Thank you for the response.
But I think you misunderstood my question but let me first clarify some points:
The definition of "Loading Units" according to my understanding and what I read is:
"Loading Unit": A factor which takes into account the flow rate at the appliance, the length of time in use, and the frequency of use.
The loading units have a built in simultaneity factor.
In the KSB document that you pointed me to (I managed to understand what I need using Google Translate) the simultaneity factor was added at the end after summing all the flows demanded by the individual fixtures.
In the Loading Units method the the simultaneity factor is included along with the summation.
Another point is the following: In the Loading units methods (there are several out there based on the same concept) one cannot multiply flows. Say for a small building I have a total of 200 LUs (Loading Units) and the corresponding flow is 1.7 L/s. For the a sky scraper with 2000 LUs, the flow is NOT 1.7 x 10 = 17 L/s. It will be much lower. One has to refer to the data tables. The trend the data follows is that the simultaneity factor decreases as the number of LUs goes up.
Now, the reason my flow in other thread was much higher than what you came up with was because I was using a data set based on Hunter's Curve, which was developed in 1924. It has already been established that it tends to over-estiamte flow demand, especially for relatively small applications. But it still exists in some codes so it has some credibility.
My question for in this thread is: The methods I am using are aimed at pipe sizing, including the main pipe attached to the booster pump. Now, if I get that the most probable flow for my main pipe is X L/s, does this mean that I can take my pump flow to equal to X L/s despite the fact that the calculations I used were for sizing the pipe, and not the pump. According to my logic the pump flow-rate should also be X L/s, but I'm wondering if there a catch somewhere.