50 ft 3/8" x 7/8" HVAC Line Set

50 Ft 3/8" x 7/8" HVAC Line Set

DABUND 50 ft 3/8" x 7/8" HVAC Line Set is a pre-insulated twin copper refrigerant piping solution for compatible air conditioners, heat pumps, mini split systems and selected refrigeration applications.

The paired copper tubing includes a 3/8" tube and a 7/8" tube, equivalent to approximately 9.52 mm and 22.22 mm outside diameter. The continuous coil length is 50 ft, approximately 15.24 m.

On compatible HVAC equipment, the 3/8" tube commonly functions as the liquid line while the 7/8" tube functions as the suction or gas line. Exact refrigerant piping dimensions should always be verified against the installation specifications for the specific equipment model.

High-purity copper tubing is combined with factory-applied black rubber insulation to provide thermal protection and condensation control. ASTM B280 and C12200 DHP copper specifications are available according to the ordered configuration.

Quick Answer: This product is a 50 ft / 15.24 m pre-insulated HVAC line set containing 3/8" and 7/8" copper tubing, approximately 9.52 mm and 22.22 mm OD, with black rubber insulation for compatible HVAC systems.

Compatibility Notice: Do not select an HVAC line set only by BTU capacity, tonnage or equipment brand. Confirm the required liquid-line size, suction-line size, maximum piping length, vertical separation, refrigerant type and refrigerant charging requirements for the exact equipment model.

50 Ft 3/8" x 7/8" HVAC Line Set Specifications

Key Features of the 3/8" x 7/8" HVAC Line Set

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

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

Their approximate outside diameters are 9.52 mm and 22.22 mm. Refrigerant line sizes vary between manufacturers and equipment models, so both dimensions should be confirmed before ordering.

50 Ft Continuous Copper Refrigerant Line

The 50 ft / 15.24 m continuous coil provides additional routing flexibility for installations where indoor and outdoor HVAC equipment are separated by walls, ceilings, floors or longer horizontal distances.

Where permitted by the equipment manufacturer, a continuous line set can reduce intermediate refrigerant piping joints compared with connecting several shorter copper sections.

C12200 DHP Copper Tubing

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

ASTM B280 and C12200 DHP specifications are available according to the ordered configuration. Buyers requiring a specific wall thickness or pressure rating should confirm the applicable technical data before production.

Factory-Applied Black Rubber Insulation

Factory-applied black rubber insulation helps reduce field preparation while providing thermal insulation and helping control condensation around the copper refrigerant tubing.

Multiple Insulation Thickness Options

Available insulation thicknesses include 8 mm, 9 mm, 10 mm, 13 mm, 19 mm and 25.4 mm according to project requirements and the selected product configuration.

OEM Printing and Private Label Supply

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

High-Purity Copper

Black Rubber Insulation

Protective Plastic Caps

Black Rubber Insulation for HVAC Line Sets

Closed-cell black rubber insulation helps reduce heat transfer and moisture penetration while supporting condensation control around refrigerant copper tubing.

• Closed-cell structure for moisture resistance

• Thermal protection for HVAC refrigerant piping

• Helps reduce surface condensation

• Flexible construction for routing through building spaces

• UV-resistant configurations available

• Multiple insulation thickness options

• Selected configurations with temperature ranges from approximately -40°C to 120°C

Thermal Protection

The high-density closed-cell structure helps reduce heat transfer between the refrigerant tubing and surrounding air.

Condensation Control

Black rubber insulation helps limit water-vapor penetration and surface condensation. Insulation joints and repaired sections should be properly sealed during installation.

Flexible Installation

Flexible insulation helps contractors route copper tubing through walls, ceilings, attics, service spaces and mechanical areas while protecting the pipe during normal installation handling.

UV-Resistant Options

UV-resistant insulation configurations are available for outdoor refrigerant-line sections. Additional protective covers may be used where greater weather or mechanical 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 applicable documentation for the exact insulation being ordered.

Why Choose a 50 Ft HVAC Line Set?

A 50 ft HVAC line set provides additional routing distance where shorter refrigerant piping is insufficient but an extended 75 ft or 100 ft coil is unnecessary.

The 15.24 m coil can be useful when the outdoor condenser or heat pump is located farther from the indoor unit because of building layout, equipment access or installation requirements.

Where permitted by the HVAC equipment manufacturer, one continuous 50 ft copper line set can reduce intermediate refrigerant piping connections compared with joining multiple shorter sections.

Installation Considerations for a 50 Ft HVAC Line Set

Verify the Required 3/8" x 7/8" Pipe Sizes

Confirm that the exact indoor and outdoor HVAC equipment requires 3/8" and 7/8" outside-diameter refrigerant tubing. Equipment with similar nominal capacity can use different refrigerant line sizes.

Check Maximum Actual Piping Length

Confirm that the equipment manufacturer permits approximately 50 ft / 15.24 m of actual refrigerant piping. Maximum allowable length varies by system and model.

Check Equivalent Piping Length

Elbows, bends and routing conditions may increase equivalent line length. Follow the equipment manufacturer's calculation method where equivalent-length limits are specified.

