35 ft 1/2″ × 3/4″ Mini Split Line Set – Pre-Insulated HVAC Refrigerant Tubing

35 ft 1/2" x 3/4" Mini Split Line Set

The 35 ft 1/2" x 3/4" mini split line set is a pre-insulated HVAC refrigerant tubing solution designed for mini split air conditioners, ductless AC systems, heat pumps and light commercial HVAC installations.

This line set includes 1/2" and 3/4" copper tubing with factory-applied black rubber insulation. It helps connect indoor and outdoor HVAC units while reducing heat transfer, condensation risk and installation time.

The 1/2" x 3/4" configuration is commonly used for larger split air conditioning systems. Final line size, line length and refrigerant requirements should always follow the HVAC equipment manufacturer’s installation manual.

Product Overview: HVAC-Ready Refrigerant Line Set

The 35 ft 1/2" x 3/4" mini split line set provides a factory-insulated copper tubing solution for HVAC refrigerant connections. It is suitable for residential HVAC, ductless heat pump systems and light commercial split AC installations.

Factory insulation helps maintain refrigerant temperature over the line run, reducing energy loss and protecting nearby walls, ceilings and building surfaces from moisture caused by condensation.

Key Features of 35 ft 1/2" x 3/4" Mini Split Line Set

• 35 ft pre-insulated HVAC refrigerant line set for mini split and ductless AC systems.

• 1/2" and 3/4" copper tubing for compatible higher-capacity HVAC systems.

• Factory-applied black rubber insulation helps reduce heat gain, heat loss and condensation.

• Made with 99.9% pure copper for stable refrigerant flow and long-term performance.

• Designed for indoor-to-outdoor HVAC unit connections.

• Suitable for residential, apartment, office and light commercial HVAC projects.

• Compatible with common refrigerants such as R410A and R32 when installed correctly.

• UV-resistant and weather-durable insulation supports outdoor refrigerant runs.

• Available in multiple line set sizes, lengths and insulation thickness options.

• OEM logo printing, custom packaging and bulk supply are available for distributors.

Pre-Insulated Line Set for Thermal Efficiency

Pre-insulated copper tubing helps preserve refrigerant temperature during cooling and heating operation. Compared with field-wrapped tubing, factory-applied insulation delivers more consistent coverage and reduces installation labor.

• Factory-applied insulation saves installation time compared with field wrapping.

• Maintains consistent refrigerant temperature over moderate line runs.

• Reduces heat gain, heat loss and condensation risk.

• Protects tubing during indoor and outdoor installation.

• Supports better HVAC system efficiency and service life.

Standard 1/2" x 3/4" Line Sizes

This line set uses a 1/2" copper line and a 3/4" copper line for compatible mini split and split AC systems. It is commonly selected for larger HVAC applications that require greater refrigerant flow capacity.

1/2" Copper Line

The 1/2" copper line is used in compatible HVAC systems according to equipment design and installation requirements.

3/4" Copper Line

The 3/4" copper line is used as the larger refrigerant line in compatible systems, supporting return flow and stable operation in higher-capacity installations.

Key Benefits for HVAC Installation

Enhanced Energy Efficiency

Pre-insulated lines help preserve refrigerant temperature, supporting cooling and heating performance while reducing unnecessary energy loss along the line set.

Condensation Prevention and Moisture Control

Insulated tubing reduces surface condensation and dripping, helping protect walls, ceilings, insulation materials and surrounding building surfaces from moisture damage.

Faster and Easier Installation

Factory insulation eliminates most on-site insulation wrapping work, helping HVAC technicians save labor time and maintain consistent insulation quality across the full line run.

99.9% Pure Copper

Black Rubber Insulated Pipe

Plastic Cap Protection

Features of Black Rubber Pipe Insulation

Black rubber pipe insulation is designed for HVAC refrigerant line protection. It supports thermal insulation, moisture resistance and condensation control for mini split and ductless HVAC applications.

• Temperature range from -40℃ to 120℃.

• Helps improve moisture condensation protection.

• Insulation material works as both insulation layer and moisture-proof layer.

• No additional water vapor barrier is required in many standard installations.

• Suitable for outdoor and indoor HVAC refrigerant line runs.

HVAC Compatibility and Applications

Works with Mini Split and Ductless HVAC Systems

This line set is suitable for mini split air conditioners, ductless heat pumps, residential HVAC installations and light commercial HVAC projects that match the 35 ft line length and 1/2" x 3/4" diameter configuration.

• Mini split air conditioners.

