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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
50 Ft 3/8" x 7/8" Copper Line Set
DABUND 50 ft 3/8" x 7/8" Copper Line Set is a pre-insulated twin copper refrigerant piping solution for compatible split air conditioners, heat pumps, ductless 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 50 ft, approximately 15.24 m.
On compatible HVAC systems, 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 pipe dimensions should always be verified against the installation specification 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 50 ft / 15.24 m copper line set containing 3/8" and 7/8" pre-insulated copper tubing, approximately 9.52 mm and 22.22 mm OD, for compatible HVAC and heat pump installations.
Compatibility Notice: Do not select refrigerant piping only by BTU capacity, tonnage or equipment brand. Confirm liquid-line size, suction-line size, maximum piping length, vertical separation, refrigerant type and charging requirements for the exact equipment model.
50 Ft 3/8" x 7/8" Copper Line Set Specifications
| Brand | DABUND |
| Product Type | Pre-Insulated Copper 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 systems |
| Length | 50 ft / approx. 15.24 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 split AC, heat pump, ductless HVAC and selected refrigeration systems |
| OEM / ODM | Length, insulation, printing, branding and packaging customization |
Key Features of the 3/8" x 7/8" Copper Line Set
3/8" Liquid Line and 7/8" Suction Line
On compatible HVAC equipment, the smaller 3/8" copper tube commonly serves as the liquid refrigerant 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. Refrigerant piping requirements vary between equipment models, so both dimensions should be verified before ordering.
50 Ft Continuous Copper Tubing
The 50 ft / 15.24 m continuous coil provides additional routing flexibility where indoor and outdoor equipment are positioned farther apart than a short line set can accommodate.
Where permitted by the equipment manufacturer, one continuous coil can reduce intermediate refrigerant piping joints compared with connecting several shorter copper sections.
C12200 DHP Copper Tubing
High-purity copper provides good formability, thermal conductivity and corrosion resistance for professional HVAC and refrigeration piping applications.
ASTM B280 and C12200 DHP specifications are available according to the ordered configuration. Buyers requiring a specific 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 the copper refrigerant tubing.
Multiple Insulation Thickness Options
Available black rubber 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, wholesalers, importers and private-label brands.
High-Purity Copper
Black Rubber Insulation
Protective Plastic Caps
Black Rubber Insulation for Copper Line Sets
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 routing through building spaces
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 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 Installation
Flexible insulation helps installers route the copper line set through walls, ceilings, attics, service spaces and mechanical areas while protecting the copper surface.
UV-Resistant Options
UV-resistant insulation configurations are available for outdoor sections of refrigerant piping. Additional protective line 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 50 Ft Copper Line Set?
A 50 ft copper line set provides additional routing distance for compatible HVAC installations where shorter refrigerant piping is insufficient but a 75 ft or 100 ft coil is unnecessary.
The 15.24 m continuous coil can be useful where indoor and outdoor equipment are separated by building layout, equipment access requirements or longer horizontal routing.
Where permitted by the equipment manufacturer, one continuous copper line set can reduce intermediate joints compared with joining several shorter piping sections.
Installation Considerations for a 50 Ft Copper Line Set
Verify the Required 3/8" x 7/8" Pipe Sizes
Confirm that the exact HVAC equipment requires approximately 9.52 mm and 22.22 mm outside-diameter refrigerant tubing. Similar-capacity equipment can use different line sizes.
Check Maximum Actual Piping Length
Confirm that the equipment manufacturer permits approximately 50 ft / 15.24 m of actual refrigerant piping. Maximum allowable piping length varies by model.
Check Equivalent Piping Length
Bends and routing conditions may increase equivalent piping length. Follow the equipment manufacturer's calculation method where an equivalent-length limit is specified.
Confirm Vertical Separation
If indoor and outdoor HVAC equipment are installed at different elevations, verify the manufacturer's maximum permitted vertical separation.
Check Additional Refrigerant Requirements
Some systems include a factory refrigerant charge for only a specified standard piping length. A 50 ft installation may require additional refrigerant according to the manufacturer's charging instructions.
Support and Protect the Copper Piping
Long horizontal and vertical sections should be properly supported to reduce sagging, vibration and mechanical stress. Protect the insulation where the line set passes through structural openings.
Is 3/8" x 7/8" Compatible With My HVAC System?
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 liquid-line and suction-line sizes. Always verify the exact equipment specification before purchasing.
Applications of the 50 Ft 3/8" x 7/8" Copper Line Set
Split Air Conditioning Systems
Suitable for compatible split-system air conditioners that specifically require 3/8" and 7/8" refrigerant tubing.
Heat Pump Systems
Can be supplied for compatible heat pump installations using this paired refrigerant tube combination.
Ductless and Mini Split HVAC Systems
Suitable for selected ductless or mini split systems where the manufacturer's specified refrigerant piping dimensions match this line set.
Commercial HVAC Projects
The 50 ft coil provides additional routing flexibility for compatible commercial installations where indoor and outdoor HVAC equipment are positioned farther apart.
Selected Refrigeration Applications
The insulated copper tubing can also be supplied for selected refrigeration applications where tube size, wall thickness, insulation and operating requirements match the system design.
Available Copper 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: 50 ft / 15.24 m; broader production options include 15m / 20m / 25m / 30m / 50m | 8mm / 9mm / 10mm / 13mm / 19mm / 25.4mm | M1 / B1 |
Copper Line Sets for HVAC Distributors and Contractors
DABUND supplies pre-insulated copper line sets to HVAC distributors, wholesalers, importers, contractors, engineering companies, project suppliers and private-label brands.
The 50 ft 3/8" x 7/8" configuration provides a stocking option for buyers serving compatible split-system, heat pump and higher-capacity HVAC installations.
OEM and Custom Copper 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 Copper Line Sets?
HVAC Manufacturing Experience Since 2008
DABUND has manufactured HVAC components since 2008, supplying copper line sets, mini split 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 market and project 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, copper 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 copper line sets, insulated copper tubing and related HVAC products to distributors, importers and professional buyers.
Frequently Asked Questions
What is a 50 ft 3/8" x 7/8" copper line set?
It is a paired refrigerant piping system containing 3/8" and 7/8" outside-diameter copper tubing with pre-applied insulation. The coil length is approximately 50 ft or 15.24 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 HVAC 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" copper 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 copper line set by BTU or tonnage alone?
No. Refrigerant pipe sizing depends on equipment design, refrigerant type, piping length, vertical separation and manufacturer specifications.
Why choose a 50 ft copper line set?
A 50 ft line set provides additional routing distance where shorter piping is insufficient and may reduce intermediate joints when the equipment permits a continuous 50 ft run.
Can every HVAC system use a 50 ft refrigerant line?
No. Maximum actual and equivalent refrigerant piping lengths vary by manufacturer and model. Confirm that the exact equipment permits approximately 50 ft / 15.24 m of piping.
Does a 50 ft copper line set require additional refrigerant?
It may. Some HVAC systems include a factory refrigerant charge for only a specified standard piping length. Follow the manufacturer's charging instructions for the exact equipment model.
What insulation is shown on this copper line set?
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 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 copper 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 copper 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.
