Water hammer is one of the unsteady flows in urban water distribution networks. which has been of great importance due to the damage caused to the pipeline and has always been of interest to researchers. In this study. the phenomenon of water hammer due to the sudden closure of the valve in the downstream end has been investigated in a laboratory and using a numerical model. https://www.roneverhart.com/Phi-Mu-Mom-Dad-Embroidered-Button/