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I'm not aware of any feedwater heater system supplied by an injector rather than a feedwater pump. I can say with confidence that a single feedwater line would not be equipped with both an injector and a feedwater pump. A couple other points: Whether an injector is of the lifting or nonlifting variety is easily determined by the hight at which it is located on the locomotive. If it's below the level of the floor of the water tank of the tender, it's nonlifting. Water is delivered to a nonlifting injector by gravity. A lifting injector is located above the level of the bottom of the water tank, and is fed by inducing a vacuum in the water supply line (this happens within the injector). Lifting injectors usually are located in front of or within the cab for ease of operation of the valves. (The Bachman 2-8-0 has lifting injectors on each side, ahead of the cab.) All steam locomotives require two independent means of inducing water into the boiler. Two injectors can be used, or one injector and one feedwater pump. When two injector-fed lines are used, one is usually located on the fireman's side, the other on the engineer's side of the boiler. As Mr. Drury noted, when a feedwater pump is used it generally is located on the fireman's side of the boiler. The reason behind this practice is that the fireman is responsible for operation of the principal means of inducing water into the boiler. The line connected to the feedwater heater will be the preferred feedwater line, so it makes sense to locate the feedwater pump on the fireman's side. I have looked through my photos of CN steam power operating in the 1950s. All those equipped with Elesco feedwater heaters had water supplied by feedwater pumps located on the fireman's side. The secondary source of feedwater was an injector-driven line located on the engineer's side (both lifting and nonlifting injectors were utilized there). In each case, the supply lines were fed into the boiler through a top-mounted check valve. --John
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