3/8 in. x 5/8 in. x 50 ft. Pre Insulated Copper Tube

50 Ft 3/8" x 5/8" Pre-Insulated Copper Tube

DABUND 50 ft 3/8" x 5/8" pre-insulated copper tube is a paired HVAC refrigerant line set designed for compatible mini split air conditioners, heat pumps, split AC systems and refrigeration applications. The product combines two copper refrigerant tubes with factory-applied insulation to simplify HVAC installation and reduce on-site insulation work.

The paired copper tubing includes one 3/8" tube and one 5/8" tube, equivalent to approximately 9.52 mm and 15.88 mm outside diameter. The total coil length is 50 ft, approximately 15.24 m, providing a practical continuous refrigerant piping solution for medium-distance HVAC installations.

Copper tubing is manufactured from C12200 DHP copper for air-conditioning and refrigeration applications, with ASTM B280 specifications available according to the ordered configuration. Black rubber insulation is available for this product family, with multiple insulation thicknesses and OEM options for HVAC wholesalers, distributors and private-label brands.

Quick Answer: This product is a 50 ft / 15.24 m pre-insulated HVAC copper line set with 3/8" and 5/8" copper tubing, suitable for compatible mini split, heat pump and refrigeration systems that specify these exact refrigerant line dimensions.

Compatibility Notice: Refrigerant line dimensions and allowable piping length vary by HVAC manufacturer and model. Always confirm the required tube sizes, maximum line length, insulation requirements and refrigerant charging instructions in the equipment installation manual before ordering or installation.

50 Ft 3/8" x 5/8" Copper Line Set Specifications

Key Features of the 50 Ft Pre-Insulated Copper Tube

C12200 Copper for HVAC and Refrigeration

DABUND uses C12200 DHP copper tubing for HVAC and refrigeration applications. The copper provides good thermal conductivity, corrosion resistance and formability for professional refrigerant piping installations.

ASTM B280 Copper Tubing Specification

ASTM B280 copper tube specifications are available for air-conditioning and refrigeration applications according to the ordered product configuration. Buyers can confirm dimensional, wall-thickness and testing requirements before placing a bulk order.

3/8" x 5/8" Paired Refrigerant Tubing

The line set combines 3/8" and 5/8" outside-diameter copper tubes. These correspond to approximately 9.52 mm and 15.88 mm. Depending on the HVAC system design, the tubes provide the refrigerant connection between indoor and outdoor equipment.

50 Ft Continuous Copper Line Set

The 50 ft / 15.24 m continuous coil provides greater routing flexibility than short 10 ft or 25 ft line sets. Where permitted by the HVAC equipment manufacturer, a continuous line can reduce the need for additional couplings or intermediate joints.

Factory-Applied Black Rubber Insulation

Factory-applied closed-cell insulation helps reduce heat transfer and condensation while protecting the copper tubing during transportation, installation and operation. Multiple insulation thicknesses are available for different climates and project specifications.

OEM Printing and Private-Label Supply

DABUND can customize insulation printing with company name, copper tube size, coil length and other product information. OEM packaging and private-label options are available for HVAC distributors, wholesalers and brands.

High-Purity Copper Tubing

Black Rubber Insulated Pipe

Protective Plastic Caps

Black Rubber Pipe Insulation Performance

The closed-cell insulation surrounding the copper tubing is designed to reduce thermal transfer, control surface condensation and protect refrigerant piping during HVAC installation and operation.

• Closed-cell construction helps reduce moisture penetration.

• Low thermal conductivity helps reduce heat gain and heat loss.

• Insulation functions as both a thermal layer and moisture-resistant layer.

• UV-resistant insulation options are available for outdoor exposure.

• Multiple insulation thicknesses are available for different project requirements.

• Selected specifications support operating temperatures from approximately -40°C to 120°C.

Thermal Insulation

The high-density closed-cell structure helps reduce heat transfer between the refrigerant tubing and surrounding air, supporting efficient refrigerant transport when the HVAC system is correctly designed and installed.

Condensation and Moisture Control

Proper insulation helps reduce condensation on cold refrigerant lines. This can help protect adjacent walls, ceilings and building materials from unwanted moisture when the line set is correctly installed.

UV and Weather Resistance

UV-resistant insulation options are available for installations where portions of the refrigerant line may be exposed to outdoor conditions. Additional external protection should be used where required by local installation practices or equipment specifications.

Insulation Testing Options

Available insulation specifications include testing related to ASTM E84, UL 94, ASTM D1056 and ASTM G21 according to the original product information. Buyers should confirm the exact material grade and test documentation required for their destination market.

When Should You Choose a 50 Ft HVAC Line Set?

A 50 ft pre-insulated copper line set is useful when the indoor and outdoor HVAC units are separated by a moderate distance and shorter 10 ft, 20 ft or 25 ft line sets do not provide enough routing length.

Typical installations may require refrigerant piping to pass through walls, ceilings, attics, mechanical rooms or around structural obstacles before reaching the outdoor condenser or heat pump unit.

Using one continuous 50 ft coil can reduce the need for intermediate connections compared with combining several shorter copper sections. Fewer joints can also simplify installation and reduce potential connection points when continuous piping is permitted.

However, installers should not automatically use the entire 50 ft coil. Confirm the HVAC manufacturer's minimum and maximum piping length, equivalent length, vertical lift and refrigerant-charge requirements before cutting or installing the tubing.

