3/8″ × 7/8″ × 30 ft Copper Line Set – HVAC Refrigerant Line Kit

Premium 30 ft copper HVAC line set with 3/8″ liquid line and 7/8″ suction line, designed for reliable refrigerant transport in mini split air conditioners, ductless heat pumps, and central HVAC systems.

The Mini Split Air Conditioner Line Set is twin already. So buy it now.

Product Overview – HVAC Line Set for Mini Split & AC Systems

This 3/8″ × 7/8″ × 30 ft copper line set is a twin-tube refrigerant connection solution connecting indoor and outdoor units. Constructed with 99.9% pure copper and factory insulation, it supports efficient cooling and heating cycles in a broad range of HVAC applications.

Standard 3/8″ × 7/8″ Refrigerant Line Configuration

• 3/8″ liquid line for refrigerant delivery

• 7/8″ suction line for low-pressure return

• Designed for higher-capacity mini split and ductless HVAC systems (e.g., ∼6 – 8 TON applications) based on typical industry sizing guidance.

30 ft Length for Compact to Mid-Range Runs

• Ideal for installations with moderate separation between indoor and outdoor units

• Perfect for single-zone or multi-zone indoor environments

• Reduces the need for additional line coupling or extension.

Factory-Applied Insulation – Thermal Efficiency & Moisture Protection

High-Performance Thermal Insulation

The insulation is made of polypropylene closed-cell foam that resists heat gain/loss along the copper tubing, helping maintain consistent refrigerant temperatures and improve overall HVAC efficiency.

Moisture Control & Condensation Reduction

Pre-insulated tubing minimizes surface condensation, protecting surrounding materials from moisture damage and reducing the risk of mold and corrosion.

UV-Resistant Insulation for Outdoor Use

Insulation meets standards such as ASTM E84, UL94, ASTM D1056, and ASTM G21, providing UV resistance and weather durability for outdoor exposed runs.

Premium Copper Construction for HVAC Reliability

99.9% Pure Copper Tubing

Manufactured from 99.9% pure copper that meets ASTM B280 & C12200 standards, this line set delivers excellent thermal conductivity and corrosion resistance for reliable long-term performance.

H3: Built for High Pressure & HVAC Demands

Rated at 2100–7000 PSI — well above the typical pressure requirement for modern refrigerants like R410A — ensuring durability and safety under normal operating conditions.

HVAC Compatibility & Applications

Designed for Mini Split & Ductless AC Systems

Ideal for connecting indoor evaporators to outdoor condensers in:

• Mini split air conditioners

• Ductless heat pumps

• Residential and light commercial HVAC installs.

Works With Common Refrigerants

Compatible with widely used HVAC refrigerants such as R410A, R32, and others when installed in accordance with system manufacturer requirements.

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

Key Benefits of This Line Set

Ready-to-Install Pre-Insulated Tubing

Factory insulation ensures performance consistency and eliminates the need for additional field insulation, saving time and reducing labor costs.

Improves HVAC System Efficiency

Stable refrigerant flow and minimal thermal loss help enhance overall system performance and energy efficiency.

Durable & Corrosion-Resistant

Copper’s natural corrosion resistance combined with robust insulation materials supports long-lasting operation with minimal maintenance.

Technical Specifications

Installation Tips for Best Performance

Plan Line Routing Before Installation

Measure the run distance ahead of time and choose a smooth routing path to avoid sharp bends that could restrict refrigerant flow.

Protect Insulation at Wall Penetrations

Use protective sleeves or grommets at walls or floor penetrations to preserve insulation integrity and prevent abrasion.

Support Line Set With Proper Clamps

Install HVAC line supports or brackets along the run to minimize vibration, sagging, and insulation compression over time.

Copper Line Set

1/4 + 3/8 Mini split refrigerant line set 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 Copper line set 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 Copper line set 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 This 3/8″ × 7/8″ × 30 ft Line Set

Trusted Quality & Thermal Performance

Constructed with high-purity copper and robust insulation, this line set delivers dependable refrigerant flow and thermal protection for HVAC systems of various capacities.

Installation-Ready for HVAC Professionals & DIYers

Factory insulation and standard sizing streamline installation, saving time for HVAC technicians and experienced installers alike.

Suitable for a Wide Range of HVAC Projects

Whether for residential homes, apartments, light commercial buildings, or heat pump systems, this line set offers performance flexibility and reliability.

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.