Mechanism, which can include systems, methods, and media, for generating an alert of a water hammer event in a steam pipe are provided, the mechanisms comprising: sampling an accelerometer coupled to a steam pipe to provide accelerometer data; determining that the accelerometer data meets or exceeds a threshold; and generating an alert that a water hammer event has occurred based at least in part on the accelerometer data. In some of the mechanisms, the sampling of the accelerometer is performed for a given period of time, and the mechanisms further comprise sampling an ultrasonic sensor for the given period of time to provide ultrasonic sensor data, and wherein the generating the alert is based at least in part on the accelerometer data and the ultrasonic sensor data.