Good day. I would be grateful if you could tell me what "system", and what type of pump suits me to give the best possible solution for the following situation in a building with 4 floors and 30 and peak departments: - There is a 2000 liter tank buried, with its filling pipe at ground level, supplied directly from the network. - On the roof there is a 10,000 liter tank. - The water lift is done by means of a 1.5HP centrifugal pump (there is a backup). The bottleneck of the entire system is at the filling speed ("recovery") of the tank ... how can I make the tank fill faster, being that it is supplied directly from the network? I am not a specialist in the subject, and beyond having read a little and see for example that a self-priming pump would be a good option, I turn to your knowledge and experience to see that they recommend me. It happens that for some reason the upper tank has been completely emptied (presumably cut off of the water and / or electricity supply), and then although it goes up some of the upper tank, it was never possible to recover 100%, and a " buckle "where when a little water rises to the upper tank, it is consumed very quickly. I understand there may be a certain "psychosis" of people in which water does not appear, everyone uses it (washing clothes, showering, reserving water "just in case"), and it may even happen that there are those who may have left taps open " to see when the water returns ", and if they are not at home when water appears, it is a continuous and unnecessary emptying of the upper tank ... and for all the above, it is not possible to recover the level ... Obviously, once the upper tank level has been recovered, all the pipes will have to be purged well, to avoid problems, right? Awaiting your comments. Thank you.

Hi EugenioG Unfortunately, the only alternative would be to put a larger cistern, the other is to make users aware by placing notes on the bearings. The suction of the network with pump is prohibited, you would leave the rest of the users without supply and on the other hand in case of cutting the network surely the pump would burn. A possible alternative is to regulate the upper float so that it asks for water faster, do not wait until the upper tank is in the middle to raise water, perhaps never in time to fill the tank. The tank has 2000 liters and a little has to be at the bottom, when the upper tank reaches that level (2000 liters less) the pump should already be raising water. He will work more times but for shorter periods. Regards

The solution is not very complicated, you must regulate the top tank filling system that begins when the level drops, suppose 5% of the capacity, the only thing you will notice is that the pump is running very shortly but several times what you achieve is that with low consumption the top tank refill begins.