50 ft 3/8" x 7/8" Pre Insulated Copper Tube

50 Ft 3/8" x 7/8" Pre-Insulated Copper Tube

DABUND 50 ft 3/8" x 7/8" pre-insulated copper tube is designed for compatible air-conditioning, heat pump, commercial HVAC and refrigeration systems that require these exact refrigerant piping dimensions.

The paired copper tubing combines a 3/8" tube and a 7/8" tube, equivalent to approximately 9.52 mm and 22.23 mm outside diameter. The continuous coil length is 50 ft, approximately 15.24 m.

On compatible HVAC equipment, the 3/8" tube commonly serves as the liquid line while the 7/8" tube serves as the suction or gas line. Final pipe sizing must always follow the exact equipment manufacturer's installation requirements.

This configuration uses high-purity copper tubing with factory-applied white PE insulation. ASTM B280 and C12200 copper specifications are available according to the ordered configuration, with multiple insulation thickness and OEM printing options for distributors and project buyers.

Quick Answer: This product is a 50 ft / 15.24 m pre-insulated HVAC copper line set with 3/8" and 7/8" outside-diameter tubing, approximately 9.52 mm and 22.23 mm, supplied with white PE insulation for compatible HVACR applications.

Compatibility Notice: Do not select this line set only by tonnage, BTU rating or brand. Verify the required liquid-line size, suction-line size, maximum actual and equivalent piping length, vertical separation, refrigerant type and insulation requirements for the exact HVAC model.

50 Ft 3/8" x 7/8" Copper Tube Specifications

Key Features of the 3/8" x 7/8" Insulated Copper Tube

3/8" Liquid Line and 7/8" Suction Line

On compatible HVAC systems, the smaller 3/8" copper tube commonly serves as the liquid line while the larger 7/8" copper tube serves as the suction or gas line.

Their approximate outside diameters are 9.52 mm and 22.23 mm. Because refrigerant piping requirements vary between equipment models, always confirm both dimensions before installation.

50 Ft Continuous Copper Refrigerant Piping

The 50 ft / 15.24 m continuous coil provides additional routing distance for projects where indoor and outdoor HVAC equipment cannot be connected with a short line set.

Where permitted by the equipment manufacturer, continuous copper tubing can reduce the number of intermediate connections compared with joining multiple shorter pipe sections.

High-Purity C12200 Copper

High-purity copper provides good formability, thermal conductivity and corrosion resistance for professional HVAC and refrigeration piping applications.

ASTM B280 and C12200 specifications are available according to the ordered configuration. Buyers requiring specific tube wall thickness, pressure performance or technical documentation should confirm these requirements before production.

Factory-Applied White PE Insulation

The copper tubing is supplied with factory-applied white PE insulation to help reduce field preparation, thermal transfer and surface condensation.

Multiple Insulation Thickness Options

Available insulation thickness options include 8 mm, 9 mm, 10 mm, 13 mm, 19 mm and 25.4 mm according to project requirements and ordered configuration.

OEM Printing for HVAC Distributors

Company name, copper tube size, coil length and other product identification can be printed on the insulation for distributors, wholesalers and private-label HVAC brands.

High-Purity Copper Tubing

White PE Insulation

Protective Plastic Caps

White PE Multi-Layer Insulation Structure

The white PE insulation system uses a multilayer structure designed to help protect the refrigerant tubing from heat transfer, moisture and mechanical wear during HVAC installation and operation.

Protective PE Outer Layer

The embossed PE outer layer helps protect the insulation from abrasion and handling damage. UV-resistant configurations are available for installations that include outdoor refrigerant piping.

IXPE Foam Middle Layer

The foam layer helps reduce heat transfer while providing cushioning and moisture resistance around the copper refrigerant tube.

Closed-Cell Inner Structure

The closed-cell inner layer helps limit water-vapor penetration and supports condensation control around cold refrigerant piping.

Insulation Pipe Production

Insulated Pipe Warehouse

Closed-Cell Inner Insulation

Benefits of White PE Insulation

Thermal Protection

Suitable insulation helps reduce unwanted heat transfer between refrigerant tubing and ambient air, supporting stable HVAC operating conditions.

