164 ft 3/8" x 5/8" Mini Split Long Line Set Sizes

164 Ft 3/8" x 5/8" Mini Split Long Line Set

DABUND 164 ft 3/8" x 5/8" Mini Split Long Line Set is a pre-insulated twin copper refrigerant piping solution for compatible ductless mini split air conditioners, heat pumps and split HVAC systems requiring an extended piping route.

The paired copper tubing includes a 3/8" tube and a 5/8" tube, equivalent to approximately 9.52 mm and 15.88 mm outside diameter. The continuous coil length is 164 ft, approximately 50 m.

On compatible HVAC equipment, the 3/8" tube commonly functions as the liquid refrigerant line while the 5/8" tube functions as the suction or gas return line. Exact refrigerant piping dimensions must be verified against the installation specifications for the specific indoor and outdoor equipment combination.

High-purity copper tubing is available to ASTM B280 and C12200 DHP specifications according to the ordered configuration. The displayed product uses White PE insulation designed to provide thermal protection, moisture resistance and mechanical protection around the copper tubing.

Quick Answer: This product is a 164 ft / approximately 50 m mini split long line set containing 3/8" and 5/8" pre-insulated copper tubing, approximately 9.52 mm and 15.88 mm OD, with White PE insulation for compatible extended-run HVAC installations.

Long-Line Compatibility Notice: A 164 ft refrigerant run is not suitable for every mini split or heat pump. Confirm maximum actual piping length, equivalent piping length, vertical separation, required refrigerant pipe size, additional refrigerant charge and any manufacturer-specified long-line requirements before installation.

164 Ft 3/8" x 5/8" Long Line Set Specifications

Key Features of the 164 Ft Mini Split Long Line Set

3/8" Liquid Line and 5/8" Suction Line

On compatible HVAC systems, the smaller 3/8" copper tube commonly serves as the liquid refrigerant line while the larger 5/8" tube serves as the suction or gas return line.

Their approximate outside diameters are 9.52 mm and 15.88 mm. Refrigerant piping requirements vary between manufacturers and models, so both dimensions should be verified before ordering.

164 Ft / 50 m Continuous Refrigerant Piping

The 164 ft coil is approximately 50 m long, providing a continuous refrigerant piping option for compatible HVAC projects requiring substantially more routing distance than common 25 ft, 50 ft, 75 ft or 100 ft line sets.

Where permitted by the equipment manufacturer, a continuous 50 m coil can reduce intermediate copper joints compared with joining several shorter refrigerant piping sections.

C12200 DHP Copper Tubing

High-purity copper provides good formability, thermal conductivity and corrosion resistance for professional HVAC refrigerant piping applications.

ASTM B280 and C12200 DHP specifications are available according to the ordered configuration. Buyers requiring a specific tube wall thickness or pressure performance should confirm the applicable technical data before ordering.

White PE Insulated Copper Tubing

The displayed configuration uses White PE insulation around the copper tubing. The insulation helps reduce heat transfer, limit moisture penetration and protect the tubing during transportation and installation.

Multi-Layer Insulation Construction

The displayed insulation construction includes an embossed PE outer layer, dense-cell foam middle layer and closed-cell inner insulation structure.

OEM Printing and Private Label Supply

Company name, copper tube dimensions, coil length and other product identification can be printed on the insulation for HVAC distributors, wholesalers, importers and private-label brands.

High-Purity Copper

White PE Insulated Pipe

Protective Plastic Caps

White PE Insulation Structure

The White PE insulation system is designed to protect refrigerant copper tubing and provide thermal insulation along extended piping routes.

Insulation Pipe Production

Insulated Pipe Warehouse

Inner Insulation Layer

Embossed PE Outer Layer

The outer layer uses embossed PE film designed to provide surface protection, wear resistance and resistance to outdoor aging conditions.

Dense-Cell Foam Middle Layer

The middle layer uses dense-cell foam designed for thermal insulation, impact absorption and resistance to water penetration.

Closed-Cell Inner Layer

The inner insulation layer uses a closed-cell structure to support thermal insulation and air tightness around the copper tubing. Selected configurations are listed with a temperature range of approximately -40°C to 120°C.

Available Insulation Testing

Available insulation configurations include testing related to ASTM E84, UL 94, ASTM D1056, ASTM G21, ASTM C1427 and UL 723 according to the selected insulation material and specification. Buyers should confirm the applicable documentation for the exact product configuration being ordered.

