100 ft 3/8" x 5/8" Mini Split Long Line Set Installation

100 Ft 3/8" x 5/8" Mini Split Long Line Set

The DABUND 100 ft 3/8" x 5/8" mini split long line set provides a continuous, pre-insulated copper refrigerant connection for compatible ductless air conditioners, heat pumps, VRF/VRV branches and HVACR systems. The paired coil includes a 3/8-inch liquid line and a 5/8-inch suction line, each approximately 100 feet or 30.48 meters long.

The seamless copper tubing is manufactured from C12200 phosphorus-deoxidized copper and is designed to meet ASTM B280 requirements for air-conditioning and refrigeration field service. White multilayer PE insulation helps reduce heat transfer, control condensation and protect the copper tubing during transport and long-distance routing.

Long-line compatibility notice: A 100-foot refrigerant route is not permitted by every mini split or heat-pump system. Before ordering, confirm the required tube diameters, copper wall thickness, maximum total piping length, maximum vertical separation, permitted number of bends, additional refrigerant charge and any long-line accessories in the equipment manufacturer’s installation manual.

100 Ft 3/8 x 5/8 Line Set Specifications

Key Features of the 100 Ft Mini Split Long Line Set

Continuous 100-foot copper coils: The long, unbroken tubing can reduce the need for intermediate joints on extended refrigerant routes, subject to the connected system’s maximum piping limits.

ASTM B280 copper tubing: C12200 DHP copper is intended for air-conditioning and refrigeration field service and provides the formability required for professional routing, bending, cutting, flaring and brazing.

Pre-insulated paired construction: Both the 3/8-inch and 5/8-inch copper tubes are insulated to help control condensation, reduce thermal gain and simplify long-distance installation.

White multilayer PE insulation: The embossed outer film, cross-linked foam layer and closed-cell inner layer are designed to provide thermal performance, moisture resistance and installation protection.

Protected tube ends: Plastic caps help prevent dust, moisture and debris from entering the tubing before field preparation and connection.

OEM supply flexibility: DABUND can customize copper wall thickness, tube combinations, insulation thickness, markings, cartons and private-label packaging for distributors and HVAC brands.

Copper Tubing and White PE Insulation Construction

The line set contains two seamless copper tubes supplied together as one long coil. When specified by the connected equipment, the 3/8-inch tube functions as the liquid line and the 5/8-inch tube functions as the suction or gas line. The final piping arrangement must follow the equipment manufacturer’s installation instructions.

The copper ends are protected for transport and generally require field cutting, flaring or brazing according to the selected system and ordered configuration. Nitrogen purging during brazing, correct flare preparation and proper torque are important for refrigerant-system cleanliness and leak prevention.

C12200 Copper Tubing

White PE Insulation

Protected Tube Ends

Three-Layer White PE Insulation

The white insulation combines an embossed protective outer film, a cross-linked polyethylene foam middle layer and a closed-cell inner layer. This construction is designed to help reduce heat transfer, limit moisture penetration, absorb minor installation impact and provide a clean external finish.

Insulation Production

Insulated Pipe Inventory

Closed-Cell Inner Layer

Embossed Protective Outer Layer

The embossed PE film helps improve abrasion resistance and handling durability. Outdoor exposure requirements should be confirmed for the exact insulation grade ordered, including whether additional line-hide, wrapping or jacketing is necessary.

Cross-Linked PE Foam Middle Layer

The dense foam layer is designed to reduce thermal transfer, limit water penetration and absorb minor impact during installation.

Closed-Cell Inner Layer

The inner layer fits around the copper tubing and supports thermal and condensation control. All joints, cut ends and transitions should be sealed to preserve the vapor barrier.

Long-Line Installation Requirements

Maximum piping length: Confirm that the selected equipment permits a 100-foot total route. Some systems allow 100 feet or more, while others have shorter maximum limits.

Additional refrigerant charge: Many systems are factory charged for only part of the allowable piping length. Refrigerant may need to be added according to a model-specific weight-per-foot or weight-per-meter formula.

Vertical separation: The maximum permitted height difference between indoor and outdoor units may be lower than the maximum total piping length. Follow the equipment manual for elevation limits and oil-management requirements.

Bends and routing: Long runs should use smooth-radius bends and avoid kinks, flattened tubing and unnecessary fittings. Observe the manufacturer’s maximum number of bends where specified.

System performance: Extended piping can affect refrigerant pressure drop, capacity and efficiency. Equipment selection and line sizing should be reviewed by a qualified HVAC professional.

Commissioning: Installation should include nitrogen pressure testing, leak testing, evacuation to the equipment manufacturer’s requirement, correct refrigerant adjustment and documented commissioning.

Available Mini Split Line Set Sizes

DABUND supplies multiple paired copper tube combinations, coil lengths and white PE insulation thicknesses for HVAC wholesalers, importers, project suppliers and private-label brands. The correct size must be selected from the connected equipment documentation rather than by capacity alone.

