Ejectors - This device, sometimes also known as a siphon or jet pump, is used to fill the engine's reservoir by means of a venturi, much like an injector. A jet of steam entrains the air within the suction hose, creating a vacuum that can lift the water several feet. Since the reservoir is merely at atmospheric pressure, the ejector does not need to be as carefully balanced as an injector. Assuming no air leaks in the hose, one merely turns on the steam, waits for the water to rise to the fitting, and then turn the steam back down as far as possible, to avoid heating the water too much.
    The ejector is a fairly fast, quiet method of water transfer - Case tells of a test in which an ejector with a 2" suction line and a ½" steam line lifted water five feet at 70 gallons a minute, heating it ten degrees F.
    The hose needs to be built for suction, so the that vacuum does not simply collapse the hose. The original hoses were a hard rubber tube inside a woven canvas jacket and may be hard to duplicate today. A strainer needs to be attached to the end, to prevent chunks of debris and small critters from being sucked into the tank if you're siphoning out of a natural body of water. Engines that routinely draft water from natural bodies need to have their tanks cleaned regularly to get rid of sediment.