Why Choose a 164 Ft Mini Split Long Line Set?

A 164 ft mini split long line set is approximately 50 m long and is intended for compatible HVAC projects requiring a substantially extended refrigerant piping route.

The continuous 50 m coil can provide routing flexibility in large buildings, multi-level properties, commercial spaces or installations where indoor and outdoor equipment are separated by a significant distance.

Where permitted by the HVAC equipment manufacturer, a continuous long coil may reduce intermediate piping joints. However, actual line length, equivalent line length and vertical separation must all remain within the equipment manufacturer's limits.

164 Ft Long-Line Installation Considerations

Verify the Required 3/8" x 5/8" Pipe Sizes

Confirm that the exact indoor and outdoor HVAC equipment requires approximately 9.52 mm and 15.88 mm outside-diameter refrigerant tubing. Do not determine refrigerant pipe size only from system capacity.

Confirm the Maximum Actual Piping Length

Verify that the equipment manufacturer permits approximately 164 ft / 50 m of actual refrigerant piping. Many mini split systems have maximum piping limits below this length.

Calculate Equivalent Piping Length

Elbows, bends and other routing conditions can increase equivalent refrigerant piping length beyond the measured physical distance. Follow the manufacturer's equivalent-length calculation method where specified.

Check Maximum Vertical Separation

A 50 m refrigerant piping route may involve significant elevation changes. Confirm the maximum allowable vertical separation between indoor and outdoor equipment for the exact HVAC model.

Confirm Additional Refrigerant Charge

Many HVAC systems include a factory refrigerant charge for only a specified standard piping length. A 164 ft installation may require additional refrigerant according to the equipment manufacturer's charging instructions.

Review Manufacturer Long-Line Requirements

Extended refrigerant runs may have additional installation requirements specified by the HVAC equipment manufacturer. Review the installation manual before planning a 164 ft piping route.

Support Long Horizontal and Vertical Sections

Long refrigerant piping should be properly supported to reduce sagging, vibration and mechanical stress on copper tubing, insulation and field connections.

Protect Insulation at Structural Penetrations

Use suitable sleeves, grommets or other protection where insulated copper tubing passes through walls, floors, roofs or structural openings.

Is 3/8" x 5/8" Compatible With My Mini Split?

The 3/8" x 5/8" refrigerant piping combination is used by selected ductless mini split air conditioners, heat pumps and split HVAC systems.

Some systems in approximately 36,000–48,000 BTU classes may use these dimensions, but this is not a universal sizing rule.

Equipment with similar nominal capacity can require different liquid-line and suction-line sizes. Always verify the exact equipment piping specification before ordering.

Applications of the 164 Ft 3/8" x 5/8" Long Line Set

Extended-Run Mini Split Systems

Suitable for compatible ductless mini split systems that specifically require 3/8" and 5/8" refrigerant tubing and permit an approximately 50 m piping route.

Heat Pump Systems

Can be supplied for compatible heat pump installations requiring this paired copper tube combination and extended refrigerant piping distance.

Multi-Level HVAC Installations

A 164 ft line set can provide routing flexibility in compatible multi-level installations, provided that the manufacturer's vertical-separation and maximum piping-length limits are followed.

Commercial HVAC Projects

The approximately 50 m continuous coil can support compatible commercial installations where equipment layout requires a long refrigerant piping route through large building spaces.

Large Building Routing

The long continuous coil provides additional routing flexibility where refrigerant piping must pass through multiple rooms, ceilings, service shafts or mechanical spaces.

Available Mini Split Line Set Sizes

164 Ft Long Line Set for HVAC Distributors

DABUND supplies pre-insulated mini split line sets to HVAC distributors, wholesalers, importers, contractors, engineering companies, project suppliers and private-label brands.

The 164 ft 3/8" x 5/8" White PE configuration provides an approximately 50 m stocking option for buyers serving compatible long-distance mini split and heat pump installations.

OEM and Custom Mini Split Line Set Supply

DABUND supports OEM and ODM production for HVAC distributors, importers and private-label brands.

• Custom copper tube combinations

• Custom coil lengths

• Multiple insulation thicknesses

• Company name and specification printing

• Private-label packaging

• Custom product identification

• Bulk supply for distributors and project buyers

Why Choose DABUND Mini Split Line Sets?

HVAC Manufacturing Experience Since 2008

DABUND has manufactured HVAC components since 2008, supplying mini split line sets, insulated copper tubing and related HVAC products to international customers.

