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The following section calculates the flow of alum given varying alum stock heights (of 5 inches to 25 inches). The final graph depicts results showing that if alum stock height varies greatly, the flow remains generally within the acceptable flow error. This error stems from the fact that we are not using alum for flocculation.
These results prove that this design will not work well with our point-of-use unit either. By playing with the dimensions of the tubing, pvc cap, alum doser itself, and more, the lowest average flow we could obtain was around 6 mL/s. Though this is better than the "Series of Orifices" design, it is still extremely high for our desired system. Given this value, 518 L of alum stock would be used per day. This would require a large holding tank well beyond the size we originally planned to use.