Irrigation Professionals with questions about ... - Hunter Industries

How Pressure is Created By the Weight of WaterWhat water weighs at 60° F:• 1 cubic foot (ft. 3 ) or 1728 cubic inches (in. 3 ) of water = 62.43 lb.• 1 cubic inch, (in. 3 ) of water = 0.0361 lbs.Water creates pressure in landscape irrigation systems by the accumulatedweight of the water.In Figure 6, we can see a container 1 ft. high and 1 ft. wide, holding 1 ft. 3of water, would create a column of water 1 ft. high over every square inchon the bottom of the container.12 in.12 in.12 in.1 ft 3 of waterFigure 6If we look at just one of those columns, Figure 7, we can calculate theweight of water pressing on the bottom of the column in pounds persquare inch (PSI).