What is happening
You take control of a rooftop tank feeding a sprinkler system four floors down.
The sprinkler heads are not opening. They need 117 720 Pa, water is 1 000 kg/m³, and the tank sits at the wrong height above the risers.
Pressure with depthRunning
Pressure at the head
234459Pa
Opening pressure
117720Pa
Pressure at the head is over by 116739 Pa
Piston bench. Tank height at 23.9 m. Pressure at the head 234459 Pa, Opening pressure 117720 Pa. Currently pressure at the head is over by 116739 Pa.
What has to balance