I don't think it's the case of a water hammer. It's just a theoretical situation where we imagine the flow stopping "abruptly" but without the pressure wave.
Homework Statement
On a horizontal pipe with flowing water on point 1 there is a vertical pipe with water up to some point. On another point 2, we have a pitot tube (L shaped) against the water flow and the lever on the vertical part is higher that on point 1. If the water flow stops what...