1LB Apollo Top Fill Closed Loop Extractor1LB Top Fill Closed Loop Extraction System (System comes with 1 yr. limited warranty) The 1lb closed loop hydrocarbon extractor performs incredible botanical extraction within a sealed, vacuumed system. With the help of a top fill input, solvent washes through the material column, collecting oils as it passes over the material. The oil bearing solvent is collected in the collection base under the material column. Once collected, the solvent is