MRCOOL GCIK-CL4T-AM GeoCool Inverter Series 4 Ton Closed Loop Installation Kit with Angled Manifold is a geothermal system accessory designed to simplify the installation of compatible GeoCool heat pump systems. It works by providing the necessary closed-loop connection components and an angled manifold to circulate heat transfer fluid efficiently between the ground loop and the geoth... https://www.partshnc.com/mrcool-geocool-inverter-series-4-ton-closed-loop-geothermal-installation-kit-with-angled-manifold-gcik-cl4t-am