When shopping for a new kitchen faucet, one of the first things you'll want to consider is the flow rate. Gallons per minute are the measurement of how much water flows through a kitchen faucet in one minute. Older faucets had flow rates around two GPM, whereas modern faucets are more likely to have a flow rate of 1.8 GPM or less. Flow rate is an important consideration for a kitchen faucet, so it's important to research the different options available.