50 Ft Copper Line Set for HVAC Wholesalers and Distributors

DABUND supplies pre-insulated copper tubing to HVAC wholesalers, refrigeration distributors, importers, contractors, project suppliers and private-label brands. The 50 ft configuration provides a practical inventory option for customers serving residential, commercial and light-commercial HVAC installations.

Buyers can customize copper tube sizes, line lengths, insulation thickness, insulation printing and packaging according to target-market requirements.

OEM services are suitable for HVAC brands that require company names, dimensions, length markings or other identification printed directly on the insulation.

Available Pre-Insulated Copper Tube Sizes

DABUND manufactures multiple paired copper tube combinations, insulation thicknesses and coil lengths for HVAC and refrigeration applications.

Is a 3/8" x 5/8" Line Set Compatible With My HVAC System?

A 3/8" x 5/8" refrigerant line set is used by certain mini split air conditioners, heat pumps and split HVAC systems. However, the correct copper tube dimensions cannot be determined solely by nominal BTU capacity or tonnage.

The 3/8" copper tube has an outside diameter of approximately 9.52 mm, while the 5/8" tube has an outside diameter of approximately 15.88 mm. Verify that these dimensions match the exact indoor and outdoor equipment combination.

Some HVAC equipment may use 3/8" and 5/8" tubing in mid-capacity applications, but different manufacturers can specify different pipe sizes for systems with similar capacities. Always follow the equipment installation manual.

Before installation, also confirm maximum actual line length, equivalent length, vertical separation, insulation thickness, refrigerant type and additional refrigerant-charge requirements.

Refrigerant piping, brazing, pressure testing, evacuation and refrigerant charging should be completed by qualified HVAC personnel in accordance with local regulations and equipment manufacturer instructions.

OEM Pre-Insulated Copper Tube Manufacturer

DABUND has manufactured insulated copper tubing, mini split line sets and HVAC components since 2008. The company supplies products to HVAC wholesalers, distributors, importers, contractors and private-label brands.

Available OEM and ODM options include:

• Customized copper tube dimensions

• Customized coil lengths

• Customized insulation thickness

• Company name and specification printing

• Customized insulation configuration

• Private-label cartons and export packaging

• Bulk supply for distributors and wholesalers

Why Choose DABUND Pre-Insulated Copper Tubing?

• HVAC copper tubing manufacturing experience since 2008

• C12200 DHP copper for air-conditioning and refrigeration applications

• ASTM B280 copper tubing specifications available

• Factory-applied insulation

• Multiple paired copper tube sizes

• Multiple coil lengths and insulation thicknesses

• OEM insulation printing and private-label services

• Bulk production for HVAC wholesalers and distributors

DABUND Factory

DABUND manufactures insulated copper pipes, mini split line sets, aluminum pipes and HVAC components for international B2B customers.

SGS Testing and Insulation Standards

Available insulation specifications include testing related to ASTM E84, UL 94, ASTM D1056 and ASTM G21. Buyers should confirm the exact insulation grade and applicable test documentation required for their destination market.

International HVAC Exhibitions

DABUND participates in international exhibitions to present pre-insulated copper tubing, refrigerant line sets and HVAC components to distributors, contractors, importers and industry buyers.

Frequently Asked Questions

What is a 50 ft 3/8" x 5/8" pre-insulated copper tube?

It is a paired HVAC refrigerant line set containing 3/8" and 5/8" copper tubing with factory-applied insulation. The total coil length is approximately 50 ft or 15.24 m.

What are the metric sizes of 3/8" and 5/8" copper tubing?

A 3/8" copper tube has an outside diameter of approximately 9.52 mm, while a 5/8" copper tube has an outside diameter of approximately 15.88 mm.

How long is a 50 ft copper line set in meters?

50 ft is approximately 15.24 meters.

Why choose a 50 ft line set?

A 50 ft line set provides more routing flexibility than shorter 10 ft, 20 ft or 25 ft coils and can reduce the need for intermediate copper joints when the HVAC manufacturer permits a continuous 50 ft refrigerant run.

Can every mini split use a 50 ft refrigerant line?

No. Maximum and minimum piping length varies by manufacturer and model. Always verify the equipment installation manual before purchasing or installing a 50 ft line set.

What copper material does DABUND use?

DABUND uses C12200 DHP copper for HVAC and refrigeration applications, with ASTM B280 copper tubing specifications available according to the ordered configuration.

What insulation options are available?

Black rubber insulation is available in multiple thicknesses. Other insulation configurations may also be available depending on product specification and customer requirements.

Does the insulation help prevent condensation?

Yes. Closed-cell insulation helps reduce moisture penetration and surface condensation when the correct insulation thickness is selected and properly installed.

Can DABUND print my company name on the insulation?

Yes. OEM printing can include company name, tube size, coil length and other product information according to customer requirements.

Can DABUND customize other copper line set sizes?

Yes. Available paired tube combinations include 1/4" + 3/8", 1/4" + 1/2", 1/4" + 5/8", 3/8" + 5/8", 3/8" + 3/4", 1/2" + 3/4" and 3/8" + 7/8", with multiple lengths available.

Can I get samples before placing a bulk order?

Yes. DABUND provides sample support for product evaluation. You can visit the free sample page for additional 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 order and commercial agreement.

What delivery terms are available?

Available international trade terms can include EXW, FOB, CFR and CIF. Buyers can confirm the preferred Incoterm when requesting a quotation.

What is the typical production lead time?

Standard production lead time is typically around 15–20 days according to the current product information. Actual lead time depends on order quantity, customization requirements, material availability and production schedule.