Abstract: A bulk cooking oil system has filter, waste, supply, and fryer stations connected by piping for movement of oil along preselected pipe paths. The filter station functions to filter cooking oil from the fryer station and has a valve adapted to open and close pipe lines that lead to and away from the filter station. The waste station stores used oil and has a valve adapted to open and close a pipe line leading to and away from the waste station. The supply station stores oil to be used at the fryer station for cooking food products and also has a valve adapted to open and close a pipe line leading to and away from the supply station. The fryer station has a fryer that receives and heats the cooking oil to cook food products and a valve adapted to open and close a pipe line leading to and away from the fryer station. All of the various valves are selectively operated and controlled so that a predetermined pipe path can be established between identified stations. A pump moves the oil along the selected pipe path.