Confirm Vertical Separation

Where indoor and outdoor units are installed at different elevations, verify the manufacturer's maximum allowable vertical separation.

Check Additional Refrigerant Requirements

Some HVAC systems include a factory refrigerant charge for only a specified standard piping length. A 50 ft installation may require additional refrigerant according to the manufacturer's charging instructions.

Support Long Horizontal and Vertical Runs

Refrigerant piping should be properly supported to reduce sagging, vibration and mechanical stress on the copper tubing and insulation.

Protect Insulation at Wall Penetrations

Use suitable sleeves, grommets or other protection where insulated copper tubing passes through structural openings to reduce abrasion and insulation damage.

Is 3/8" x 7/8" Compatible With My HVAC System?

The 3/8" x 7/8" refrigerant piping combination is used by selected higher-capacity mini split, heat pump and split-system air conditioners.

Some systems in approximately 72,000–96,000 BTU classes may use these dimensions, but this is not a universal sizing rule. Equipment with similar capacity can require different refrigerant pipe sizes.

Always verify the required liquid-line and suction-line dimensions in the technical documentation for the exact equipment model before purchasing the line set.

Applications of the 50 Ft 3/8" x 7/8" HVAC Line Set

Split Air Conditioning Systems

Suitable for compatible split air-conditioning equipment that specifically requires 3/8" and 7/8" refrigerant piping.

Heat Pump Systems

Can be supplied for compatible heat pump installations using these paired refrigerant tube dimensions.

Higher-Capacity Mini Split Systems

Suitable for selected higher-capacity ductless or split HVAC equipment where the specified refrigerant pipe dimensions match this line set.

Commercial HVAC Projects

The 50 ft length provides additional routing flexibility for compatible commercial HVAC projects where indoor and outdoor equipment are positioned farther apart.

Selected Refrigeration Applications

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

Available HVAC Line Set Sizes

50 Ft HVAC Line Set for Distributors and Contractors

DABUND supplies pre-insulated HVAC line sets to distributors, wholesalers, importers, HVAC contractors, engineering 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 HVAC installations.

OEM and Custom HVAC Line Set Supply

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

• Custom copper tube combinations

• Custom coil lengths

• Multiple black rubber insulation thicknesses

• Company name and specification printing

• Private-label packaging

• Custom product identification

• Bulk supply for distributors and project buyers

Why Choose DABUND HVAC Line Sets?

HVAC Manufacturing Experience Since 2008

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

Multiple Sizes and Lengths

Multiple copper tube combinations, coil lengths and insulation thicknesses allow distributors to source different HVAC refrigerant piping configurations according to market and project requirements.

OEM and Private-Label Support

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

DABUND Factory and Export Packaging

DABUND manufactures insulated copper pipe, mini split line sets 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. Buyers should confirm the applicable documentation for the exact insulation configuration being ordered.

International HVAC Exhibitions

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

Frequently Asked Questions

What is a 50 ft 3/8" x 7/8" HVAC line set?

It is a paired refrigerant piping system containing 3/8" and 7/8" outside-diameter 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 7/8" copper tubing?

The product information lists approximately 9.52 mm outside diameter for the 3/8" tube and approximately 22.22 mm for the 7/8" tube.

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

On compatible equipment, the 3/8" tube commonly functions as the liquid line and the 7/8" tube as the suction or gas line. Always confirm the exact piping specification for the equipment being installed.

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

Some higher-capacity systems in approximately 72,000–96,000 BTU classes may use these dimensions, but this is not universal. Similar-capacity systems can require different refrigerant line sizes.

Can I select the HVAC line set by BTU or tonnage alone?

No. Refrigerant pipe sizing depends on the equipment design, refrigerant type, total piping length, vertical separation and manufacturer specifications.

Why choose a 50 ft HVAC line set?

A 50 ft line set provides additional routing distance where shorter piping is insufficient and can reduce intermediate refrigerant-line joints when the equipment permits a continuous 50 ft run.

Can every HVAC system use a 50 ft refrigerant line?

No. Maximum actual and equivalent piping lengths vary by manufacturer and model. Confirm that the exact equipment permits approximately 50 ft / 15.24 m of refrigerant piping.

Does a 50 ft refrigerant line require additional refrigerant?

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

What insulation is used on this HVAC line set?

This product configuration uses black rubber closed-cell insulation designed to provide thermal protection and help control condensation around the refrigerant piping.

What insulation thicknesses are available?

Available insulation thickness options include 8 mm, 9 mm, 10 mm, 13 mm, 19 mm and 25.4 mm depending on the selected product configuration.

Is UV-resistant insulation available?

Yes. UV-resistant insulation configurations are available where portions of the refrigerant line are installed outdoors.

What pressure rating does the copper tubing have?

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

Can DABUND customize the HVAC line set?

Yes. OEM and ODM options include copper tube combinations, coil lengths, insulation thickness, printed identification and private-label packaging.

Can I get samples before placing a bulk order?

Yes. According to the current product information, DABUND can provide three sample pieces for evaluation, with the buyer covering express shipping costs. 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?

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 order quantity, product specification, customization and production schedule.

Who should install an HVAC refrigerant line set?

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