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

A high-quality 100 ft pre-insulated copper tube with 3/8″ liquid line and 7/8″ suction line, engineered for long-distance HVAC refrigerant connections in mini split air conditioners, ductless heat pumps, and other split system installations where extended line runs are required.

The Pre Insulated Copper Tube is twin already. So buy it now.

Product Overview – Long-Length Insulated Copper Refrigerant Tube

This pre-insulated copper tubing line set provides a continuous 100 ft run with factory-applied insulation — minimizing heat gain and loss while preventing surface condensation. Designed to improve HVAC efficiency and simplify installation, this line set reduces the need for field insulation and helps maintain stable refrigerant temperatures over long distances.

Standard HVAC Tube Sizes Explained

• 3/8″ (≈9.52 mm) Liquid Line — Transports high-pressure refrigerant from outdoor condenser to indoor evaporator.

• 7/8″ (≈22.23 mm) Suction Line — Returns low-pressure refrigerant vapor back to the compressor.

• Ideal for larger or high-capacity HVAC systems where longer line sets are needed.

Factory-Applied Insulation Enhances Efficiency

• Helps preserve consistent refrigerant temperatures

• Reduces thermal gain/loss along the tube length

• Minimizes condensation buildup (“sweating”)

• Saves installation time with pre-applied insulation

Key Features & Benefits

Long-Distance Refrigerant Lines for HVAC Systems

At 100 ft, this copper tube set provides extended reach for installations that typical shorter line sets cannot accommodate — such as rooftop units, detached outdoor units, or large home setups.

Improved Energy Efficiency

The insulated design enhances temperature stability, supporting better cooling and heating performance while helping reduce energy waste.

Durable Copper Construction

Made from 99.9% pure copper, this line set delivers superior corrosion resistance and thermal conductivity for reliable, long-term HVAC operation.

HVAC Compatibility & Applications

Suitable for Mini Split & Heat Pump Systems

This pre-insulated copper tube set works well with:

• Mini split air conditioners

• Ductless heat pump systems

• Residential HVAC setups

• Light commercial cooling systems

Whether extending an existing line run or installing a new system, this line set provides dependable performance.

Works With Common HVAC Refrigerants

Compatible with widely used refrigerants such as:

• R410A

• R32
  …and other modern refrigerants when installed according to system specifications and local codes.

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

Technical Specifications

Installation Tips for Best Performance

Plan the Line Path Before Install

Measure the distance between indoor and outdoor units to confirm the 100 ft run will provide a smooth, low-stress path with gentle bends and minimal sharp turns.

Protect Insulation at Penetrations

Use wall sleeves, grommets, or protective conduit where the line set passes through walls or structural elements to preserve insulation integrity.

Support Line Set With HVAC-Rated Mounts

Secure the line set every few feet with HVAC-rated clips or straps to prevent vibration, sagging, and insulation compression over time.

Pre Insulated Copper Tube

1/4 + 3/8 Pre insulated copper tube 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 pipe 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 Pre insulated copper tube used for 54000 BTU and 72000 split air conditioner installation.

3/8 + 7/8 Insulated copper pipe 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 Pre insulated copper tube 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 100 ft 3/8" x 7/8" Pre Insulated Copper Tube from DABUND PIPE

Engineered for Extended HVAC Line Runs

With a generous 100 ft length, this line set meets the needs of installations where indoor and outdoor units are far apart — eliminating the need for multiple short segments.

Consistent Thermal Performance

Factory insulation ensures consistent thermal protection and eliminates the need for field insulation, saving both labor and material costs.

Strong and Durable Build

Constructed with high-purity copper and factory insulation, this line set resists corrosion, thermal stress, and environmental wear — delivering reliable performance over time.

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″ × 7/8″” mean?

It refers to the outer diameters of the refrigerant tubing: 3/8″ liquid line for refrigerant feed and 7/8″ suction line for refrigerant return, commonly used in larger HVAC systems and mini splits requiring higher suction volume.

8.Is this tube set insulated?

Yes — the tubing comes with factory-applied insulation that helps preserve refrigerant temperatures and reduces condensation issues without additional field wrapping.

9.Can this be used outdoors?

Yes — the insulation jacket is designed to be weather-resistant and UV-durable, making this line set suitable for outdoor installations between indoor and outdoor units.

10.Is this compatible with R410A refrigerants?

Yes — this line set supports common refrigerants like R410A and R32 when installed according to manufacturer and local building codes.