The MrCool Do-It-Yourself (DIY Mini Split) is an absolute game changer! The precharged linsets are the biggest difference in the do-it-yourself and the traditional flarenut lineset. However, did you know The HVAC Outlet has a product that helps make every mini split a do-it-yourself mini split. This product bypasses the need for a vacuum pump, and in essence, makes the unit pull a vacuum on itself. Are you curious now? If so, give us a call (859) 209 1112.