MRCOOL Lineset for DIY 9K, 12K & 18K Indoor – R454B

The MRCOOL® Quick Connect® line sets are one of the most important components of the DIY® Ductless Mini-Split Systems, because they’re what makes the system do-it-yourself. Without these line sets, you would need to hire an HVAC technician to route, connect, braze, and charge the line set, which makes getting a new HVAC system much more expensive than just the initial purchase. Throughout our initial development and continued use of these DIY® Quick Connect line sets, these line sets have proven to be extremely reliable. They have even earned a patent for their significance, ease of use, and importance in the MRCOOL® DIY® Ductless Mini-Split’s installation.