Home Mini Split Line Set Mini Split Line Set Sizes 1/4" x 3/8" x 100 ft Mini Split Line Set – Insulated Copper Pipe for Long HVAC Installations

8" x 100 ft Mini Split Line Set – Insulated Copper Pipe for Long HVAC Installations

1. 1/4" x 3/8" is the out dimension in inch. 6.35mm - 9.52mm is the out dimension in metric.

2. 99.9% Pure copper pipe meets ASTM B280 and C12200 standard.

3. AC Copper Size what we can do have following 1/4" 3/8" 1/2" 5/8" 3/4" 7/8" 1 1/8", length can do 15m 20m 25m 30m 50m.

4. Insulation is made of 1/2" Polypropylene & UV Resistant, meets ASTM E 84, UL94, ASTM D1056 and ASTM G 21. Working temperature from -40℃ to 120℃.

5. Works for every Air Conditioning & Refrigeration Application including Ductless mini-split, heat pump and Centralized Air Ducted Units.

6. Pressure Rating: 2100 to 7000 PSI, much more than required 700 PSI for R410.

7. Insulation we produce by ourself, can print your company name, size, meters etc.

Model：
DBJ-003
Brand：
DABUND
Material：
Copper
Length：
1M - 50M

Material

99.9% pure copper

Color

Black/White

Keywords

Mini Split Line Set Sizes

Application

HVAC

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100 ft Insulated Copper Line Set for HVAC Systems

Looking for a reliable 100 ft mini split line set for extended HVAC installations? This 1/4" x 3/8" insulated copper line set is designed for efficient refrigerant transfer, high pressure resistance, and long-distance performance.

Perfect for mini split air conditioners, heat pumps, and residential HVAC systems, this line set ensures stable operation even in complex layouts.

This mini split line set includes two copper tubes (liquid line + suction line) pre-insulated for improved efficiency and faster installation.

Manufactured from 99.9% pure copper (C12200) and compliant with ASTM B280, it delivers excellent thermal conductivity and corrosion resistance—critical for long-term HVAC reliability.

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Key Features of 1/4" x 3/8" x 100 ft Mini Split Line Set for HVAC Systems

High-Purity 99.9% Copper for Maximum Efficiency

Premium copper ensures:

Superior heat transfer Reduced energy loss Long service life

Think of it as a high-speed pipeline for refrigerant flow.

Professional drivers

Built to meet international HVAC standards:

ASTM B280 refrigeration copper tubing C12200 DHP copper grade

Ensuring safe and durable operation in HVAC systems.

High Pressure Rating (2100–7000 PSI)

Supports modern refrigerants such as:

R410A R32

With pressure capacity far exceeding standard requirements—ensuring leak-free performance.

100 ft Long Line Design for Flexible Installation

This extended length is ideal for:

Long-distance indoor-to-outdoor connections Multi-room setups Complex building layouts

Perfect when installation flexibility is essential.

Standard Size for Small HVAC Systems

Liquid Line: 1/4" (6.35 mm)

Suction Line: 3/8" (9.52 mm)

Commonly used for: 9,000 – 12,000 BTU mini split systems

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.

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Detail of 1/4" x 3/8" x 100 ft Mini Split Line Set for HVAC Systems

Insulated Copper Pipe

Black Rubber Insulated Pipe

Copper Coil

Plastic Cap

Advanced Insulation Technology for Maximum Performance

UV-Resistant & Flame-Retardant Insulation

The insulation meets:

ASTM E84

UL94

ASTM D1056

ASTM G21

Operating temperature range: -40°C to 120°C, suitable for indoor and outdoor installations.

3-Layer Insulation Structure

Outer Layer: UV-resistant embossed PE film (anti-aging & wear-resistant)

Middle Layer: IXPE foam (thermal barrier, impact resistant)

Inner Layer: Closed-cell insulation (airtight & moisture-proof)

Works like a thermal armor, protecting system efficiency over time.

Condensation & Energy Loss Prevention

This insulation system:

Prevents moisture buildup

Reduces heat transfer loss

Improves overall HVAC efficiency

Result? Lower energy consumption and longer system lifespan.

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Applications – Where This Mini Split Line Set Performs Best

Ductless Mini Split Air Conditioners

Ideal for residential installations requiring long pipe runs.

Heat Pump Systems

Supports both heating and cooling cycles efficiently.

Residential & Light Commercial HVAC

Suitable for:

Homes

Offices

Small commercial buildings

Compatible with most HVAC systems and refrigerants.

