MRCOOL® Copper Insulated HVAC Line Set – 3/8" x 3/4" - 25ft, 35ft, 50ft- For MRCOOL HyperHeat, VersaPro, Universal & Pro-Direct- Professional Installation

Product Description 

This Copper Insulated HVAC Line Set (3/8" × 3/4") is a professional-grade refrigerant line set designed for traditional, non-DIY central ducted HVAC installations. Built for reliability in the field, it is ideal for system replacements, upgrades, and new professional installs where properly sized copper tubing is critical to system performance and longevity.

 

Unlike DIY quick-connect systems, this line set is not factory flared and is intended for licensed HVAC technicians who will braze or flare the connections on-site based on the specific requirements of the installation. The copper tubing is fully insulated, helping prevent condensation, reduce thermal loss, and maintain optimal refrigerant temperatures throughout the system.

 

This line set is fully compatible with MRCOOL ducted split systems, including HyperHeat™, VersaPro®, Universal Series, and Pro-Direct, and it also works with any major HVAC brand that uses 3/8" liquid and 3/4" suction line sizing.

 

Designed to support multiple refrigerants, including R410A, R22, R32, and R454B, this line set is future-ready and field-flexible—making it an excellent choice for both modern high-efficiency systems and legacy equipment.

 

Available in 25 ft, 35 ft, and 50 ft lengths, installers can select the exact run length needed to minimize waste, pressure drop, and refrigerant imbalance.

  

KEY FEATURES & BENEFITS 

• Professional-Grade Copper Line Set – Built for traditional HVAC installations
• 3/8" Liquid × 3/4" Suction Lines – Standard sizing for central ducted systems
• Fully Insulated Tubing – Reduces condensation and thermal loss
• Multi-Refrigerant Compatible – R410A, R22, R32, R454B
• Available Lengths: 25 ft, 35 ft, or 50 ft
• MRCOOL & Universal Brand Compatible – Works with most major HVAC systems
• Ideal for Replacements & New Installs – Field-ready copper tubing

IMPORTANT INSTALLATION NOTICE (NON-DIY)

NOT A DIY LINE SET

• Not factory flared
• Requires on-site brazing or flaring
• Refrigerant charging required
• Installation must be performed by a licensed HVAC professional

 

TECHNICAL SPECIFICATIONS

• Product Type: Copper Insulated HVAC Line Set
• Application: Central ducted split systems
• Installation Type: Professional / Non-DIY

LINE SET CONFIGURATION

• Liquid Line Size: 3/8"
• Suction Line Size: 3/4"
• Available Lengths:
  
• 25 ft
• 35 ft
• 50 ft
• Fitting Type: Field-flared or brazed (installer-dependent)

REFRIGERANT COMPATIBILITY

• R410A
• R22
• R32
• R454B

SYSTEM COMPATIBILITY

MRCOOL Central Ducted Systems

• MRCOOL HyperHeat™ (ducted)
• MRCOOL VersaPro®
• MRCOOL Universal Series
• MRCOOL Pro-Direct

Other Brands

• Compatible with any HVAC brand using 3/8" × 3/4" line sizing

 

FREQUENTLY ASKED QUESTIONS 

Q: Is this line set compatible with MRCOOL ducted systems?

A: Yes. It works with MRCOOL HyperHeat, VersaPro, Universal, and Pro-Direct ducted systems.

 

Q: Is this a DIY quick-connect line set?

A: No. This is a professional, non-DIY line set requiring brazing or flaring.

 

Q: Does this line set come insulated?

A: Yes. Both liquid and suction lines are fully insulated.

 

Q: What refrigerants can this line set be used with?

A: R410A, R22, R32, and R454B.

 

 

Why Buy From MRCOOL DIRECT?

When you order from MRCOOL Direct, you get:

• ✅ Authorized MRCOOL® dealer – Your warranty is protected
• ✅ Factory-fresh units – No refurbished or mystery sources
• ✅ Fast U.S. shipping – Most in-stock items ship in 1–3 business days
• ✅ Financing options – Make high-efficiency comfort more affordable
• ✅ Real product support – Help with sizing, line set selection, and DIY questions
• ✅ No third-party marketplace middlemen – Just genuine MRCOOL® systems from a trusted MRCOOL® dealer.

BUY DIRECT!

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615-553-8118

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