I changed the pump from the loop that was already built and removed the flowmeter and the thermometer that were already installed.
I used the D5 40% PWM setting in the existing configuration.
At this time, the flow rate is 2.76L / m, which is calculated 165L / h, so i think about the flow rate seems to be no problem..
Should I preserve the pressure in the loop when I shut off the loop?
I open the lid of the water bottle once to remove the air bubble.