75 ft 1/4" x 5/8" Pre Insulated Copper Tubing

75 Ft 1/4" x 5/8" Pre-Insulated Copper Tubing

DABUND 75 ft 1/4" x 5/8" pre-insulated copper tubing is a long-length HVAC refrigerant line set designed for compatible mini split air conditioners, heat pumps, split AC systems and refrigeration applications. The paired copper tubing combines a 1/4" line and a 5/8" line with factory-applied insulation for faster HVAC installation and simplified material sourcing.

The 75 ft coil provides approximately 22.86 m of continuous insulated copper tubing, making it suitable for projects where indoor and outdoor HVAC units require longer refrigerant piping routes. The copper tubes are manufactured from C12200 DHP copper for air-conditioning and refrigeration applications, with ASTM B280 specifications available according to the ordered configuration.

White PE insulation is available in multiple thicknesses and is designed to provide thermal insulation, condensation control and protection for the copper tubing. DABUND also supports customized insulation printing, tube dimensions, coil lengths and OEM packaging for HVAC distributors, wholesalers and private-label brands.

Quick Answer: This product is a 75 ft / 22.86 m pre-insulated HVAC copper line set with 1/4" and 5/8" outside-diameter copper tubes, equivalent to approximately 6.35 mm and 15.88 mm.

Compatibility Notice: Refrigerant pipe dimensions and maximum line length vary by HVAC manufacturer and model. Always confirm that the equipment requires 1/4" and 5/8" tubing and supports a 75 ft refrigerant run before installation.

75 Ft Pre-Insulated Copper Tubing Specifications

Key Features of the 1/4" x 5/8" Copper Line Set

C12200 Copper for HVAC and Refrigeration

DABUND uses C12200 DHP copper tubing for air-conditioning and refrigeration applications. The material provides the formability, corrosion resistance and thermal performance required for professional HVAC refrigerant piping.

1/4" x 5/8" Paired Copper Tubing

The paired line set contains 1/4" and 5/8" outside-diameter copper tubes. These correspond to approximately 6.35 mm and 15.88 mm in metric dimensions. Their liquid-line and suction-line functions must match the specific HVAC equipment.

75 Ft Continuous Long Line Set

The approximately 22.86 m continuous coil is designed for HVAC installations requiring longer routing between indoor and outdoor equipment. A continuous long line can reduce the need for unnecessary intermediate joints when the equipment manufacturer permits the required piping distance.

Factory-Applied White PE Insulation

The copper tubing is supplied with factory-applied insulation, reducing on-site insulation work and helping maintain consistent coverage along the refrigerant piping.

Multiple Insulation Thickness Options

DABUND can provide multiple insulation thicknesses including 8 mm, 9 mm, 10 mm, 13 mm, 19 mm and 25.4 mm according to product configuration and market requirements.

OEM Printing for HVAC Brands

Because DABUND manufactures the insulation in-house according to the original product information, insulation can be customized with company name, tube size, length and other product markings for OEM and private-label orders.

High-Purity Copper Tubing

White PE Insulated Pipe

Protective Plastic Cap

Three-Layer PE Insulation Structure

The white PE insulation uses a multilayer structure designed to provide thermal protection, moisture resistance and mechanical protection for the copper refrigerant tubing.

Insulation Tubing Production

Insulated Pipe Warehouse

Closed-Cell Inner Layer

Outer Protective PE Layer

The embossed outer PE layer is designed to provide wear resistance and protect the underlying insulation during handling, transportation and HVAC installation. UV-resistant material options are available according to specification.

Middle IXPE Foam Layer

The middle foam layer uses a dense closed-cell structure that helps reduce heat transfer, resist moisture penetration and absorb impact around the copper tubing.

Closed-Cell Inner Insulation Layer

The inner insulation layer helps maintain thermal performance around the copper pipe and reduce condensation when the correct insulation thickness is selected and properly installed.

HVAC Insulation Performance

• Closed-cell construction helps reduce moisture penetration.

• Low thermal conductivity helps reduce heat transfer.

• Factory-applied insulation helps provide consistent coverage.

• UV-resistant insulation options are available.

• Selected insulation specifications support operating temperatures from approximately -40°C to 120°C.

• Multiple insulation thicknesses are available for different climates and applications.

Available insulation specifications include testing related to ASTM E84, UL 94, ASTM D1056 and ASTM G21 according to the original product information. Buyers should confirm the specific test report and required compliance documents before ordering.

When Should You Choose a 75 Ft HVAC Line Set?

A 75 ft pre-insulated copper line set is intended for installations where the distance between the indoor and outdoor HVAC equipment is substantially greater than standard short-line applications. Typical routing may need to pass through multiple floors, equipment rooms, ceilings or long exterior paths before reaching the outdoor unit.

Compared with shorter 25 ft or 50 ft line sets, a 75 ft continuous coil provides additional installation flexibility and may reduce the need for intermediate copper joints when a long uninterrupted route is required.

However, longer piping does not mean that every HVAC system can use a 75 ft line set. Maximum equivalent length, vertical lift, number of bends and additional refrigerant requirements vary significantly by equipment manufacturer.

Before purchasing, check the installation manual and confirm that the selected HVAC unit permits approximately 75 ft / 22.86 m of refrigerant piping.

Pre-Insulated Copper Tubing for HVAC Wholesalers

DABUND supplies pre-insulated copper tubing for HVAC distributors, refrigeration wholesalers, importers, contractors, project suppliers and private-label brands. Long-length coils are particularly useful for distributors serving commercial projects and installations that require flexible piping lengths.

