3/8 in × 7/8 in × 100 ft Copper Line Set – Pre-Insulated HVAC Refrigerant Line

Professional-grade 100 ft copper refrigerant line set with 3/8″ liquid line and 7/8″ suction line, engineered for HVAC systems, mini split air conditioners, ductless heat pumps, and commercial cooling applications where extended run lengths are required and energy efficiency matters.

The Mini Split Air Conditioner Line Set is twin already. So buy it now.

Product Overview – Long-Length HVAC Refrigerant Line Set

The 3/8 in × 7/8 in × 100 ft copper line set delivers a durable, reliable path for refrigerant flow between indoor and outdoor units. Its extended 100 ft length provides flexibility for installations where indoor and outdoor components are far apart — common in multi-story homes, large workplaces, and rooftop AC systems. The copper tubing is pre-insulated to maintain refrigerant temperature, reduce heat loss, and minimize condensation.

Standard 3/8″ × 7/8″ Refrigerant Line Configuration

• 3/8″ liquid line for refrigerant supply from outdoor to indoor unit.

• 7/8″ suction line for refrigerant return back to compressor.

• Widely used pairing for larger HVAC systems and higher capacity mini split units. The 7/8″ suction line supports greater refrigerant volume than smaller tubing setups.

Extended 100 ft Run for Flexible Installations

• Great choice for multi-story residential properties and commercial spaces.

• Reduces the need for multiple intermediate couplings, which can introduce leak points.

• Supports versatile routing through ceilings, walls, attics, and basements.

Factory-Applied Insulation – Thermal Efficiency & Condensation Control

Optimized Thermal Performance

Pre-insulated tubing helps preserve the refrigerant’s temperature as it travels between components, reducing energy loss and helping your HVAC system operate more efficiently. For cooling applications especially, controlling temperature loss along the line set improves performance and reduces energy waste.

Reduces Condensation and Moisture Damage

Surface condensation is a common concern when refrigerant tubing operates in humid conditions. Pre-insulated copper lines significantly reduce sweating and dripping, helping protect nearby structural materials, walls, and ceilings from moisture damage and mold.

UV-Resistant, Weather-Durable Insulation Jacket

The insulation jacket is designed to be UV-resistant and capable of withstanding outdoor exposure. Whether your installation is above a rooftop condenser, along an exterior building wall, or within a climate-controlled attic, this insulation helps protect the copper tubing from environmental wear.

High-Quality Copper Construction

99.9% Pure Copper Tubing

Constructed from 99.9% pure copper that complies with industry standards like ASTM B280 and C12200, this line set provides excellent thermal conductivity, corrosion resistance, and mechanical strength. Copper’s metallurgical properties make it ideal for refrigerant line sets that must operate under pressure and temperature swings.

Built for High-Pressure HVAC Operation

This line set supports pressures significantly above typical HVAC operating ranges (often rated up to 7000 PSI), ensuring the tubing can handle modern refrigerants like R410A and R32 safely across full cooling and heating cycles.

99.9% Pure Copper

White PE Insulated Pipe

Plastic Cap

Features of pipe insulation tubing:

Machines for the production of thermal insulation pipes

warehouse for insulation pipes

Inner Layer Insulated Pipe

HVAC Compatibility & Typical Applications

Ideal for Mini Split & Ductless AC Installations

This 100 ft line set is perfect for applications where the indoor and outdoor units are separated by long distances, including:

• Ductless mini split air conditioners

• Multi-zone HVAC systems

• Heat pump installations

• Residential, commercial, and institutional HVAC projects

Works with Standard HVAC Refrigerants

Designed to be compatible with modern HVAC refrigerants used in the US market, including:

• R410A

• R32

• Other industry-standard refrigerants used in ductless and split systems
  Compatibility supports reliable performance when installed according to manufacturer and code specifications.

Key Benefits of This 100 ft Copper Line Set

Long-Distance Connection Without Compromise

A single 100 ft continuous run reduces installation complexity vs multiple short sections tied together. Fewer joints mean fewer leak points and smoother refrigerant flow.

Improves Energy Efficiency

Stable refrigerant temperature across the line set helps maintain system efficiency, reducing unnecessary thermal loss and supporting a balanced load on compressors and heat exchangers.

Durable Construction for Long-Term Use

Copper is inherently corrosion-resistant and highly conductive. Paired with quality insulation, this line set is designed for years of trouble-free performance.

Technical Specifications

Installation Tips for Best Performance

Plan Your Line Routing Before Install

Measure your total indoor-to-outdoor run before installation. Proper planning helps you avoid sharp bends, unnecessary stress on the tubing, and possible insulation compression points.

Protect Insulation at Penetration Points

Use wall sleeves, grommets, or protective conduit where the line set passes through structural penetrations. This helps preserve insulation integrity and prevents abrasion damage to the insulation jacket.

Support Long Runs with Proper HVAC Brackets

Secure the line set at regular intervals with HVAC-rated clips or brackets to minimize vibration, prevent sagging, and maintain insulation performance over time. This also reduces wear from movement and environmental stress.