Condensation Control

Closed-cell insulation helps limit water-vapor penetration and surface condensation. Properly sealing all insulation joints is particularly important in warm and humid environments.

Mechanical Protection

The outer layer helps protect the insulation during transport, routing and installation while maintaining flexibility around bends and structural obstacles.

UV-Resistant Options

UV-resistant insulation configurations are available for outdoor refrigerant-line sections. Additional line-set covers may be used where greater mechanical or weather protection is required.

Insulation Testing Options

Available insulation specifications include testing related to ASTM E84, UL 94, ASTM D1056, ASTM G21, ASTM C1427 and UL 723 according to the selected material configuration. Buyers should confirm the exact applicable report for the ordered product.

Why Choose a 50 Ft 3/8" x 7/8" Line Set?

The 50 ft length is designed for compatible installations where indoor and outdoor HVAC equipment require a longer refrigerant piping route than common short line sets.

Typical routing may pass through walls, ceilings, attics, mechanical spaces or around structural obstacles before reaching the outdoor condenser or heat pump.

A continuous 50 ft coil may also reduce intermediate connections compared with joining several shorter copper sections, provided the system manufacturer permits the required line length.

Installation Considerations for a 50 Ft Refrigerant Run

Confirm the Required Pipe Diameters

Verify that the exact equipment model requires approximately 9.52 mm and 22.23 mm outside-diameter refrigerant tubing. Similar-capacity HVAC systems can use different pipe dimensions.

Check Maximum Actual and Equivalent Line Length

Confirm that the HVAC equipment permits the required 50 ft / 15.24 m refrigerant route. Bends and routing conditions may also affect the system's calculated equivalent piping length.

Confirm Maximum Vertical Separation

For installations where indoor and outdoor units are located at different elevations, verify the manufacturer's permitted vertical separation.

Check Additional Refrigerant Requirements

Many HVAC systems include a factory refrigerant charge for a specified standard piping length. A longer installation may require additional refrigerant according to the manufacturer's charging rate and procedure.

Support Long Refrigerant Runs

Horizontal and vertical refrigerant piping should be properly supported to reduce sagging, vibration and mechanical stress on both the copper tube and insulation.

Protect Insulation at Wall Penetrations

Use suitable sleeves or protective materials where insulated copper tubing passes through walls, floors or other structural openings to reduce abrasion and insulation damage.

Is a 3/8" x 7/8" Copper Line Set Compatible With My HVAC System?

A 3/8" x 7/8" refrigerant line set is used by selected higher-capacity air-conditioning, heat pump and refrigeration systems. However, there is no universal tonnage or BTU rule that applies to every HVAC manufacturer.

Some higher-capacity equipment may specify a 3/8" liquid line and 7/8" suction line, while another unit with similar nominal capacity may require different tubing sizes.

Always verify refrigerant line dimensions against the installation manual or technical data for the exact indoor and outdoor equipment combination.

Applications of 50 Ft 3/8" x 7/8" Copper Tubing

High-Capacity Split Air Conditioning

Suitable for compatible split-system air conditioners that specifically require 3/8" and 7/8" refrigerant pipe dimensions.

Heat Pump Systems

Can be used with compatible heat pumps requiring this paired refrigerant line size and appropriate insulation.

Commercial HVAC Applications

The 50 ft length provides additional routing flexibility for compatible commercial installations where equipment is separated by walls, floors or mechanical spaces.

Refrigeration Systems

The tubing can also be supplied for refrigeration applications where copper size, wall thickness, insulation and operating requirements match the system design.

Available Pre-Insulated Copper Tube Sizes

50 Ft Copper Line Set for HVAC Distributors

DABUND supplies pre-insulated copper tubing for HVAC wholesalers, distributors, importers, contractors, project companies and private-label brands.

The 50 ft 3/8" x 7/8" configuration provides a stocking option for buyers serving compatible higher-capacity air-conditioning, heat pump and refrigeration equipment.

OEM and Custom Pre-Insulated Copper Tube Supply

DABUND supports OEM and ODM supply for HVAC distributors, importers and private-label brands.

