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TSN79
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I'm aware that the term means the remaining pressure at a point while there is flow. Say the distribution pipes downstream the sprinkler valve have a calculated total head loss of 3 bars during the designed flow. Does that mean that the residual pressure at the sprinkler valve needs to be at least 3 bars to achieve the designed flow? It just seems so unintuitive to me. After all, if I get the designed flow at a lower residual pressure, why would that be an issue?