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DBJ-003
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DABUND
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Copper
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1M - 10M
Material
Color
Keywords
Application
35 Ft 1/4" x 3/8" Insulated Copper Pipe
DABUND 35 Ft 1/4" x 3/8" Insulated Copper Pipe is a pre-insulated copper line set for compatible HVACR and split air-conditioning systems requiring 1/4-inch and 3/8-inch refrigerant tubing.
This configuration is supplied with 1/2" Black Rubber insulation according to the current product information. Both copper tubes have factory-prepared flared ends and nuts for compatible flare-type HVAC connections.
The copper tubing is identified with ASTM B280 and C12200 DHP references. The 35 ft length provides approximately 10.67 m of tubing for installations where the equipment manufacturer permits this line length and the 1/4" x 3/8" tube combination.
Quick Answer: This product is a 35 ft 1/4" x 3/8" pre-insulated copper line set with 1/2" Black Rubber insulation, flared tube ends and nuts for compatible HVACR installations.
Compatibility Notice: The 1/4" x 3/8" combination is commonly associated in the current product range with some 9,000–12,000 BTU or approximately 0.75–1 ton systems. This is only a general reference. Always confirm the required liquid and suction line sizes from the actual HVAC equipment installation manual.
35 Ft 1/4" x 3/8" Copper Line Set Specifications
| Product Type | Pre-Insulated Copper Pipe / Copper Line Set |
| Tube Size | 1/4" x 3/8" |
| Metric Outside Diameter | 6.35 mm x 9.52 mm |
| Length | 35 ft / approximately 10.67 m |
| Insulation | 1/2" Black Rubber |
| Copper Tube Reference | ASTM B280 / C12200 DHP |
| Tube End Preparation | Flared ends with nuts |
| Black Rubber Temperature Range | -40°C to 120°C according to current product information |
| General Capacity Reference | Some 9K–12K BTU / approximately 0.75–1 ton systems; equipment manual governs actual line size |
| Typical Application | Compatible HVACR and split AC systems requiring 1/4" x 3/8" tubing |
35 Ft Pre-Insulated Copper Line Set
The 35 ft line set combines 1/4" and 3/8" copper tubing with factory-applied Black Rubber insulation for compatible HVAC installations.
Pre-insulated construction reduces the need to separately apply insulation around the refrigerant tubing at the installation site and provides a consistent insulated piping configuration.
The 35 ft length can be considered where approximately 10.67 m of refrigerant piping is required, subject to the equipment manufacturer's permitted piping length and installation requirements.
ASTM B280 and C12200 Copper Tubing
DABUND identifies the copper tubing used in this product range with ASTM B280 and C12200 DHP references for HVACR copper tube applications.
The current product imagery also identifies the tubing as all-copper construction and describes the copper as 99.9% pure.
Tube size, wall thickness and piping requirements should still be verified against the exact HVAC equipment and project specifications.
Factory-Prepared Flared Ends with Nuts
Both copper tubes are supplied with flared ends and nuts according to the current product information.
Before installation, inspect the flare surfaces and verify that the flare dimensions, nuts and connection method are compatible with the equipment service valves.
Copper Tube
Black Rubber Insulation
Flared Ends
1/2" Black Rubber Insulation
This 35 ft 1/4" x 3/8" configuration is identified with 1/2" Black Rubber insulation in the current product information.
The insulation creates a thermal and moisture-control layer around the copper tubing and helps limit condensation on the insulated refrigerant line.
The current Black Rubber product information lists a temperature range from -40°C to 120°C.
Different insulation configurations are available across the wider product range. Confirm insulation material and thickness for the exact SKU before ordering.
Black Rubber Insulation Features
Thermal Insulation
The insulation layer helps reduce heat transfer between the refrigerant tubing and the surrounding environment.
Moisture and Condensation Control
The current product information describes the insulation as providing both insulation and moisture protection to help control condensation around the copper tubing.
Temperature Range
The supplied Black Rubber insulation information lists a temperature range from -40°C to 120°C.
Test References
The current product information references ASTM E84, UL94, ASTM D1056 and ASTM G21 for insulation-related testing. Buyers requiring a particular report or classification should confirm which test documentation applies to the exact insulation configuration being ordered.
What Can Be Included with the 35 Ft Line Set?
The current product information references an installation package that may include communication wire cable, a 3 m drain hose, wall pipe, wall cover and other installation accessories.
