Translations:Pumpen, Betriebs- und Regenwasserwerke/83/en

The larger the number of fixtures, the less likely it is that all fixtures will be used in simultaneous operation. Therefore, it is generally not sensible, due to ecological and economic reasons, to choose a pump that is capable of supplying simultaneously all extraction points. The relationship between the required maximum discharge of the pump (Q_SP) and the total discharge (∑Q_P) of the extraction points is called the simultaneity factor (f):