The size of the ducts and the lateral distance covered have no effect on the water head pressure. The water head pressure at the seal is 20 feet (6 meters). At one point, this system is filled with water to 20 feet (6 meters) above the seal. The system spans hundreds of feet (meters) laterally at multiple heights with various diameter ducts. Widespread duct systemĪ manufacturing plant has a seal at the bottom of a complex duct system. The only factors that matter are the height and depth of the ducts. The total amount of water does not factor into the calculation of water head pressure, nor does the duct diameter. The water head at the ground for each would also be 100 feet (30 meters). Nearby, there are two ducts rising 100 feet (30 meters), a 2-inch (5 centimeters) and 4-inch (10 centimeters) duct. The water head pressure is not affected by total volume of water, only by the height. The water head pressure at the ground would be 100 feet (30 meters). Thus, the water level is 100 feet (30 meters) above the ground. Below, we walk through a few examples.Ī 20-foot (6-meter) diameter water tower is 100 feet (30 meters) tall and is full. Water head pressure at a specific location is simply determined by the height (or depth) of the water above that location.
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