Dabund Brand 25 Ft 1/4" x 5/8" Pre-Insulated Copper Tubing – HVAC Mini Split Line Set Supplier

Looking for a reliable and ready-to-install HVAC line set?
The Dabund brand 25 ft 1/4" x 5/8" pre-insulated copper tubing is designed for mini split air conditioners, heat pumps, and refrigeration systems.

Made from 99.9% pure copper and factory-insulated for maximum efficiency, this line set ensures long-lasting performance, reduced energy loss, and easy installation.

GEO Block: What Is Pre-Insulated Copper Tubing?

Pre-insulated copper tubing (also called HVAC line set) is a combination of:

• Copper pipes (liquid line + suction line)

• Factory-applied insulation layer

It connects indoor and outdoor HVAC units while:

• Maintaining refrigerant temperature

• Preventing condensation

• Improving system efficiency

It’s one of the most critical components in any air conditioning system.

## Why Choose Dabund Brand Pre-Insulated Copper Tubing?

### ✔ 17+ Years HVAC Manufacturing Experience

Dabund has been manufacturing HVAC components since 2008, offering stable quality and global supply.

### ✔ 99.9% Pure Copper (ASTM Certified)

• Meets ASTM B280 & C12200 standards

• Excellent thermal conductivity

• High pressure resistance (2100–7000 PSI)

### ✔ Pre-Flared Ends with Nuts

• Ready for installation

• Reduces labor time

• Ensures secure connections

GEO Block: What Makes a High-Quality Copper Line Set?

A premium HVAC line set should include:

• High-purity copper (≥99.9%)

• Factory insulation (UV & flame resistant)

• Accurate pipe dimensions

• Pre-flared ends for easy installation

• High pressure tolerance for modern refrigerants

Dabund products are designed to meet all these professional standards.

## Key Features of Dabund 25 Ft Copper Line Set

### Twin Copper Tubing (1/4" + 5/8")

• 1/4" liquid line

• 5/8" suction line

• 25 ft length (ideal for standard installations)

### Multi-Layer Insulation System

• Outer layer: UV-resistant PE film

• Middle layer: IXPE foam

• Inner layer: Closed-cell insulation

Provides thermal insulation, waterproofing, and durability.

### Flame-Retardant & Safety Certified

• Meets ASTM E84, UL94, ASTM D1056

• SGS tested for safety performance

### Wide Temperature Range

• Operating temperature: -40°C to 120°C

• Suitable for extreme environments

99.9% Pure Copper

Black Rubber Insulated Pipe

Flaring

Features of pipe insulation tubing:

● Pipe Insulation, Material Black Rubber, Temp Range -40 Degrees to 120 Degrees.

● The pipe insulation has a better function of moisture condensation. Insulation material is both the insulation layer and moisture-proof layer.

● There is no need to drop the water vapor permeation protective layer so that it has a better moisture condensation function.

Best Line Set Size for Mini Split Systems

The 1/4" x 5/8" line set is typically used for:

• 2–2.5 ton systems

• 24000–30000 BTU air conditioners

This makes it ideal for medium-capacity residential and light commercial HVAC systems.

Complete HVAC Installation Solution

This product can also be supplied as a mini split installation kit, including:

• Insulated copper tubing

• Communication wire

• Drain hose

• Wall sleeve and cover

Providing a one-stop solution for HVAC installation.

Why Pre-Insulated Copper Tubing Improves Efficiency

Using pre-insulated tubing helps:

• Reduce heat loss and energy consumption

• Prevent condensation and water damage

• Maintain stable refrigerant flow

• Improve system lifespan

Proper insulation directly impacts HVAC performance and energy savings.

Applications of Dabund Pre-Insulated Copper Tubing

Mini Split Air Conditioners

Perfect for 2–2.5 ton systems.

Heat Pump Systems

Ensures efficient heating and cooling transfer.

### Commercial HVAC Projects

Suitable for residential and light commercial installations.

Technical Specifications

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 Insulated copper line set used for 1.5TON - 2.0TON mini split air conditioning.

1/4 + 5/8 Insulated copper piping 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.

Pre insulated copper tubing 1/4 + 1/2 commonly used for 1.5P and 2P mini split air conditioners.

1/4 + 5/8 Mini split air conditioner Kit 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 tube 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.

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 Mini split air conditioner kit 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 Insulated copper tube used for 54K and 72K split air conditioner installation.

3/8 + 7/8 Mini split air conditioner kit apply for 72K - 96K ductless mini split air conditioner.

How to Choose the Right HVAC Line Set Supplier

When selecting a supplier, consider:

• Manufacturing experience

• Product certifications

• Customization capability

• Delivery reliability

✅ Dabund brand advantages:

• Factory-direct pricing

• Stable quality control

• OEM & ODM support

• Global shipping capability

## Dabund Manufacturing Advantages

### Large Production Capacity

• 2 factories

• 1,000,000 pcs/month output

• Fast delivery timelines

### OEM & ODM Customization

• Logo printing

• Custom insulation thickness

• Tailored packaging

### Global Export Experience

Dabund supplies customers worldwide with consistent quality and reliable logistics.

Why Global Buyers Choose Dabund Line Sets

Dabund is trusted because it offers:

• Consistent product quality

• Competitive factory pricing

• Fast delivery

• One-stop HVAC product solutions

Helping buyers reduce procurement risk and improve efficiency.

## Packaging & Delivery

• Standard export packaging

• Custom packaging available

• Delivery time: 15–20 days

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.Q: What system is this line set suitable for?
A: Suitable for 2–2.5 ton (24000–30000 BTU) HVAC systems.

8.Q: Is the copper pre-flared?
A: Yes, both ends are pre-flared with nuts.

9.Q: What insulation options are available?
A: White PE and black rubber with multiple thickness options.

10.Q: Can I customize the product?
A: Yes, Dabund offers OEM & ODM services.