Abstract: An apparatus and method for simultaneously testing the permeability of a plurality of core specimens is disclosed. The apparatus includes a reservoir to contain a fluid and a plurality of permeameters in fluid communication with the reservoir. The apparatus also includes valves for individually controlling the supply of fluid to the permeameters and a buret and flask for measuring the amount of fluid passing individually through each core specimen in each permeameter. The apparatus also includes a pressurized gas source for pressurizing the fluid in the reservoir with gas and a pressure regulator to allow multiple permeability tests to be conducted simultaneously but at a different pressure than other concurrent permeability tests.