Only set the fire tank regulator, there is no regulator of the temporary high-pressure water supply system, the pressure switch how to set the pump pressure?
then look at how much the floor, the pressure switch is placed Alarm valve above, is the spray pump, not the regulator with the pump.
In the spray regulator pump outlet pipe connected to the pressure gauge, regulator pump in the roof, then start and stop 0.5 / 1.5 on the line, the regulator pump and the big pump together,
You can press the water tank to reduce the water level of 0.5m or half of the consideration.
