100 ft 1/4″ × 5/8″ Pre-Insulated Copper Tubing – HVAC Refrigerant Line Set

The 100 ft 1/4″ × 5/8″ pre-insulated copper tubing is a high-performance HVAC refrigerant line set designed for long-distance installations in mini split air conditioners, ductless heat pumps, split systems, and other residential or light commercial cooling applications requiring extended reach and reliable performance.

The 100 ft 1/4" x 5/8" Pre insulated copper tubing is twin already. So buy it now.

Product Overview – Long-Length Pre-Insulated Refrigerant Tubing

This pre-insulated copper tubing combines a 1/4″ liquid line and a 5/8″ suction line with factory-applied thermal insulation to preserve refrigerant temperature over long runs, reduce energy loss, and prevent condensation. Its 100 ft lengths provide flexibility and convenience for installations where indoor and outdoor units are widely spaced.

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Line Size Breakdown – 1/4″ & 5/8″ Explained

• 1/4″ (≈6.35 mm) Liquid Line: Carries liquid refrigerant from the condenser to the evaporator.

• 5/8″ (≈15.88 mm) Suction Line: Returns low-pressure refrigerant vapor back to the compressor.

• Common size pairing ideal for mid-capacity mini splits and split air conditioning systems.

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Factory-Applied Insulation for Thermal Performance

• Factory insulation helps maintain consistent refrigerant temperatures

• Reduces heat gain/loss along the tube run

• Minimizes surface condensation (sweating) and water drips

• Saves installation time by eliminating field insulation wrap

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Key Features & Benefits

Extended Line Length for Flexible Installations

At 100 ft, this tubing set offers enough length to cover:

• Multi-story buildings

• Rooftop or terrace condenser placement

• Long distance between indoor and outdoor units

• Larger residential or light commercial HVAC projects

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Enhanced Energy Efficiency

Keeping refrigerant temperature stable over long tubing runs helps maximize cooling or heating output while reducing strain on the system and lowering energy consumption.

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Strong & Durable Copper Construction

Manufactured from 99.9% pure copper, this tubing offers:

• Excellent corrosion resistance

• High thermal conductivity

• Long-lasting performance under repeated HVAC cycles

• High structural reliability

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HVAC Compatibility & Applications

Designed for Mini Split & Split System HVAC Units

This pre-insulated copper tubing is suitable for:

• Mini split air conditioners

• Ductless heat pump systems

• Split system air conditioners

• Residential and light commercial HVAC configurations

Perfect for installs where line distance exceeds basic sizing options.

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Compatible with Popular Refrigerants

Engineered to work with standard modern refrigerants such as:

• R410A

• R32
  …and other commonly used HVAC refrigerants when installed according to guidelines and local codes.

Features of pipe insulation tubing:

Technical Specifications

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Installation Tips for Optimal Performance

Plan the Line Route Before Installation

Measure the total run between indoor and outdoor units before installation to ensure the tubing can be routed smoothly without tight bends or stress points that can impair refrigerant flow.

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Protect Insulation at Penetrations

Use wall sleeves or grommets where the tubing passes through walls or structural penetrations. This preserves insulation integrity and prevents abrasion or damage.

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Secure Tubing With HVAC-Rated Supports

Use straps, clips, or mounting brackets to secure the tubing along the run. Proper support prevents sagging, reduces vibration, and protects insulation from compression or dislodging.

Insulated Copper Tubing

Size	Length	Insulation White PE	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

1/4 + 3/8 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 piping 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 Insulated copper pipe used for 54000 BTU and 72000 split air conditioner installation.

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

Why Choose 100 ft 1/4" x 5/8" Pre Insulated Copper Tubing from DABUND PIPE

Engineered for Extended HVAC Line Runs

A 100 ft pre-insulated tubing set provides the flexibility and performance needed for installations where indoor and outdoor units are far apart — without requiring multiple splices or couplings.

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Improves System Efficiency & Reduces Energy Loss

Factory insulation preserves refrigerant temperatures and minimizes energy loss, helping split systems deliver stronger cooling and heating performance across longer distances.

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Durable Materials & Long-Term Reliability

High-quality copper construction and robust insulation make this tubing long-lasting, corrosion-resistant, and dependable for repeated HVAC cycles in residential or light commercial settings.

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″ × 5/8″” mean?

It refers to the outer diameters of the refrigerant tubing — 1/4″ liquid line and 5/8″ suction line — a common size pairing for many mini split and split system HVAC installations.

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8.Is this tubing insulated?

Yes — this copper tubing has factory-applied insulation that improves thermal retention, reduces condensation, and eliminates the need for additional field insulation in most installs.

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9.Can this be used outdoors?

Absolutely — the insulation jacket is designed to be UV-resistant and weather-durable, making it suitable for outdoor refrigerant runs between indoor and outdoor HVAC units.

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10.Is this compatible with R410A systems?

Yes — this tubing supports common refrigerants like R410A and R32 when installed according to HVAC system guidelines and local codes.