100 ft 3/8" x 7/8" Copper Line Set – Heavy-Duty Insulated HVAC Refrigeration Pipe for Large Systems

100 ft 3/8" x 7/8" Copper Line Set for Large HVAC Systems

The DABUND 100 ft 3/8" x 7/8" copper line set is a heavy-duty insulated HVAC refrigeration pipe designed for large mini split systems, VRF systems, commercial HVAC applications, and long-distance refrigerant line installations. It provides high-pressure refrigerant flow, stable thermal performance, condensation protection, and long-term durability for demanding projects.

This copper line set includes a 3/8" liquid line and a 7/8" suction line with factory-applied insulation. The 100 ft length supports extended routing in large buildings, commercial spaces, and complex HVAC layouts where longer refrigerant piping runs are required.

Product Overview – 100 ft Insulated Copper Line Set for HVAC and Refrigeration Systems

This 100 ft copper line set contains two pre-insulated copper tubes, including one liquid line and one suction line. It is designed to deliver efficient refrigerant transfer over longer distances while reducing field insulation work and improving installation consistency.

Manufactured from 99.9% pure copper with C12200 copper grade support and ASTM B280 compliance according to specification, the line set offers excellent thermal conductivity, corrosion resistance, pressure resistance, and long service life for high-performance HVAC and refrigeration systems.

• Liquid line: 3/8" / 9.52 mm

• Suction line: 7/8" / 22.22 mm

• Length: 100 ft / approximately 30 m

• Material: 99.9% pure copper

• Insulation: black rubber / PE / IXPE foam options

• Application: large mini split, VRF, commercial HVAC, refrigeration systems

Key Features of 3/8" x 7/8" 100 ft Copper Line Set

High-Purity 99.9% Copper for Superior Performance

Premium copper construction supports maximum heat transfer efficiency, reduced energy loss, corrosion resistance, and long-lasting durability. It is suitable for HVAC systems that require stable refrigerant circulation and reliable copper tubing quality.

ASTM B280 and C12200 Copper Tubing Support

The copper tubing can be produced according to ASTM B280 refrigeration copper tubing requirements and C12200 DHP copper grade specifications, helping meet professional HVAC installation and refrigeration piping standards.

High Pressure Rating for Modern Refrigerants

With a pressure rating range of 2100–7000 PSI according to specification, this insulated copper line set can support high-pressure refrigerants such as R410A and R32 when the pipe size, wall thickness, pressure rating, and equipment requirements match.

Large Diameter for High-Capacity HVAC Systems

The 3/8" liquid line and 7/8" suction line configuration is suitable for high-capacity HVAC systems where larger refrigerant flow is required. It is commonly used in large mini split, multi-zone, VRF, and commercial HVAC projects when specified by the equipment manufacturer.

• Suitable for selected 48,000–60,000 BTU HVAC systems according to project requirements

• Also used in some high-capacity ductless systems depending on manufacturer specifications

• Final line size must follow the HVAC equipment installation manual

100 ft Length for Long-Distance Installations

The extended 100 ft length allows flexible routing in larger buildings, helps reduce the need for additional connectors, and supports long-distance refrigerant line runs when the HVAC system allows this installation length.

99.9% Pure Copper

Black Rubber Insulated Pipe

Plastic Cap Protection

Pipe Insulation Tubing Features

The pipe insulation is designed to protect heavy-duty HVAC copper line sets from heat loss, condensation, moisture, UV exposure, and outdoor wear. Black rubber insulation can work as both the insulation layer and moisture-proof layer, helping protect refrigerant lines in long-distance HVAC installations.

• Material option: black rubber insulation

• Temperature range: -40°C to 120°C

• Better moisture condensation protection

• Insulation layer and moisture-proof layer combined in one structure

• No additional vapor permeation protective layer required in many HVAC applications

Advanced Insulation Technology for Maximum Efficiency

UV-Resistant and Flame-Retardant Insulation

The insulation can comply with ASTM E84, UL94, ASTM D1056, and ASTM G21 requirements according to material and specification. It supports a working temperature range from -40°C to 120°C and is suitable for indoor and outdoor HVAC environments.

Multi-Layer Insulation Structure

The multi-layer insulation structure forms a protective thermal shield around the copper pipe, helping maintain refrigerant temperature, reduce energy loss, and protect the line set during long-distance installation.

• Outer layer: UV-resistant PE film for anti-aging and weather resistance

• Middle layer: high-density IXPE foam for thermal protection

• Inner layer: closed-cell insulation for moisture-proof and airtight performance

Condensation and Energy Loss Prevention

The insulation system helps prevent condensation buildup, reduce heat loss, protect copper tubing, lower energy loss, and extend system lifespan. This is especially important for 100 ft copper line set installations.

Applications – Where This Copper Line Set Is Used

Large Mini Split and Multi-Zone Systems

Suitable for high-capacity residential and commercial mini split systems where longer refrigerant piping and larger copper line sizes are required.

VRF and Commercial HVAC Systems

Used in office buildings, hotels, shopping malls, commercial facilities, and multi-zone HVAC projects when system specifications require this pipe size.