OEM and ODM services can include custom copper tube dimensions, coil lengths, insulation thicknesses, insulation printing, product markings, packaging and private-label branding.

Available Pre-Insulated Copper Tubing Sizes

DABUND manufactures multiple paired copper tube sizes, insulation thicknesses and coil lengths for HVAC and refrigeration applications.

Is 1/4" x 5/8" Copper Tubing Compatible With My HVAC System?

A 1/4" x 5/8" copper line set is used by certain split air conditioners, ductless mini splits and heat pump systems, but refrigerant line size cannot be selected based on BTU rating alone.

The 1/4" tube has an outside diameter of approximately 6.35 mm and the 5/8" tube approximately 15.88 mm. Confirm that these exact dimensions are specified by the HVAC equipment manufacturer.

Also check the maximum actual and equivalent line length, allowable vertical separation, refrigerant type, insulation thickness and additional refrigerant charge. Long refrigerant runs may require different charging procedures than standard factory line lengths.

Refrigerant piping, pressure testing, evacuation, brazing, flaring and refrigerant charging should be performed by qualified HVAC personnel according to applicable regulations and equipment manufacturer instructions.

OEM Pre-Insulated Copper Tubing Manufacturer

DABUND has manufactured insulated copper pipes, copper line sets and HVAC accessories since 2008. The company supplies pre-insulated copper tubing to international HVAC distributors, wholesalers, importers, contractors and private-label brands.

Available OEM and ODM services include:

• Customized copper tube sizes

• Customized coil lengths

• Customized insulation thickness

• Company name and specification printing

• Customized insulation color and configuration

• Private-label cartons and export packaging

• Bulk production for distributors and wholesalers

Why Choose DABUND Pre-Insulated Copper Tubing?

• HVAC copper tubing manufacturing experience since 2008

• C12200 DHP copper for air-conditioning and refrigeration applications

• ASTM B280 tubing specifications available

• Factory-applied insulation

• Multiple paired copper tube sizes

• Multiple coil lengths and insulation thicknesses

• OEM insulation printing and private-label services

• Bulk supply for HVAC distributors and wholesalers

DABUND Factory

DABUND manufactures insulated copper pipes, mini split line sets, aluminum pipes and HVAC components for international B2B customers.

SGS Testing and Insulation Standards

Available insulation specifications include testing related to ASTM E84, UL 94, ASTM D1056 and ASTM G21. Buyers should confirm the exact product specification and applicable test documentation for their destination market before placing an order.

International HVAC Exhibitions

DABUND participates in international exhibitions to present pre-insulated copper tubing, mini split line sets and HVAC accessories to distributors, contractors, importers and other industry buyers.

Frequently Asked Questions

What is 75 ft 1/4" x 5/8" pre-insulated copper tubing?

It is a paired HVAC refrigerant line set containing 1/4" and 5/8" copper tubes with factory-applied insulation. The total coil length is approximately 75 ft or 22.86 m.

What are the metric sizes of 1/4" and 5/8" copper tubing?

A 1/4" tube has an outside diameter of approximately 6.35 mm, while a 5/8" tube has an outside diameter of approximately 15.88 mm.

How long is a 75 ft HVAC line set in meters?

75 ft is approximately 22.86 meters.

Why choose a 75 ft line set instead of a 25 ft or 50 ft line set?

A 75 ft line set provides additional routing distance for installations where indoor and outdoor HVAC equipment are positioned farther apart. It can also reduce the need for intermediate copper joints when a continuous long run is permitted by the equipment manufacturer.

Can every mini split use a 75 ft refrigerant line?

No. Maximum refrigerant line length varies by HVAC manufacturer and model. Check the equipment installation manual before ordering or installing a 75 ft line set.

Is 1/4" x 5/8" suitable for every 24,000 or 30,000 BTU system?

No. Some systems in these capacity ranges may use 1/4" x 5/8" tubing, but refrigerant line dimensions vary by manufacturer and model. Always verify the required tube sizes in the equipment installation manual.

What copper material does DABUND use?

DABUND uses C12200 DHP copper for air-conditioning and refrigeration applications, with ASTM B280 tubing specifications available according to the ordered configuration.

What insulation thicknesses are available?

Available white PE insulation thicknesses include 8 mm, 9 mm, 10 mm, 13 mm, 19 mm and 25.4 mm depending on the required product specification.

Can DABUND print my company name on the insulation?

Yes. OEM printing can include the company name, copper tube size, coil length and other product information according to customer requirements.

Can DABUND customize other copper tube sizes and lengths?

Yes. DABUND supplies multiple tube combinations including 1/4" + 3/8", 1/4" + 1/2", 1/4" + 5/8", 3/8" + 5/8", 3/8" + 3/4", 1/2" + 3/4" and 3/8" + 7/8", with multiple coil lengths available.

Can I get samples before placing a bulk order?

Yes. DABUND provides sample support for product evaluation. You can visit the free sample page for additional information.

What payment terms are available?

Available payment methods can include T/T, L/C at sight and credit card. Final payment terms depend on the order and commercial agreement.

What delivery terms are available?

Available international trade terms can include EXW, FOB, CFR and CIF. Buyers can confirm the required Incoterm when requesting a quotation.

What is the typical production lead time?

Standard production lead time is typically around 15–20 days according to the current product information. Actual lead time depends on order quantity, customization requirements, material availability and production schedule.