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Technical Specifications of 1/4" x 3/8" x 100 ft Mini Split Line Set

Product Name	Mini Split Line Set
Size	1/4" + 3/8"
Length	100 ft (30 m)
Material	99.9% Pure Copper
Standard	ASTM B280 / C12200
Pressure Rating	2100–7000 PSI
Temperature Range	-40°C to 120°C
Insulation	UV-resistant PE / IXPE Foam
Application	HVAC & Refrigeration Systems

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Data of Mini Split Line Set

Size	Length	Insulation Black Rubber	Flame Resistant
1/4+3/8	15m/20m/25m/30m/50m	8mm/9mm/10mm/13mm/19mm/25.4mm	M1/B1
1/4+1/2	15m/20m/25m/30m/50m	8mm/9mm/10mm/13mm/19mm/25.4mm	M1/B1
1/4+5/8	15m/20m/25m/30m/50m	8mm/9mm/10mm/13mm/19mm/25.4mm	M1/B1
3/8+5/8	15m/20m/25m/30m/50m	8mm/9mm/10mm/13mm/19mm/25.4mm	M1/B1
3/8+3/4	15m/20m/25m/30m/50m	8mm/9mm/10mm/13mm/19mm/25.4mm	M1/B1
1/2+3/4	15m/20m/25m/30m/50m	8mm/9mm/10mm/13mm/19mm/25.4mm	M1/B1
3/8+7/8	15m/20m/25m/30m/50m	8mm/9mm/10mm/13mm/19mm/25.4mm	M1/B1

Size	Used for	Size	Used for
1/4 + 3/8 AC line set	0.75TON - 1.0TON mini split air conditioner	1/4 + 3/8 Mini split line set	9000BTU and 12000 BTU split air conditioner
1/4 + 1/2 Mini split line set	1.5TON - 2.0TON mini split air conditioning	All copper line set 1/4 + 1/2	12000 BTU and 18000 BTU mini split air conditioners
1/4 + 5/8 Copper line set	2.0TON - 2.5TON split air conditioner system	1/4 + 5/8 Insulated copper line set	24000 BTU and 30000 BTU air conditioner system
3/8 + 5/8 Insulated copper tube	3.0TON - 4.0TON ductless mini split air conditioner	3/8 + 5/8 Mini-split line set	36000 BTU and 48000 ductless air conditioner
3/8 + 3/4 Insulated copper tubing	4.5TON - 6.0TON split air conditioner installation	3/8 + 3/4 Mini split line set	54000 BTU and 72000 split air conditioner installation
3/8 + 7/8 Insulated copper piping	6.0TON - 8.0TON ductless mini split air conditioner	3/8 + 7/8 Insulated copper pipe	72000 BTU - 96000 BTU ductless mini split air conditioner
Air conditioning copper line sets 1/4 + 3/8	0.75P and 1P split air conditioning	Aircon copper line set 1/4 + 3/8	9K and 12K split air conditioner
Copper pipe kit 1/4 + 1/2 commonly	1.5P and 2P mini split air conditioners	Copper line set 1/4 + 1/2	12K and 18K mini split air conditioners
1/4 + 5/8 Line set for mini split	2P and 2.5air conditioner system	1/4 + 5/8 Insulated copper line set	24K and 30K air conditioner system
3/8 + 5/8 Mini-split copper line set	3P and 4P ductless mini split air conditioner	3/8 + 5/8 Mini-split line set	36K and 48K ductless air conditioner
3/8 + 3/4 Copper pipe kit	4.5P and 6P split aircon installation	3/8 + 3/4 Mini split line set	72K split air conditioner installation
3/8 + 7/8 Insulated copper piping	6P - 8p TON ductless mini split air conditioner	3/8 + 7/8 Insulated copper piping	72K - 96K ductless mini split air conditioner

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Why Choose This Mini Split Line Set from a Professional Supplier?

15+ Years HVAC Manufacturing Experience

Produced by a specialized manufacturer with extensive experience in HVAC copper piping and insulation systems since 2008.

In-House Insulation Production

Ensures:

Consistent insulation quality

Faster production cycles

Custom branding capability

OEM & Custom Branding Available

Customize:

Logo printing

Pipe markings

Packaging

Perfect for distributors and wholesalers.

Strong Global Supply Capability

Weekly container shipments

Stable export logistics

Scalable production capacity

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Installation Tips for Long Line HVAC Systems

Plan Line Routing Carefully

Keep the path as straight as possible to maintain refrigerant efficiency.

Avoid Excessive Bends

Too many bends can reduce system performance and increase pressure drop.

Maintain Proper Bend Radius

Prevent kinks that could damage copper tubing.

Keep Pipe Ends Sealed

Protect against dust and moisture contamination during installation.

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DABUND FACTORY

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

Package & Delivery

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.

2025 RACC

2025 AQUA-THERM TASHKENT

1/4 3/8 Mini Split Line Set 100 ft FAQ

What is your payment terms?

TT,L/C AT SIGHT,CREDIT CARD etc.

What is your delivery terms?

Are you trading company or manufacturer?

May I get a sample?

Can I print my logo?

How long is your delivery time?

What system capacity is this line set suitable for?

Can this line set handle modern refrigerants?

Is this suitable for outdoor installation?

Does it come pre-insulated?

Do you support OEM customization?

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