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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
164 Ft 3/8" x 5/8" Mini Split Long Line Set
The Dabund 164 ft 3/8" x 5/8" mini split long line set is a 50 m continuous pair of insulated refrigeration-grade copper tubing for HVAC contractors, distributors, wholesalers, equipment manufacturers, and project buyers. It combines a 3/8" liquid line and a 5/8" suction line in a long-roll format that can be measured and cut for compatible ductless mini split, heat-pump, VRF, and split-system installations.
The 164 ft coil is primarily supplied as bulk installation material rather than as a universal pre-flared connection kit. Long rolls are normally provided with plain copper ends protected by plastic caps, allowing qualified HVAC technicians to cut, ream, flare, braze, pressure-test, evacuate, and charge the field piping according to the equipment manufacturer’s instructions.
Compatibility notice: A 164 ft roll does not mean every air-conditioning system can operate with a 164 ft refrigerant run. Before installation, verify the permitted pipe diameter, maximum actual and equivalent piping length, vertical separation, number of bends, additional refrigerant charge, insulation thickness, and oil-return requirements for the exact indoor and outdoor units.
164 Ft Long Line Set Specifications
| Product Name | 164 Ft 3/8" x 5/8" Mini Split Long Line Set |
| Nominal Length | 164 ft / 50 m continuous coil |
| Liquid Line Outside Diameter | 3/8" / 9.52 mm |
| Suction Line Outside Diameter | 5/8" / 15.88 mm |
| Copper Material | C12200 DHP copper; ASTM B280 configurations available |
| Copper Purity | 99.9% copper |
| End Configuration | Plain ends with protective plastic caps; field cutting and connection required |
| Standard Insulation | White closed-cell insulation with UV-resistant outer film; black rubber options available |
| Insulation Thickness Options | 8 mm, 9 mm, 10 mm, 13 mm, 19 mm, or 25.4 mm |
| Insulation Temperature Range | Approximately -40°C to 120°C, subject to the selected insulation grade |
| Applications | Compatible mini split, heat-pump, VRF, multi-split, and split HVAC systems that specify 3/8" x 5/8" piping |
| Customization | Copper size, wall thickness, insulation, length, printed marking, cap color, packaging, logo, and private label |
Key Features of the 3/8" x 5/8" Copper Line Set
50 m Continuous Coil for Flexible Field Cutting
The 164 ft continuous roll gives contractors and distributors flexibility when preparing refrigerant piping for projects with different route lengths. The coil can be cut into the lengths permitted by the connected equipment, helping reduce the number of joints and simplify bulk inventory management.
Refrigeration-Grade C12200 Copper
The line set can be manufactured from C12200 deoxidized high-phosphorus copper for air-conditioning and refrigeration service. Copper tube wall thickness and pressure capability should be selected according to tube diameter, refrigerant, working pressure, applicable standard, destination market, and equipment specification.
Plain Ends Protected Against Contamination
Protective plastic caps help prevent dust, moisture, and debris from entering the copper tubing during storage and transport. Keep both ends sealed until the tubing is ready to be measured, cut, prepared, and connected on site.
Closed-Cell Insulation for Condensation Control
The closed-cell insulation reduces heat transfer and helps control condensation on the refrigerant piping. White embossed PE-style insulation and black rubber insulation can be supplied in multiple thicknesses for indoor, outdoor, humid-climate, fire-performance, and project-specific requirements.
OEM Printing and Private-Label Packaging
The insulation surface and packaging can be customized with company name, tube size, metric or imperial length marking, batch information, logo, barcode, instructions, and market-specific labels for HVAC distributors and private-label brands.
99.9% Pure Copper
White Insulated Tubing
Protective Plastic Caps
Three-Layer Insulation Structure
The insulated copper tubing can use an embossed weather-resistant outer film, a dense closed-cell foam layer, and an inner layer fitted around the copper tube. The structure is designed to improve thermal insulation, moisture resistance, abrasion protection, impact absorption, and handling durability.
Insulation Production
Bulk Inventory Supply
Closed-Cell Inner Layer
Outer Protective Film
The embossed outer film helps protect the insulation against abrasion, handling damage, weathering, and aging. UV-resistant options are available when sections of the refrigerant piping will be installed outdoors.
Closed-Cell Foam Core
The dense foam core helps limit heat gain, condensation, water penetration, vibration transfer, and impact during installation. Foam density and thickness can be selected according to the climate and project requirement.
Inner Insulation Layer
The inner layer surrounds the copper tube to maintain insulation continuity. All cut ends, joints, valves, and field connections should be resealed with compatible insulation and vapor-resistant tape after installation.
