Tap aerators

A faucet aerator is often found at the tip of modern indoor water faucets. Without an aerator, water usually flows out of a faucet as one big stream. An aerator spreads this stream into many little droplets. This helps save water and reduce splashing. The amount of water passing through the aerator is measured by Gallons Per Minute (GPM); the lower the GPM the more water the aerator will conserve.