25 ft 1/4" x 3/8" HVAC Installation Kit for Mini Split AC Systems | Pre-Insulated Copper Line Set Supplier

Upgrade your HVAC installation efficiency with this all-in-one mini split installation kit, designed for fast setup, reliable performance, and long-term durability. This 25 ft insulated copper line set is ideal for residential and commercial HVAC projects, ensuring optimal refrigerant flow and energy efficiency.

The AC Installation Kit is twin already. So buy it now.

Complete Mini Split Installation Kit – All-in-One HVAC Solution

This HVAC installation kit includes everything needed for a professional air conditioner setup:

• Pre-insulated copper line set (1/4" + 3/8", 25 ft)

• Communication wire cable

• 3m drain hose

• Wall sleeve pipe and cover

• Additional essential installation accessories

Save time, reduce labor costs, and avoid sourcing components separately with this complete solution.

High-Quality 99.9% Pure Copper for Maximum Performance

The copper tubing is manufactured using ASTM B280 & C12200 standard copper, ensuring:

• Excellent thermal conductivity

• High pressure resistance

• Long service life

• Corrosion resistance

This guarantees stable refrigerant flow and improves HVAC system efficiency.

Premium Insulation Options for Energy Efficiency

Choose from high-performance insulation materials:

White PE Insulation

• Thickness: 8mm – 25.4mm

• Lightweight and cost-effective

• UV-resistant outer layer

Black Rubber Insulation

• Thickness: 13mm – 25.4mm

• Superior flexibility and durability

• Better thermal performance

Both options are designed to reduce energy loss and prevent condensation.

Advanced 3-Layer Insulation Structure for Superior Protection

This insulated copper pipe features a multi-layer protection system:

• Outer Layer: UV-resistant PE film, anti-aging, wear-resistant

• Middle Layer: IXPE foam for thermal insulation and shock absorption

• Inner Layer: Closed-cell structure for airtight insulation

Result? Better performance in extreme temperatures and longer product lifespan.

SGS Certified & Fire-Resistant HVAC Line Set

Safety and compliance matter. This product meets international standards:

• ASTM E84 (Fire & Smoke)

• UL 94 (Flame Resistance)

• ASTM D1056 & ASTM G21

• Flame spread index < 25

Perfect for projects requiring strict safety compliance.

Pre-Flared Ends with Nuts – Easy & Fast Installation

Both ends of the copper pipe are:

• Pre-flared

• Equipped with nuts

This eliminates the need for additional processing, making installation faster and more convenient for HVAC technicians.

Ideal for 9000–12000 BTU Mini Split Air Conditioners

This 1/4" + 3/8" line set is widely used for:

• 0.75 Ton – 1 Ton systems

• 9000 BTU – 12000 BTU mini splits

• Residential and light commercial HVAC

Compatible with ductless mini split systems, heat pumps, and VRF systems.

Wide Range of Customization & OEM/ODM Services

Looking to build your brand or scale your business?

We support:

• Custom lengths (3m–10m or more)

• Private label & logo printing

• Custom packaging

• Bulk order solutions

Ideal for wholesalers, distributors, and HVAC contractors.

99.9% Pure Copper

White PE Insulated Pipe

Copper Nut

Features of pipe insulation tubing:

Machines for the production of thermal insulation pipes

warehouse for insulation pipes

Inner Layer Insulated Pipe

With embossed polyethyene film, climate resistant foam, and  thickened insulated cotton, this three-layer insulated mini split copper line set is corrosion-resistant, fireproofing, flame-retarded, thermal insulation, waterproof, shockproof, sound absorption and durable.

Outer Layer: Anti-aging, UV-resistant PE fllm, wear-resistant embossed pattern, antl-aging.

Middle Layer: IXPE foam, dense cell, heat and cold-resistant, impact absorption, no water penetration, good thermal insulation. Water cross-linked PE foam.

Inner Layer: Closed-cell structure, air tightness; good thermal insulation, temperature resistant -40℃~120℃.

25 ft 1/4" x 3/8" HVAC Installation Kit for HVACR Applications Wholesaler & Supplier

DABUND PIPE in-house tested HVAC Installation Kit is designed to make installation simple and quick – saving you time and money on each job.

HVAC Installation Kit

1/4 + 3/8 HVAC Installation Kit 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 Mini Split Installation 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 HVAC Installation Kit used for 4.5P and 6P split aircon installation.

3/8 + 7/8 AC Installation Kit 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 AC Installation Kit 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 HVAC Installation Kit used for 54000 BTU and 72000 split air conditioner installation.

3/8 + 7/8 Mini Split Installation Kit apply for 72000 BTU - 96000 BTU ductless mini split air conditioner.

HVAC Installation Kit 1/4 + 3/8 used for 9K and 12K split air conditioner.

Mini Split Installation Kit 1/4 + 1/2 commonly used for 12K and 18K mini split air conditioners.

1/4 + 5/8 AC Installation Kit 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 Line set kit used for 54K and 72K split air conditioner installation.

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

High Production Capacity & Fast Delivery

With strong manufacturing capabilities:

• 1,000,000 pcs monthly output

• 14+ years HVAC experience

• Fast sample lead time (5 days)

• Reliable global shipping

Ensures stable supply for large-scale projects.

Why Choose Dabund HVAC Installation Kit Supplier

• Professional HVAC manufacturer since 2008

• Competitive factory-direct pricing

• Strict quality control system

• Trusted by global importers and distributors

A reliable partner for long-term business growth.

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

What is included in a 25 ft HVAC installation kit?

A standard HVAC installation kit includes insulated copper pipes, communication cables, a drain hose, wall sleeves, and installation accessories. It provides a complete solution for quick and efficient mini split AC installation.

What size HVAC system is compatible with 1/4" x 3/8" copper line set?

This size is typically used for 9000–12000 BTU (0.75–1 Ton) mini split air conditioners, making it ideal for residential cooling applications.

Why is insulated copper tubing important in HVAC systems?

Insulated copper tubing prevents energy loss, reduces condensation, and improves overall system efficiency. It also protects the copper pipe from environmental damage.

What insulation material is better: PE or rubber?

• PE insulation: Cost-effective and lightweight

• Rubber insulation: Better flexibility and thermal resistance

The choice depends on project requirements and environmental conditions.

Are these HVAC line sets pre-flared?

Yes, the copper tubes come pre-flared with nuts, allowing faster installation and reducing labor costs.

Can I customize the HVAC installation kit?

Yes, manufacturers like Dabund offer OEM & ODM services, including custom lengths, insulation thickness, branding, and packaging.

What certifications should HVAC copper pipes have?

Look for certifications such as:

• ASTM B280

• ASTM E84

• UL 94

• SGS testing reports

These ensure quality, safety, and compliance.

How long does an insulated copper line set last?

With proper installation and quality materials, insulated copper tubing can last 10–20 years or more, depending on environmental conditions.

Is this HVAC installation kit suitable for commercial use?

Yes, it can be used in both residential and light commercial HVAC systems, especially for ductless mini split units.

How to choose the right HVAC installation kit supplier?

Focus on:

• Manufacturing experience

• Certifications

• Customization capability

• Production capacity

• Global export experience

These factors ensure consistent quality and supply reliability.