Egon, Easier said than done. There may be a periodicity or repeatable sequence but I haven't figured it out yet if it exists. It isn't like in large cities where the water pressure fluctuates in time with TV commercials from all the folks waiting till commercial to go to the bathroom.

It may be something like a random sequence where when the cylindrical water storage tank/tower gets to its lower set point and a pump fills it to the top set point. This would give varying pressure due to the head but not related to consumption in a simple manner. The highest and lowest pressures would not follow a schedule. How often the fluctuations occured would be a function of average usage but peak usage might happen at peak pressure.

[img]/forums/images/icons/smile.gif[/img] Pat [img]/forums/images/icons/smile.gif[/img]