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How can I model a Vent Pipe or stand pipe in HAMMER?
The Surge Tank element is a good way of modeling a vent pipe or stand pipe in HAMMER, as it simulates water in a vertical pipe/tank with a free water surface.See below article for a note on what happens if the surge tank becomes empty during the transient simulation.
What happens when a tank becomes empty or full?
Modeling reference for Hydropneumatic tanks