Water tower or watertower tank reservoir used to pressurize distribution for potable water emergency storage for fire protection. Golden hour sunset.
Many bridges over river in sunset, Harrisburg, Pennsylvania, Susquehanna river crossings aerial view, dramatic evening reflection in water
Hydrostatic test and manometer ( pressure gauge ) of the process piping in the workshop. Pressure tightness can be tested by shutting off the supply valve and observing whether there is a pressure loss.