Filling device and cap for underwater drainage device

摘要

A method and apparatus for filling an underwater drainage device is provided with a rotatable funnel and cap which is positioned between the manometer chamber and water seal chamber in a pleural drainage device. In use the cap may be removed and the funnel positioned to fill the manometer chamber to the desired level and the funnel may then be rotated to fill the underwater seal chamber to the desired level. A positive pressure relief valve is provided in the cap.