In-House Insulation Production

Insulation production capabilities support multiple thicknesses, printed identification and customized configurations for distributor and private-label requirements.

Multiple Sizes and Lengths

Multiple copper tube combinations, coil lengths and insulation thicknesses allow buyers to source refrigerant piping configurations according to market and project requirements.

DABUND Factory

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

SGS Testing and Insulation Standards

Available insulation configurations include testing related to ASTM E84, UL 94, ASTM D1056 and ASTM G21 according to the selected insulation material and product specification. Buyers should confirm the applicable documentation for the exact configuration being ordered.

International HVAC Exhibitions

DABUND participates in international HVAC exhibitions to present mini split line sets, insulated copper tubing and related HVAC products to distributors, importers and professional buyers.

Frequently Asked Questions

What is a 164 ft 3/8" x 5/8" mini split long line set?

It is a paired refrigerant piping system containing 3/8" and 5/8" outside-diameter copper tubing with factory-applied insulation. The continuous coil length is approximately 164 ft or 50 m.

What are the metric sizes of 3/8" and 5/8" copper tubing?

A 3/8" copper tube has an outside diameter of approximately 9.52 mm, while a 5/8" copper tube has an outside diameter of approximately 15.88 mm.

Which tube is the liquid line and which is the suction line?

On compatible HVAC systems, the 3/8" tube commonly functions as the liquid line while the 5/8" tube functions as the suction or gas line. Always verify the equipment manufacturer's piping specification.

What HVAC capacity uses a 3/8" x 5/8" line set?

Some systems in approximately 36,000–48,000 BTU classes may use this pipe combination, but this is not universal. Similar-capacity equipment can require different refrigerant pipe dimensions.

Can I select the line set by BTU or tonnage alone?

No. Refrigerant pipe sizing depends on equipment design, refrigerant type, actual piping length, equivalent length, vertical separation and manufacturer specifications.

Why is 164 ft approximately 50 m?

A 164 ft coil is approximately 50 m long, making this configuration suitable for buyers and projects that commonly specify extended refrigerant piping in metric lengths.

Can every mini split use a 164 ft refrigerant line?

No. Many mini split systems do not permit a refrigerant piping run this long. Verify that approximately 164 ft / 50 m falls within the maximum actual and equivalent piping limits of the exact equipment model.

Does a 164 ft line set require additional refrigerant?

It may. Many HVAC systems include a factory refrigerant charge for only a specified standard piping length. Follow the manufacturer's charging instructions to determine the required additional refrigerant.

Does vertical separation matter with a 164 ft piping run?

Yes. Confirm the maximum permitted vertical separation between indoor and outdoor equipment before planning an approximately 50 m refrigerant piping route.

What is equivalent refrigerant piping length?

Actual length is the measured copper tubing route. Equivalent length may also account for bends and other piping conditions according to the equipment manufacturer's calculation method.

What insulation is used on this product?

The displayed product configuration uses White PE multi-layer insulation. The exact insulation structure, thickness and applicable test documentation should be confirmed for the ordered configuration.

What insulation thicknesses are available?

Available insulation thickness options include 8 mm, 9 mm, 10 mm, 13 mm, 19 mm and 25.4 mm depending on the selected configuration.

Is UV-resistant insulation available?

Yes. UV-resistant PE insulation configurations are available according to the selected product specification.

What pressure rating does the copper tubing have?

Allowable working and test pressure depends on copper tube diameter, wall thickness, material specification and ordered configuration. Buyers requiring a specific pressure rating should confirm the applicable technical data before ordering.

Can DABUND customize the mini split long line set?

Yes. OEM and ODM options include copper tube combinations, coil lengths, insulation thickness, printed identification and private-label packaging.

Can I get samples before placing a bulk order?

Yes. According to the current product information, DABUND can provide three sample pieces for evaluation, with the buyer covering express shipping costs. View sample 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 commercial agreement.

What delivery terms are available?

International trade terms can include EXW, FOB, CFR and CIF according to the buyer's logistics requirements.

What is the typical delivery time?

Current product information lists typical delivery at approximately 15–20 days. Actual lead time depends on order quantity, product specification, customization and production schedule.

Who should install a 164 ft mini split long line set?

Refrigerant piping, flare or brazed connections, pressure testing, evacuation, refrigerant charging and long-line setup should be completed by qualified HVAC personnel according to local requirements and the equipment manufacturer's instructions.