MRCOOL DIY® 5th Gen 16 ft. 1/4" x 3/8" Pre-Charged Quick Connect Line Set (for 6K - 9K - 12K Indoor Units)

The MRCOOL DIY® 5th Generation 16 ft. Pre-Charged Line Set is specifically engineered for use with 6,000 - 9,000 - 12,000 BTU MRCOOL DIY indoor air handlers. Featuring 1/4" liquid and 3/8" suction lines, this compact line set comes factory pre-charged with eco-friendly R-454B refrigerant and is sealed with MRCOOL’s patented Quick Connect fittings for a true plug-and-play HVAC installation — no special tools, gauges, or certifications required.

This 16 ft. line set is the ideal solution for short-distance installations where the outdoor condenser is located close to the indoor unit. It’s compatible with both single-zone and multi-zone 5th Gen MRCOOL DIY systems that support 6K heads.

Key Features

• Line Set Length: 16 feet
• Line Sizes: 1/4" liquid x 3/8" suction – optimized for 6K - 9K - 12K mini split indoor units
• Refrigerant: Pre-charged with R-454B for fast and eco-conscious setup
• Quick Connect System: MRCOOL's tool-free connection design ensures fast, leak-free installation
• Durability: UV-resistant white sleeve with rugged copper lines for long-term reliability
• System Compatibility:
  • MRCOOL DIY® 5th Gen 9K - 12K single-zone systems
  • MRCOOL Multi-Zone Condensers: Multi3-18K, Multi4-27K, Multi5-36K, Multi6-48K, Multi6-55K (Line set must match indoor unit size)

Installation Notes

• Designed for short-run installations; great for tight spaces or wall-mounted outdoor units
• If total line set length exceeds 25 ft., use couplers and extended Pro Cable (sold separately)
• Always follow MRCOOL installation guidelines and torque specifications for best results and warranty compliance

Order with confidence from MRCOOL DIY Direct — the nation’s most trusted source for MRCOOL mini split systems, pre-charged line sets, and DIY HVAC solutions. Fast shipping, expert support, and real HVAC help when you need it.