How Do You Measure Inches Of Water?
Inches of water are measured using a device called a manometer. The manometer consists of a U-shaped tube partially filled with water, with one side connected to a tube that is open to the air and the other side connected to the source of the pressure being measured. The difference in the water level between the two sides of the U-tube is proportional to the pressure difference, with each inch of water column corresponding to a pressure of approximately 0.0361 pounds per square inch. The water level can be read directly from a scale on the tube and converted to an actual pressure value.