How to Plan a Long Refrigerant Line Installation
A long line set must be engineered around the connected HVAC equipment. The following checks should be completed before cutting or installing the 164 ft coil.
| Planning Item | What Must Be Confirmed |
|---|---|
| Pipe Diameter | Confirm that the equipment specifies a 3/8" liquid line and 5/8" gas or suction line. Do not select tubing only by BTU rating. |
| Maximum Piping Length | Check both the maximum actual length and maximum equivalent length after allowances for elbows, fittings, and branch components. |
| Vertical Separation | Verify the permitted height difference when the outdoor unit is above or below the indoor unit. |
| Additional Refrigerant | Determine the factory pre-charge allowance and the exact additional charge per foot or meter beyond that allowance. |
| Oil Return and Risers | Follow the equipment manufacturer’s requirements for risers, traps, pipe slope, velocity, and oil return. Do not add traps unless specified. |
| Number of Bends | Keep routing direct and remain within the manufacturer’s limit for bends and minimum bend radius. |
| Copper Wall Thickness | Match tube wall thickness and pressure rating to the refrigerant, system design pressure, standard, and local code. |
| Insulation | Choose sufficient thickness and vapor resistance for the suction-line temperature, ambient humidity, indoor or outdoor location, and fire requirement. |
Do Not Leave Unnecessary Tubing Coiled in the System
Measure the approved route and cut the tubing to the required length. Do not connect the full 164 ft roll and leave excess tubing tightly coiled unless the equipment manufacturer explicitly permits that arrangement. Unnecessary length increases pressure drop, refrigerant volume, equivalent length, installation complexity, and the risk of oil-return or charging problems.
Use Correct Field Connection Procedures
Long rolls are supplied for professional field preparation. Keep the tube interior clean and dry, cut the tubing square, remove burrs without allowing debris to enter, use the required flare or brazed joint, purge with nitrogen when brazing, pressure-test with dry nitrogen, check for leaks, evacuate with a vacuum pump, verify vacuum stability, and weigh in any required additional refrigerant.
164 Ft Copper Line Set Product Overview
The long-roll format is suitable for project stock, contractor workshops, HVAC distribution warehouses, multi-zone installations, commercial retrofits, and OEM equipment packages where the final field length varies. Exact tube wall, coil weight, insulation grade, packaging, and test-document requirements should be confirmed before production.
Available Mini Split Line Set Sizes and Lengths
Dabund supplies multiple liquid-line and suction-line combinations for HVAC and refrigeration projects. Standard long-roll lengths include 15 m, 20 m, 25 m, 30 m, and 50 m, with insulation and packaging options available for different markets.
| Copper Tube Pair | Available Long-Roll Lengths | White Insulation Thickness | Flame-Resistance Options |
|---|---|---|---|
| 1/4" + 3/8" | 15 m / 20 m / 25 m / 30 m / 50 m | 8 / 9 / 10 / 13 / 19 / 25.4 mm | M1 / B1 options |
| 1/4" + 1/2" | 15 m / 20 m / 25 m / 30 m / 50 m | 8 / 9 / 10 / 13 / 19 / 25.4 mm | M1 / B1 options |
| 1/4" + 5/8" | 15 m / 20 m / 25 m / 30 m / 50 m | 8 / 9 / 10 / 13 / 19 / 25.4 mm | M1 / B1 options |
| 3/8" + 5/8" | 15 m / 20 m / 25 m / 30 m / 50 m | 8 / 9 / 10 / 13 / 19 / 25.4 mm | M1 / B1 options |
| 3/8" + 3/4" | 15 m / 20 m / 25 m / 30 m / 50 m | 8 / 9 / 10 / 13 / 19 / 25.4 mm | M1 / B1 options |
| 1/2" + 3/4" | 15 m / 20 m / 25 m / 30 m / 50 m | 8 / 9 / 10 / 13 / 19 / 25.4 mm | M1 / B1 options |
| 3/8" + 7/8" | 15 m / 20 m / 25 m / 30 m / 50 m | 8 / 9 / 10 / 13 / 19 / 25.4 mm | M1 / B1 options |
How to Confirm 3/8" x 5/8" System Compatibility
Pipe size must be selected from the equipment manufacturer’s engineering data or installation manual. Systems with similar nominal cooling capacity can use different liquid and suction pipe diameters, and some systems require reducers, branch joints, or different sizes after a certain equivalent length.
Confirm the liquid and gas service-valve connection sizes.
Confirm the approved refrigerant and required copper wall thickness.
Check maximum one-way, total, and equivalent piping lengths.
Check maximum vertical separation and branch-piping restrictions.
Calculate additional refrigerant using the exact model-specific formula.
