The MRCOOL GCNV-VD00-3834 GeoCool No-Vac Geothermal Pre-Charged Lineset is a factory-prepared refrigerant piping assembly with 3/8-inch liquid and 3/4-inch suction lines for compatible geothermal heat pump systems. It provides a sealed path for refrigerant between the indoor and outdoor components, supporting efficient heat transfer during heating and cooling operation. Designed for G... https://www.partshnc.com/mrcool-geocool-no-vac-vertical-downflow-3-8-3-4-pre-charged-lineset-gcnv-vd00-3834