Which component is NOT considered part of a flushometer?

The spud is a part of the fixture that connects the flushometer to the bowl of the toilet or urinal, not a component of the flushometer itself. A flushometer is primarily made up of the actuator, flush valve, and control stop, which all work together to regulate the flow of water during a flush. The actuator is responsible for initiating the flushing action, the flush valve controls the release of the water, and the control stop is used to shut off the water supply to the flushometer if needed. Therefore, while the spud is crucial for the overall installation and functionality of the toilet or urinal, it does not belong to the flushometer assembly.