The value of GPM is used to specify how fast water moves, e.g., through pumps, showerheads, and pipes. A gallon can be either the US liquid gallon (about 3.785 liters) or the British imperial gallon (4.546 liters). How to use the GPM calculator To find the flow rate - e.g., ...
Find GPM ( Gallons per minute ) or liters per minute using this tool / calculator. It is also useful to find water flow from a leak, available flow rate per minute or per hour, through a pipe or hose and even the amount of water used for showering or a leaky faucet. ...