Exact package contents should be confirmed for the 35 ft 1/4" x 3/8" SKU before ordering, particularly for distributor, contractor and project purchases.
Available Insulated Copper Line Set Sizes
DABUND supplies multiple copper tube size combinations, insulation thicknesses and line-set lengths for different HVAC installation requirements.
| Copper Tube Size | Available Lengths | Black Rubber Insulation Options | Listed Flame Class |
|---|---|---|---|
| 1/4" + 3/8" | 3 m / 4 m / 5 m / 7 m / 10 m | 8 / 9 / 10 / 13 / 19 / 25.4 mm | M1 / B1 |
| 1/4" + 1/2" | 3 m / 4 m / 5 m / 7 m / 10 m | 8 / 9 / 10 / 13 / 19 / 25.4 mm | M1 / B1 |
| 1/4" + 5/8" | 3 m / 4 m / 5 m / 7 m / 10 m | 8 / 9 / 10 / 13 / 19 / 25.4 mm | M1 / B1 |
| 3/8" + 5/8" | 3 m / 4 m / 5 m / 7 m / 10 m | 8 / 9 / 10 / 13 / 19 / 25.4 mm | M1 / B1 |
| 3/8" + 3/4" | 3 m / 4 m / 5 m / 7 m / 10 m | 8 / 9 / 10 / 13 / 19 / 25.4 mm | M1 / B1 |
| 1/2" + 3/4" | 3 m / 4 m / 5 m / 7 m / 10 m | 8 / 9 / 10 / 13 / 19 / 25.4 mm | M1 / B1 |
| 3/8" + 7/8" | 3 m / 4 m / 5 m / 7 m / 10 m | 8 / 9 / 10 / 13 / 19 / 25.4 mm | M1 / B1 |
1/4" x 3/8" Line Set for Compatible 9K–12K Systems
The current DABUND product information associates the 1/4" x 3/8" tubing combination with some approximately 0.75–1 ton or 9,000–12,000 BTU split air-conditioning systems.
This is a general product-family reference rather than a universal compatibility rule.
Different HVAC models with the same nominal BTU capacity can use different liquid and suction line sizes. Always confirm the required tubing from the equipment manufacturer's installation manual.
Important Checks for a 35 Ft Refrigerant Line
Confirm the Required Tube Sizes
Verify that the actual HVAC equipment specifically requires 1/4" and 3/8" refrigerant tubing.
Check Maximum Permitted Line Length
Confirm that a 35 ft piping route falls within the maximum refrigerant-line length permitted by the equipment manufacturer.
Check Minimum Permitted Line Length
Some HVAC systems also specify a minimum refrigerant-line length. Follow the equipment documentation if the installation route is substantially shorter than 35 ft.
Confirm Vertical Separation
If the indoor and outdoor units are installed at different elevations, verify the maximum permitted vertical separation for the specific system.
Check Additional Refrigerant Requirements
Check the factory refrigerant charge and included piping-length allowance. Some HVAC systems require additional refrigerant when the installed line exceeds the manufacturer's standard charged length.
Follow Long-Line Instructions When Applicable
If the HVAC manufacturer provides additional requirements for longer piping runs, follow those instructions for the actual installation.
How to Prepare the 35 Ft Line Set for Installation
Step 1: Verify Equipment Compatibility
Check the equipment model and confirm that 1/4" x 3/8" is the required refrigerant-line size.
Step 2: Plan the Piping Route
Measure the planned route between the indoor and outdoor units and confirm that the selected 35 ft length is appropriate.
Step 3: Inspect the Copper and Insulation
Inspect the tubing and insulation before installation and avoid sharp bends or damage while routing the line set.
Step 4: Inspect the Flared Ends
Check the factory-prepared flare surfaces and nuts before making the refrigerant connections.
Step 5: Connect According to the Equipment Manual
Follow the HVAC equipment manufacturer's flare-joint connection and tightening requirements.
Step 6: Leak Test and Evacuate
Complete the required leak testing and evacuation procedures according to the equipment manufacturer's installation instructions before system operation.
Step 7: Confirm Refrigerant Charge
Confirm whether the installed 35 ft piping length requires any refrigerant adjustment according to the equipment documentation.
HVACR Applications
The 35 ft 1/4" x 3/8" insulated copper line set can be considered for compatible HVACR systems that specifically require this copper tube combination and permit the selected piping length.
