Ultra-low flow aerators - how low can you flow?
Up until now, I was under the impression that all faucet aerators are the same: they add a little air to the water flow, thus "spreading" the water and reducing the amount coming out of the faucet at the same time. Well, it turns out there are different grades of aerators: the flow can vary from 2.5 - 5 gallons per minute (in a standard aerator) to as little as 0.5 gallons per minute (in an ultra-low flow aerator). That's a huge difference if you consider how much water you use out of your faucet! If you installed one of the ultra-low flow aerators on faucets you use for handwashing, brushing your teeth, etc. it could save you thousands of gallons of water per year. If you need to fill pots with water (such as at the kitchen sink), a standard aerator might be a better fit for that application (even though you can also purchase aerators that can switch between standard and low flow with the flip pf a lever).
To find out how much water comes out of your faucet, simply time how long it takes you to fill a gallon jug of water. Divide 60 by the number of seconds it took to fill the jug to find the flow rate. Example: it took 20 seconds to fill the one-gallon jug. 60 divided by 20 is three - your faucet has a flow rate of 3 gallons per minute.

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