The MRCOOL NV50-3834-O No-Vac Pre-Charged Line Set is a factory-charged refrigerant connection assembly designed to simplify HVAC installation. It connects compatible indoor and outdoor units, allowing refrigerant to circulate between the system components without requiring traditional vacuum procedures when used as specified by the manufacturer. This line set is intended for compatib... https://www.partshnc.com/mrcool-nv50-3834-o-50-ft-pre-charged-no-vac-line-set