The Emerson Flow Control (Alco) 043734 Bi-Directional Flow Drier 5/8" ODF BFK-165S is a high-performance HVAC refrigeration component designed to protect heat pump and reversible refrigeration systems. It works by removing moisture, acids, and solid contaminants from the refrigerant while allowing efficient flow in both directions, ensuring reliable operation during heating and coolin... https://www.partshnc.com/043734-emerson-flow-control-alco-58-odf-bi-flowdrier-bfk-165s