturer's piping specification.
What HVAC capacity uses a 3/8" x 7/8" line set?
Some higher-capacity systems in approximately 72,000–96,000 BTU classes may use this pipe 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, actual piping length, equivalent piping length, vertical separation and manufacturer specifications.
Can every mini split use a 100 ft line set?
No. A 100 ft / 30.48 m refrigerant run must fall within the maximum piping length permitted by the exact equipment manufacturer and model.
What is the difference between actual and equivalent line length?
Actual length is the measured tubing route, while equivalent length may also account for bends and other piping conditions according to the equipment manufacturer's calculation method.
Does a 100 ft mini split line set require additional refrigerant?
It may. Many HVAC systems are factory charged for only a specified standard line length. Follow the manufacturer's instructions to determine whether additional refrigerant is required for a 100 ft installation.
Does vertical separation matter on a 100 ft installation?
Yes. Equipment manufacturers typically specify allowable vertical separation between indoor and outdoor units. Verify this limit before planning a long refrigerant run.
Are there special requirements for long refrigerant lines?
Some HVAC equipment has additional long-line installation requirements. Review the installation documentation for the exact system before installing a 100 ft refrigerant line.
What insulation is shown on this line set?
The displayed product configuration uses black rubber closed-cell insulation designed to provide thermal protection and help control condensation around 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 copper tube diameter, wall thickness, material 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, printed 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 100 ft refrigerant line set?
Refrigerant piping, flare or brazed connections, pressure testing, evacuation, refrigerant charging and long-line setup should be completed by qualified HVAC personnel according to local requirements and the equipment manufacturer's instructions.
