How much water should/must come from the main line?

Hello,

a somewhat urgent question, the screed was supposed to be poured on Friday, the main water line from the street is located in the technical room, connected at the bracket but still without a meter. Directly behind the main shut-off valve, a faucet is installed.

The screed layer had connected the silo mixer to this faucet, both valves are fully open but not enough water is coming, the silo mixer needs 2000l/h.

The shut-off valve on the street is fully open. The waterworks say there is no more than 3 bar pressure, the site manager says even with 3 bar pressure 2000l/h should easily come from the line.

How much should generally come out there? The waterworks say I should put a pump in to increase the pressure, but if no more water comes from the street how is a pump supposed to bring more water in between?

Currently the construction is on hold because not enough water for the silo mixer is coming from the line.

Does anyone else have an idea what we can do?

Thanks already, greetz Jörg

directly behind the main shut-off valve there is a tap installed.

The screed layer had connected the silo mixer to this tap, both valves are fully open

Stupid safety question: Is there no aerator or other reducing piece at the outlet of the tap?

Otherwise, 3 bar should really be more than enough. Unless there is a bottleneck somewhere.

No, there is nothing in front, the faucet is located directly behind the shut-off valve of the bracket. However, I cannot verify the 3 bar specified by the water supplier.

connected at the bracket but still without a meter. a faucet is installed directly behind the main shut-off valve.

The water meter usually goes into the bracket. What is there now? The faucet is still before the bracket? Take a photo.

This is the current situation.

And simply removed the aluminum casting tap? It already has a considerable cross-sectional reduction.