OEM Long Line Set Manufacturer

DABUND has manufactured insulated copper pipe, mini split line sets and HVAC installation products since 2008. Wholesale buyers can specify copper tube dimensions, wall thickness, insulation construction, coil length, printed identification, carton artwork and private-label packaging.

For an accurate long-line quotation, provide the liquid-line and suction-line outside diameters, copper wall thickness, total length, insulation material and thickness, refrigerant, maximum working pressure, equipment application, required certificates, order quantity, packaging design and destination port.

Why Choose DABUND?

HVAC manufacturing experience: DABUND has produced HVAC parts since 2008 and supplies insulated copper tubing for international distributors and project markets.

Long-length production capability: Continuous insulated coils are available for projects that require extended routing and fewer intermediate joints.

In-house insulation options: Multiple insulation materials, thicknesses and printed marking configurations can be developed for different markets and project specifications.

OEM and sample support: Qualified buyers can request customized samples, branded tubing and private-label packaging before bulk production.

Quality Documents and Test Reports

The applicable certificate or test report depends on the exact copper tube and insulation configuration ordered. Buyers should request current documentation matching the selected copper wall thickness, insulation material, flame-performance grade and destination-market requirement.

Available documentation may reference ASTM B280 for copper tubing and ASTM E84, UL 94, ASTM D1056 or ASTM G21 for applicable insulation configurations. Final compliance must be confirmed against the specification stated in the quotation and purchase order.

Meet DABUND at HVAC Exhibitions

DABUND participates in international HVAC exhibitions where distributors, equipment brands and project buyers can inspect mini split long line sets, insulated copper tubing and related air-conditioning installation products.

Frequently Asked Questions

What does 3/8 x 5/8 x 100 ft mean?

It means the paired line set contains one 3/8-inch outside-diameter copper tube and one 5/8-inch outside-diameter copper tube, each approximately 100 feet long. The metric outside diameters are about 9.52 mm and 15.88 mm, and the length is approximately 30.48 meters.

Can every mini split use a 100 ft line set?

No. The equipment must specifically permit the 3/8-inch and 5/8-inch tube sizes and a 100-foot route. Check the maximum piping length, vertical separation and bend limits in the installation manual.

Does a 100 ft refrigerant line require additional refrigerant?

Often, yes. Many systems include a factory charge for only a specified piping length. Additional refrigerant must be calculated using the model-specific rate provided by the equipment manufacturer.

Can a long line set reduce HVAC capacity or efficiency?

Extended piping can increase pressure drop and may affect capacity or efficiency. The equipment manufacturer’s long-line data, tube-size requirements and refrigerant-charge instructions should be reviewed by a qualified HVAC professional.

Why is ASTM B280 important for this copper tubing?

ASTM B280 specifies requirements for seamless copper tube intended for air-conditioning and refrigeration field service. It provides a recognized basis for defining ACR copper tube material and dimensional quality.

What is the purpose of the white PE insulation?

The insulation helps reduce heat transfer, control condensation and protect the copper during transport and installation. Correct sealing of joints and exposed ends is necessary to maintain the vapor barrier.

Is the white insulation suitable for outdoor installation?

Outdoor suitability depends on the selected insulation grade, UV exposure, climate and local code. Confirm whether additional line-hide, tape, coating or external jacketing is required.

Is this line set compatible with R410A or R32?

Compatibility depends on copper wall thickness, pressure rating, tube dimensions, fittings, cleanliness and equipment requirements. State the refrigerant and required working pressure when requesting a quotation.

Are the ends pre-flared?

The standard configuration shown uses protected tube ends. Field flaring or brazing may be required. Pre-flared ends and flare nuts can be discussed as a customized option where technically suitable.

Can DABUND customize copper wall thickness and insulation thickness?

Yes. Copper wall thickness and insulation thickness can be configured according to tube diameter, refrigerant pressure, condensation risk, climate, project code and buyer specification.

Can I order OEM printing and private-label packaging?

Yes. DABUND supports OEM and ODM requirements including company names, tube sizes, length markings, labels, carton artwork, manuals and private-brand packaging.

Can I request a sample before placing a bulk order?

Yes. Qualified buyers can request free samples, with express freight normally paid by the buyer. Specify the tube sizes, wall thickness and insulation configuration required for evaluation.

What information is required for a quotation?

Provide the two tube outside diameters, copper wall thickness, total length, insulation material and thickness, refrigerant, working pressure, equipment application, certification requirements, order quantity, packaging design and destination port.

What payment and delivery terms are available?

Common payment options include T/T, L/C at sight and credit card, subject to order approval. Delivery terms can include EXW, FOB, CFR and CIF. Final commercial terms should be confirmed in the quotation.

How long is the production lead time?

A typical production lead time is approximately 15 to 20 days. The final schedule depends on order quantity, copper specification, insulation customization, packaging requirements and current production capacity.