Confirm insulation thickness, vapor sealing, and outdoor UV protection.
Do not use a generic tonnage or BTU chart as the final selection method. The exact equipment documentation takes priority over general line-set size guidance.
Quality and Test Documentation
Depending on the selected copper and insulation specification, documentation may be available for ASTM B280, C12200 copper, ASTM E84, UL 94, ASTM D1056, ASTM G21, flame-spread, smoke-development, thermal, and material-performance requirements. Buyers should request the current report that corresponds to the exact material, thickness, color, and production configuration being ordered.
Why Source Long Line Sets from Dabund?
Dabund has manufactured insulated copper pipe, mini split line sets, aluminum pipe, and HVAC installation accessories since 2008. The company supports HVAC distributors, contractors, importers, equipment brands, and project buyers with standard and customized long-roll tubing.
Multiple copper diameters and paired line-set configurations
Long rolls from 15 m to 50 m
White closed-cell and black rubber insulation options
Customized insulation printing, cap color, labels, cartons, and barcodes
OEM and ODM support for wholesalers and private-label brands
Sample evaluation and export-order support
Dabund Factory
Production of insulated copper tubing, mini split line sets, aluminum pipe, and HVAC installation accessories.
Certificate and Test Support
Request certificates and test reports that match the copper tube, insulation grade, wall thickness, and production batch specified in your purchase order.
International HVAC Exhibitions
Dabund meets HVAC distributors, contractors, importers, and project buyers at industry exhibitions and presents insulated copper tubing, line sets, and installation accessories.
Wholesale, OEM, and Project Quotations
For an accurate quotation, provide the liquid and suction tube diameters, copper wall thickness, finished roll length, insulation material and thickness, temperature and fire-performance requirement, printed marking, cap color, packing method, destination market, certification requirement, annual demand, and order quantity.
Dabund can prepare standard export cartons, customized labels, private-label packaging, barcodes, instruction sheets, and project-specific product markings. Sample and bulk production schedules depend on the requested specification, quantity, packaging, raw-material availability, and current production capacity.
Frequently Asked Questions
What is a 164 ft 3/8" x 5/8" mini split line set?
It is a 50 m continuous pair of insulated copper tubes with a 3/8" liquid line and a 5/8" suction line. It is intended as bulk field piping for compatible air-conditioning and heat-pump systems.
Can the full 164 ft coil be connected to one mini split system?
Only when the exact equipment model permits that actual and equivalent piping length, vertical separation, number of bends, pipe diameter, and refrigerant charge. Many systems permit substantially less than 164 ft, while some commercial or VRF systems permit more. Follow the model-specific manual.
Are the ends pre-flared?
Long 50 m rolls are normally supplied with plain ends and protective caps because the installer must cut the tubing to the approved route length. Flare or brazed connections are then prepared according to the equipment manufacturer’s instructions.
Does a long refrigerant line require additional refrigerant?
Frequently, yes. Most equipment includes a factory charge for a defined piping allowance. When the installed length exceeds that allowance, the technician must calculate and weigh in the model-specific additional charge. Never use a generic charge rate.
Is 3/8" x 5/8" suitable for every 36,000 or 48,000 BTU system?
No. Pipe diameter is model-specific and cannot be selected reliably from nominal capacity alone. Check the service-valve sizes and piping table for the exact indoor and outdoor unit combination.
Can the 164 ft line set be cut into shorter lengths?
Yes. The continuous coil can be measured and cut into approved project lengths. After cutting, reseal unused tubing immediately to keep the interior dry and free from contamination.
What insulation options are available?
White closed-cell insulation and black rubber insulation are available in multiple thicknesses. Selection should account for suction temperature, ambient humidity, condensation risk, outdoor exposure, local fire requirements, and project specifications.
Can the insulated copper line set be installed outdoors?
UV-resistant insulation options are available, but exposed tubing should still be protected according to the project specification. A line-set cover or suitable jacket can improve weather resistance, physical protection, and appearance.
Can Dabund print my brand and product information?
Yes. OEM and ODM options can include company name, logo, tube size, length, batch details, barcodes, labels, cartons, instruction sheets, and customized cap colors.
Can I request samples before a wholesale order?
Qualified buyers can request samples to evaluate copper size, wall thickness, insulation, printing, cap design, and packaging. Sample availability and freight terms should be confirmed with the sales team.
What are the typical payment, delivery, and lead-time terms?
Payment methods may include T/T, letter of credit at sight, and other agreed options. Trade terms may include EXW, FOB, CFR, or CIF. A typical production period may be approximately 15 to 20 days, but the confirmed schedule depends on specification, quantity, packaging, material availability, and factory capacity.