Industrial Refrigeration Systems

Suitable for compatible refrigeration applications such as cold storage facilities, food processing plants, and pharmaceutical environments where pipe size and pressure requirements match.

• Large mini split AC systems

• Multi-zone HVAC systems

• VRF and commercial HVAC projects

• Ductless heat pump systems

• Industrial refrigeration systems where specifications match

Technical Specifications

Mini Split Line Set Size Options

Line Set Size and HVAC Capacity Reference

Why Choose This Copper Line Set from DABUND?

HVAC Manufacturing Experience Since 2008

DABUND is a specialized manufacturer with extensive experience in HVAC copper piping solutions, insulated copper pipe, mini split line sets, aluminum pipe, HVAC parts, and global export supply.

In-House Insulation Production

In-house insulation production helps ensure consistent insulation quality, faster production timelines, flexible customization, and stable delivery for bulk HVAC orders.

• Consistent insulation quality

• Faster production timelines

• Customization flexibility

OEM and Custom Branding Available

DABUND supports OEM and ODM services for HVAC distributors, wholesalers, importers, contractors, and private label brands.

• Logo printing on insulation

• Custom packaging

• Private labeling

• Custom insulation thickness

• Custom length and pipe size combinations

Strong Global Supply Capability

DABUND supports regular container shipments, reliable delivery timelines, scalable bulk production, and stable supply for global HVAC buyers.

Installation Tips for Large HVAC Systems

Plan Routing for Long Runs

For 100 ft copper line set installations, plan the routing carefully and minimize unnecessary bends to maintain refrigerant flow efficiency and reduce pressure drop.

Support Long Pipe Runs Properly

Use brackets, clamps, or HVAC line supports to prevent sagging, vibration, insulation compression, and long-term mechanical stress.

Maintain Proper Bend Radius

Avoid kinks and sharp bends that may damage copper tubing, restrict refrigerant flow, or reduce system performance.

Ensure Leak-Free Connections

Proper brazing, sealing, pressure testing, vacuuming, and refrigerant charging are essential for long-term HVAC system reliability.

Confirm Maximum Line Length and Refrigerant Charge

For 100 ft installations, installers must confirm maximum allowable line length, elevation difference, and additional refrigerant charge requirements from the equipment manufacturer’s installation manual.

DABUND Factory

We produce insulated copper pipe, mini split line set, aluminum pipe, and HVAC parts for global HVAC customers.

SGS Certificate

DABUND mini split line set insulation can be made of polypropylene or black rubber with UV resistance and can meet ASTM E84, UL94, ASTM D1056, and ASTM G21 standards according to product specification.

Exhibition

DABUND joins HVAC exhibitions worldwide to help customers evaluate mini split line sets, copper line sets, insulated HVAC refrigeration pipes, and HVAC parts face to face.

FAQ

What is a 100 ft 3/8" x 7/8" copper line set used for?

It is used as a heavy-duty insulated HVAC refrigeration pipe to connect indoor and outdoor units in large mini split systems, VRF systems, commercial HVAC systems, heat pumps, and compatible refrigeration applications.

What system capacity is this line set suitable for?

The 3/8" x 7/8" line set is used for high-capacity HVAC systems. The source page references 48,000–60,000 BTU applications, while line set sizing can vary by equipment design. Always follow the HVAC equipment manufacturer’s installation manual.

Can this 100 ft copper line set handle high-pressure refrigerants?

Yes. It can support refrigerants such as R410A and R32 when the copper tube size, wall thickness, pressure rating, installation length, and system requirements match.

Is this copper line set suitable for outdoor installation?

Yes. The insulation is designed for UV resistance, moisture protection, condensation control, and outdoor durability according to selected product specification.

Does this copper line set come pre-insulated?

Yes. Factory-applied insulation improves efficiency, reduces field installation work, provides consistent insulation quality, and helps prevent condensation.

Why is insulation important for a 100 ft HVAC line set?

Long refrigerant line runs are more exposed to heat gain, heat loss, and condensation risk. Proper insulation helps maintain refrigerant temperature, reduce energy loss, and protect copper tubing.

What standards can this copper line set meet?

The copper tube and insulation can meet ASTM B280, C12200, ASTM E84, UL94, ASTM D1056, and ASTM G21 requirements according to selected material and specification.

Do you support OEM customization?

Yes. DABUND supports OEM and ODM customization, including logo printing, custom packaging, private labeling, insulation thickness, custom length, and custom pipe size combinations.

What are your payment terms?

Payment terms can include TT, L/C at sight, credit card, and other agreed payment methods depending on order details and customer requirements.

What are your delivery terms?

Delivery terms can include EXW, FOB, CFR, CIF, and other international trade terms according to buyer logistics requirements.

Are you a trading company or manufacturer?

DABUND is a manufacturer of insulated copper pipe, mini split line sets, aluminum pipe, and HVAC parts.

Can I get a sample before bulk order?

Yes. DABUND can send 3 pieces of free samples. The buyer only needs to cover the express cost.

How long is your delivery time?

Normal delivery time is usually 15–20 days. For urgent orders, DABUND can arrange production and delivery in advance when capacity allows.