100 ft 1/4″ × 3/8″ Pre-Insulated Copper Tubing – HVAC Refrigerant Line Set

HVAC Parts are produced by Dabund Pipe since 2008 years.

100 ft 1/4" x 3/8" Pre insulated copper tubing line set. Easy to be installed. White PE insulation 1/2" has good flame retardant performance, up to 120℃ and suitable for any construction.

The insulated copper tube is twin already. So buy it now.

Product Overview – Long-Length HVAC Refrigerant Tubing

This pre-insulated copper tubing line set features a 1/4″ liquid line and a 3/8″ suction line, each with factory-applied insulation designed to help maintain stable refrigerant temperatures, minimize thermal loss, and reduce condensation. The extended 100 ft length makes this line set an ideal choice for installations where indoor and outdoor units are spaced far apart.

Standard Refrigerant Tube Sizes Explained

• 1/4″ (≈6.35 mm) Liquid Line: Transports high-pressure liquid refrigerant from the outdoor unit to the indoor evaporator.

• 3/8″ (≈9.52 mm) Suction Line: Returns low-pressure refrigerant vapor back to the outdoor compressor.

• This size pairing is commonly used in mini split and ductless HVAC systems for balanced refrigerant flow.

Factory-Applied Insulation for Thermal Efficiency

The line set comes with factory-applied insulation that provides:

• Consistent refrigerant temperature control over long distances

• Reduced heat gain and thermal loss

• Condensation prevention (“sweating”)

• Faster installation without needing field insulation wrapping

Key Features & Benefits

Long-Distance HVAC Line Capabilities

With 100 ft of pre-insulated copper tubing, this line set gives installers flexibility for challenging runs — such as multi-story buildings, rooftop condensers, and installations where the distance between indoor and outdoor units is significant.

Enhanced HVAC Energy Efficiency

Factory-insulated tubing helps reduce thermal loss along the line set, improving overall system efficiency and reducing unnecessary energy usage during cooling and heating cycles.

Strong & Durable Copper Construction

Made from 99.9% pure copper, this tubing reliably resists corrosion, provides strong thermal conductivity, and withstands the pressures of HVAC operation — delivering long-term reliability in residential and light commercial applications.

HVAC Compatibility & Applications

Ideal for Mini Split & Ductless HVAC Systems

This 100 ft pre-insulated copper tubing is suitable for:

• Mini split air conditioners

• Ductless heat pump systems

• Split system installations

• Residential HVAC projects

• Light commercial cooling systems

Perfect for scenarios where standard line sets don’t provide enough reach.

Works With Standard HVAC Refrigerants

Compatible with commonly used refrigerants like:

• R410A

• R32
  …and other modern refrigerants when properly installed according to manufacturer instructions 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 Installing

Before installation, measure the total distance between indoor and outdoor units. Planning your routing helps avoid sharp bends and stress points that could restrict refrigerant flow or compress the insulation.

Protect Insulation at Wall Penetrations

Use wall sleeves or protective grommets where the tubing passes through walls, studs, or metal surfaces. This preserves the insulation quality and prevents abrasion damage.

Support Line Set With Proper HVAC Brackets

Install HVAC-rated straps, clips, or brackets along the tubing run to:

• Reduce vibration

• Prevent sagging

• Maintain insulation integrity

This also helps reduce noise and stress on the connections over time.

Pre Insulated Copper Tubing

1/4 + 3/8 Pre insulated copper tubing 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 tubing 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 tubing 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 1/4" x 3/8" Pre Insulated Copper Tubing from DABUND PIPE

Reliable Performance for HVAC Installations

Factory-insulated tubing with durable copper construction supports consistent refrigerant flow, strong thermal performance, and minimal moisture issues — critical for long-term HVAC operation.

Saves Installation Time & Costs

Factory-applied insulation eliminates the need for field insulation wrap and reduces labor time, material waste, and installation complexity.

Versatile for Many Systems

Whether for residential mini split systems, ductless heat pumps, or light commercial HVAC projects, this 100 ft line set offers the reach, durability, and performance installers trust.

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 “1/4″ × 3/8″” mean?

It refers to the outer diameters of the two refrigerant tubes: 1/4″ liquid line (refrigerant feed) and 3/8″ suction line (refrigerant return). This configuration is commonly used in mini split and ductless HVAC systems for balanced refrigerant flow.

8.Is this tubing insulated?

Yes — this product includes factory-applied insulation that helps reduce thermal loss, minimize condensation, and eliminate the need for separate field insulation in most installations.

9.Can this line set be used outdoors?

Yes — the factory insulation is UV-resistant and weather-durable, making it suitable for outdoor line runs between indoor and outdoor HVAC components.

10.Is this compatible with R410A systems?

Yes — this pre-insulated copper tubing supports common refrigerants like R410A and R32 when installed according to system specifications and local building codes.