Copper Line Set

1/4 + 3/8 Mini split refrigerant line set used for 0.75TON - 1.0TON mini split air conditioner.

1/4 + 1/2 Mini split line set used for 1.5TON - 2.0TON mini split air conditioning.

1/4 + 5/8 Copper line set used for 2.0TON - 2.5TON split air conditioner system.

3/8 + 5/8 Insulated copper tube apply for 3.0TON - 4.0TON ductless mini split air conditioner.

3/8 + 3/4 Insulated copper tubing used for 4.5TON - 6.0TON split air conditioner installation.

3/8 + 7/8 Insulated copper piping apply for 6.0TON - 8.0TON ductless mini split air conditioner.

Air conditioning copper line sets 1/4 + 3/8 used for 0.75P and 1P split air conditioning.

Copper pipe kit 1/4 + 1/2 commonly used for 1.5P and 2P mini split air conditioners.

1/4 + 5/8 Insulated copper line set used for 2P and 2.5air conditioner system.

3/8 + 5/8 Mini-split copper line set apply for 3P and 4P ductless mini split air conditioner.

3/8 + 3/4 Copper pipe kit used for 4.5P and 6P split aircon installation.

3/8 + 7/8 Insulated copper piping apply for 6P - 8p TON ductless mini split air conditioner.

1/4 + 3/8 Mini split line set used for 9000BTU and 12000 BTU split air conditioner.

All copper line set 1/4 + 1/2 commonly used for 12000 BTU and 18000 BTU mini split air conditioners.

1/4 + 5/8 Insulated copper line set used for 24000 BTU and 30000 BTU air conditioner system.

3/8 + 5/8 Mini-split line set apply for 36000 BTU and 48000 ductless air conditioner.

3/8 + 3/4 Copper line set used for 54000 BTU and 72000 split air conditioner installation.

3/8 + 7/8 Insulated copper piping apply for 72000 BTU - 96000 BTU ductless mini split air conditioner.

Aircon copper line set 1/4 + 3/8 used for 9K and 12K split air conditioner.

High quality copper line set 1/4 + 1/2 commonly used for 12K and 18K mini split air conditioners.

1/4 + 5/8 Insulated copper line set used for 24K and 30K air conditioner system.

3/8 + 5/8 Mini-split line set apply for 36K and 48K ductless air conditioner.

3/8 + 3/4 Copper line set used for 54K and 72K split air conditioner installation.

3/8 + 7/8 Insulated copper pipe apply for 72K - 96K ductless mini split air conditioner.

Why Choose This 100 ft Copper Line Set?

Ready for Long-Distance and High-Performance HVAC Installations

Whether you’re working on a multi-story house, a large commercial property, or installing a complex ductless HVAC setup, this 100 ft copper line set delivers the extended reach and performance you need.

Factory-Insulated for Better Thermal Efficiency

The added insulation not only protects against condensation and heat gain/loss but also removes the need for field insulation wrap, saving time and ensuring consistent quality.

Durable, Certified, and Installation-Ready

Constructed from 99.9% pure copper and factory-finished with quality insulation, this line set meets industry standards and is ready for installation in a wide range of HVAC projects.

DABUND FACTORY

We produce Insulated Copper Pipe, Mini Split Line Set and Aluminum Pipe and HVAC Parts

SGS Certificate

Mini Split Line Set is made of Polypropylene or Black Rubber with UV Resistant, meets ASTM E 84, UL94, ASTM D1056 and ASTM G 21

Exhibition

We join the exhibitions all over the word, just to facilitate customers to experience our mini split line set face to face.

FAQ

1.Q:What is your payment terms?

A:TT,L/C AT SIGHT,CREDIT CARD etc

2.Q:What is your delivery terms?

A:EXW, FOB, CFR, CIF etc

3.Q:Are you trading company or manufacturer?

A:Manufacturer

4.Q:May I get a sample?

A:Yes, we can send you 3pieces free samples.

   You just charge for the express cost is ok.

5.Q:Can I print my logo?

A:Yes of cause, we accept OEM and ODM.

6.Q:How long is your delivery time?

A:Usually 15-20days, if urgent, we can arrange to do in advance and delivery fast.

7.What does “3/8 in × 7/8 in” refer to?

This specifies the outside diameters of the two copper tubes: 3/8″ for the liquid refrigerant line and 7/8″ for the suction return line, a common sizing choice for higher capacity HVAC systems, ductless mini splits, and larger residential/commercial installations.

8.Is this line set suitable for outdoor use?

Yes — the insulation jacket on this copper line set is UV-resistant and weather-durable, designed for use in exterior runs between indoor and outdoor HVAC units.

9.Do I need extra insulation in the field?

No — this product comes with factory-applied insulation that meets typical HVAC insulation requirements. Additional field insulation is not usually necessary for standard installations.

10.Can this be used with R410A systems?

Yes — this line set supports common modern refrigerants like R410A and R32 when installed in accordance with system specifications and local codes.