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What GPM LPM ?

 GPM means Gallons Per Minute. Also known as "flow rate", GPM is a measure of how many gallons of water flow out of your shower head each minute. Since 1992, a maximum of 2.5 GPM is the federally mandated flow rate for new shower heads. ... The GPM flow rate for shower heads has decreased over time Gpm ♡ . 1 gallon US per minute (gal/min) = 0.0022 cubic feet per second (ft 3 /sec)         Tt 1 US gallon per minute ( gpm ) is equal to 3.7854117839 liters per minute ( lpm ). To convert gallons per minute to liters per minute, multiply the gallons per minute value by 3.7854117839. For example, to convert 2 gpm to lpm , multiply 2 by 3.7854117839, that makes 7.5708 lpm is 2 gpm .   ***   L/min ↔ m3 / s 1 m3 / s = 60000 L/min . L/min ↔ m3 /d 1 L/min = 1.44 m3 /d. LPM  LPM is an abbreviation of litres per minute ( l/min ). When used in the context of a particle counter's flow rate, it is a measurement of the velocity at which air flows into ...