MRCOOL GCNV-VU00-3834 GeoCool No-Vac Vertical Upflow Line Set is a pre-charged refrigerant line set designed for efficient installation of compatible HVAC systems. Featuring 3/8-inch and 3/4-inch copper lines, it connects indoor and outdoor equipment to facilitate refrigerant flow between system components. The no-vac design helps simplify installation by reducing the need for field e... https://www.partshnc.com/mrcool-geocool-no-vac-vertical-upflow-pre-charged-line-set-gcnv-vu00-3834