• Ductless heat pumps.

• Residential HVAC installations.

• Apartment and office HVAC systems.

• Light commercial HVAC projects.

• Replacement and retrofit refrigerant line applications.

Compatible with Common Refrigerants

This pre-insulated HVAC line set is designed for use with common modern refrigerants such as R410A, R32 and similar refrigerants when installed according to system specifications and local code requirements.

Technical Specifications

Installation Tips for Best Performance

Plan the Line Path Before Installation

Measure the distance between indoor and outdoor units before installation. Plan the routing path to avoid tight bends, obstruction points or sharp turns that may affect refrigerant flow or insulation integrity.

Protect Insulation at Wall Pass-Throughs

Use a wall sleeve or protective grommet where the line set passes through walls to prevent insulation wear, compression or damage.

Secure Tubing with Clips or Brackets

Use proper supports along the run to prevent sagging, reduce vibration and protect the insulation when exposed to wind, movement or mechanical stress.

Follow HVAC Equipment Requirements

Always follow the HVAC equipment manufacturer’s specifications for line size, maximum line length, flare connection, torque value and refrigerant charge.

Mini Split Line Set Size Options

Recommended Applications by AC Capacity

The 1/2" x 3/4" line set is commonly used for larger split AC installations. For exact AC capacity matching, confirm the line size with the system manufacturer before purchase or installation.

Why Choose This 35 ft Mini Split Line Set?

Reliable Performance and Quality Construction

Constructed with 99.9% pure copper and high-quality factory insulation, this line set supports stable HVAC performance, refrigerant flow and long-term service life.

Suitable for Professional and Experienced Installers

The pre-insulated design provides ease of use, dependable performance and faster installation times for HVAC technicians and experienced installers.

Residential and Light Commercial HVAC Projects

This 35 ft line set is suitable for home systems, apartments, offices and light commercial spaces that require a durable and efficient line set between indoor and outdoor units.

Dabund Factory

Dabund produces insulated copper pipe, mini split line set, aluminum pipe and HVAC parts for global customers.

SGS Certificate

Mini split line set insulation can be made of polypropylene or black rubber with UV resistance, meeting ASTM E84, UL94, ASTM D1056 and ASTM G21 requirements.

Exhibition

Dabund joins HVAC exhibitions worldwide to present mini split line set and HVAC installation products to customers face to face.

FAQ

What does 1/2" x 3/4" mean in this line set?

It refers to the outer diameters of the copper refrigerant lines. This product includes one 1/2" copper line and one 3/4" copper line for compatible HVAC systems.

What is this 35 ft mini split line set used for?

It is used to connect indoor and outdoor units in mini split air conditioners, ductless AC systems, heat pumps and light commercial HVAC systems.

Do I need extra insulation on site?

In most standard installations, extra insulation wrapping is not required because this product comes with factory-applied insulation.

Is this line set suitable for outdoor use?

Yes. The insulation is designed for UV resistance and weather durability, making the line set suitable for outdoor refrigerant runs when installed correctly.

Is this compatible with R410A and R32 refrigerants?

Yes. This line set supports common HVAC refrigerants such as R410A and R32 when installed according to system specifications and local HVAC code requirements.

Can this line set be shortened during installation?

Yes. The copper tubing can be cut to the required length, but proper cutting, deburring, flaring and sealing must be performed to maintain system integrity.

What insulation material is used?

This product uses factory-applied black rubber insulation. Other insulation options and thicknesses may be available for OEM and bulk orders.

Can Dabund provide other sizes and lengths?

Yes. Dabund can provide multiple mini split line set sizes and lengths, including 15 m, 20 m, 25 m, 30 m and 50 m, with different insulation thickness options.

Are you a trading company or manufacturer?

Dabund is a manufacturer of mini split line sets, insulated copper pipe, aluminum pipe and HVAC parts.

Can I get a free sample?

Yes. Dabund can provide qualified customers with 3 pieces of free samples. Express cost may need to be covered by the buyer. You can request samples through the free sample page.

Can I print my logo?

Yes. Dabund accepts OEM and ODM orders, including logo printing, brand marking and customized packaging.

What payment terms are available?

Payment terms may include T/T, L/C at sight, credit card and other agreed payment methods depending on order details.

What delivery terms can you offer?

Dabund can offer common international trade terms such as EXW, FOB, CFR and CIF.

How long is your delivery time?

Normal delivery time is usually 15 to 20 days. For urgent orders, production and shipment can be arranged in advance according to factory schedule.