• Custom copper tube combinations

• Custom coil lengths

• Multiple white PE insulation thicknesses

• Logo and specification printing on insulation

• Private-label packaging

• Custom product identification

• Bulk production for distributors and project buyers

Why Choose DABUND Pre-Insulated Copper Tubing?

HVAC Manufacturing Experience Since 2008

DABUND has manufactured HVAC components since 2008, supplying insulated copper pipe, mini split line sets and related HVAC products to international buyers.

Multiple Sizes and Lengths

Multiple copper tube combinations, coil lengths and insulation thicknesses allow distributors to source different HVAC line-set configurations according to their markets.

OEM and Private-Label Support

Insulation printing, product identification and packaging can be customized for HVAC brands, distributors and wholesale customers.

DABUND Factory

DABUND manufactures insulated copper pipe, mini split line sets, aluminum pipe 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. Confirm the exact applicable test documentation for the ordered insulation.

International HVAC Exhibitions

DABUND participates in international HVAC exhibitions to present insulated copper tubing, line sets and HVAC products to distributors, importers and professional buyers.

Frequently Asked Questions

What is a 50 ft 3/8" x 7/8" pre-insulated copper tube?

It is a paired HVAC refrigerant line set containing 3/8" and 7/8" outside-diameter copper tubing with factory-applied insulation. The coil length is approximately 50 ft or 15.24 m.

What are the metric dimensions of 3/8" and 7/8" copper tubing?

A 3/8" tube has an outside diameter of approximately 9.52 mm, while a 7/8" tube has an outside diameter of approximately 22.23 mm.

Which tube is the liquid line and which is the suction line?

On compatible HVAC equipment, the 3/8" tube commonly serves as the liquid line and the 7/8" tube as the suction or gas line. Always verify this in the equipment manufacturer's installation documentation.

What HVAC capacity uses a 3/8" x 7/8" line set?

This pipe combination is used by selected higher-capacity HVAC systems. Some systems in approximately 72,000–96,000 BTU classes may use these dimensions, but there is no universal capacity-to-pipe-size rule.

Can I choose this copper line set by tonnage alone?

No. Correct refrigerant piping depends on equipment design, refrigerant type, piping distance, elevation difference and manufacturer requirements.

Why choose a 50 ft line set?

A 50 ft coil provides more routing distance for installations where shorter refrigerant tubing is insufficient. It can also reduce intermediate pipe connections when the equipment manufacturer permits a continuous 50 ft run.

Can every HVAC system use a 50 ft refrigerant line?

No. Maximum actual and equivalent refrigerant line lengths vary by equipment model. Check the manufacturer documentation before ordering or installation.

Does a 50 ft refrigerant line require additional refrigerant?

It may. Many HVAC systems include a factory refrigerant charge for only a specified standard piping length. Follow the manufacturer's charging instructions for the exact model.

What insulation does this product use?

This product configuration uses white PE insulation with a closed-cell structure designed for thermal insulation and condensation control.

What insulation thicknesses are available?

Available insulation thicknesses include 8 mm, 9 mm, 10 mm, 13 mm, 19 mm and 25.4 mm depending on the selected product specification.

Is UV-resistant insulation available?

Yes. UV-resistant insulation configurations are available for refrigerant piping that includes outdoor sections.

What pressure rating does the copper tubing have?

Allowable working and test pressure depends on the tube diameter, wall thickness, copper specification and ordered configuration. Buyers requiring a specific pressure rating should confirm the applicable technical data before ordering.

Can DABUND customize the 50 ft line set?

Yes. OEM and ODM options include tube combinations, coil length, insulation thickness, insulation printing, product identification and private-label packaging.

Can I get samples before a bulk order?

Yes. DABUND provides sample support for product evaluation. Sample specifications and express shipping arrangements should be confirmed before dispatch.

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 quantity, specification, customization and production schedule.

Who should install the refrigerant copper tubing?

Refrigerant piping, brazing or flare connections, pressure testing, evacuation and refrigerant charging should be completed by qualified HVAC personnel according to local requirements and the equipment manufacturer's instructions.