Compatible split air-conditioning systems
Compatible ductless mini split systems
Compatible heat-pump installations
HVAC installations requiring 1/4" x 3/8" refrigerant tubing
Some compatible 9K–12K BTU applications
Replacement and new-installation projects requiring approximately 35 ft of tubing
Compatibility must always be verified using the exact HVAC equipment model and installation documentation.
Information to Confirm Before Ordering
HVAC distributors, wholesalers, contractors and project buyers should confirm the following information before placing an order:
Required copper tube size: 1/4" x 3/8"
Required line-set length: 35 ft
HVAC equipment model
Minimum and maximum permitted piping length
Required insulation type and thickness
Required package accessories
Order quantity
Packaging requirements
OEM or private-label requirements
DABUND Insulated Copper Pipe Manufacturer
DABUND has produced insulated copper pipe, mini split line sets and related HVAC installation products since 2008.
Multiple copper tube size combinations, insulation configurations and line-set lengths are available for HVAC distributors, wholesalers, contractors and professional buyers.
OEM and ODM requirements can be discussed according to tubing size, insulation configuration, packaging and commercial order requirements.
DABUND Factory
DABUND produces insulated copper pipe, mini split line sets and related HVAC installation components.
Insulation Test References
The current product information references ASTM E84, UL94, ASTM D1056 and ASTM G21 for insulation-related testing.
Because different insulation configurations are available, buyers requiring a particular report or classification should confirm the applicable test documentation for the exact product being ordered.
Exhibition
DABUND presents insulated copper line sets and related HVAC installation products at industry exhibitions for international customers and professional buyers.
Frequently Asked Questions
What size is this insulated copper line set?
This product uses 1/4" and 3/8" copper tubing, equivalent to approximately 6.35 mm and 9.52 mm outside diameter.
How long is this copper line set?
This product is supplied in a 35 ft length, approximately 10.67 m.
What insulation is used on the 35 ft line set?
The current product information identifies this configuration with 1/2" Black Rubber insulation.
What copper standards are listed?
The current product information identifies ASTM B280 and C12200 DHP references for the copper tubing.
Are the copper tube ends flared?
Yes. The current product information states that both copper tube ends are flared and supplied with nuts.
What is the listed temperature range for the Black Rubber insulation?
The current product information lists a Black Rubber insulation temperature range of -40°C to 120°C.
What system capacity commonly uses 1/4" x 3/8" tubing?
The current DABUND product information associates 1/4" x 3/8" tubing with some approximately 0.75–1 ton or 9,000–12,000 BTU split air-conditioning systems. This is only a general reference.
Can I use this line set with every 9,000 or 12,000 BTU mini split?
No. Different equipment models can use different refrigerant line sizes even when their nominal capacities are similar. Always confirm the required liquid and suction line sizes in the equipment installation manual.
Is 35 ft suitable for every mini split installation?
No. Confirm both the minimum and maximum permitted refrigerant-line lengths for the specific HVAC system.
Does a 35 ft installation require additional refrigerant?
It depends on the HVAC system. Check the factory refrigerant charge, included piping-length allowance and additional refrigerant requirements specified by the equipment manufacturer.
Does vertical separation matter?
Yes. The permitted vertical separation between indoor and outdoor units is equipment-specific and should be checked in the manufacturer's installation documentation.
Can this line set be used with a heat pump?
It can be considered for compatible heat-pump equipment that specifically requires 1/4" x 3/8" refrigerant tubing and permits the selected line length.
What accessories are included?
The current product information references communication wire cable, a 3 m drain hose, wall pipe, wall cover and other installation parts. Confirm the exact package contents for this 35 ft 1/4" x 3/8" SKU before ordering.
Are other copper tube sizes available?
Yes. The current product range includes 1/4" x 3/8", 1/4" x 1/2", 1/4" x 5/8", 3/8" x 5/8", 3/8" x 3/4", 1/2" x 3/4" and 3/8" x 7/8" combinations.
Are other insulation thicknesses available?
Yes. Multiple Black Rubber insulation thickness options are listed across the wider product range. Confirm the required insulation configuration for the exact order.
Can DABUND provide OEM or ODM insulated copper line sets?
Yes. OEM and ODM requirements can be discussed according to tubing size, insulation configuration, packaging and commercial order requirements.
Can I request a sample?
Sample requests are available according to the current sales policy. 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?
Available international trade terms can include EXW, FOB, CFR and CIF.
What is the typical delivery time?
The current product information lists a typical delivery period of approximately 15–20 days. Actual lead time depends on order quantity, product configuration, customization and production schedule.
