![]() ![]() We assume you are converting between inch of water column and pound/square inch.You can view more details on each measurement unit: inch of water column or PSI The SI derived unit for pressure is the pascal. ![]() How many inch of water column in 1 PSI The answer is 27.679904842545. This water supply graph shows a) static pressure at 60 PSI, b) residual pressure at 55 PSI at 300 GPM, and c) system demand at 60 PSI and 400 GPM. A ball valves PSI measures the pressure of the media that flows through the valve as it comes in contact with a square inch of pipe or other fittings. More information from the unit converter. Usually, this means a municipal water connection, but NFPA 13 allows tanks, ponds. Symbols, abbreviations, or full names for units of length,Īrea, mass, pressure, and other types. Every fire sprinkler system needs a reliable water supply. You can find metric conversion tables for SI units, as wellĪs English units, currency, and other data. It is the pressure resulting from a force of one pound-force applied to an area of one square inch.Ĭonversion calculator for all types of measurement units. The pound per square inch or, more accurately, pound-force per square inch (symbol: psi or lbf/in² or lbf/in²) is a unit of pressure or of stress based on avoirdupois units. foot of head to kilogram-force/square millimeter PSI stands for pounds per square inch, and this indicates how much pressure is being applied on the surface you are pressure washing.Psi to foot of head, or enter any two units below: Enter two units to convert From: 15Hg is a guide as it’s taken from a varying atmospheric pressure. However, the torr measurement scale is more accurate as it has with a datum point of zero atmospheric pressure. A system running at 50 vacuum is either 380 Torr or 15Hg. ![]() The water-based units still depend on the density of water, a measured, rather than defined. You can do the reverse unit conversion from (1) What is the pressure in feet of water (2) What is the pressure in pounds per square foot (psf) First convert pressure to feet of water: Head, ft Pressure, psi x 2.31 ft/psi. Therefore, 29.92 inches converted to millimeters is 760 (759.97). One millimetre of mercury is approximately equal to one torr. ![]()
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