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Faucet Knowledge

What is the Flow Rate of Faucets?

1.What is an Aerator?

Aerators are small parts placed on the end of faucets. Typically they are small mesh screens that break up the flow of water into multiple small streams, adding air in between.

By diluting the water stream with air, aerators significantly reduce the volume of water flowing from your faucet. They do this while maintaining the feeling of a high-pressure flow. Aerators also reduce splashing in sinks.


2.The Function of Aerator:

  • Prevent splashing,and reduce faucet noise:When a single stream of water hits a surface the water must go somewhere, and because the stream is uniform the water will tend to go mostly in the same direction. If a single stream hits a surface which is curved, then the stream will conform to the shape and be easily redirected with the force of the volume of water falling. Adding the aerator does two things: reducing the volume of falling water which reduces the splash distance, and creating multiple “mini-streams” within the main stream. Each mini-stream, if it were falling by itself would splash or flow in a unique and different way when it hit the surface, as compared to the other mini-streams. Because they are all falling at the same time, the streams will splash in their own way but end up hitting other splash streams. The resulting interference cancels out the majority of the splashing effect.
  • Conserve water and reduce energy costs:Because the aerator limits the water flow through the faucet, water usage is reduced compared to the same duration of flow without an aerator. In the case of hot water, because less water is used, less heat energy is used.
  • Increase perceived water pressure (often used in homes with low water pressure); sometimes described as a pressure regulator or flow regulatorThe perception of water pressure is actually the speed of the water as it hits a surface, (the hands, in the case of hand washing). When an aerator is added to the faucet (or fluid stream), there is a region of high pressure created behind the aerator. Because of the higher pressure behind the aerator and the low pressure in front of it (outside the faucet).
  • Provides slight filtration of debris due to a small sieve plate,Shape the water stream coming out of the faucet spout, to produce a straight and evenly pressured stream


3.Why Would I Get One?

People buy and use aerators in their homes for two main reasons: to save water and to save money.

First and foremost, aerators are master water-savers! They are one of the most environmentally friendly plumbing parts on the market. In fact, installing faucet aerators is the single most effective water-saving plumbing change you can make!

Of course, saving water is not only great for the environment – it’s great for your wallet too! By reducing your monthly water usage, aerators can easily and consistently lower your utility bills.


4.What Aerator Should I Choose?

Not all aerators are the same, so keep the following factors in mind when searching for your faucet aerator.

Male/Female Threads: Aerators come in “male” and “female” varieties. Which one you need depends on your faucet. If your faucet has threads on the outside, then it is “male”, and you should use a “female” aerator. If your faucet has threads on the inside, it is “female”, and you should use a “male” aerator.

Size: Aerators typically come in one of two sizes: regular (usually 15/16” Male or 55/64” Female) and junior (usually 13/16” M or 3/4” F). You can measure your faucet, or use a simple shortcut using coins. If your faucet is roughly the size of a nickel, it needs a regular-size aerator. If your faucet is roughly the size of a dime, it will use a junior-size aerator.

Use: Different aerators restrict water flow to differing levels, typically 2.2 gallons-per-minute (gpm) for a “standard” aerator. Certain aerators will be more/less appropriate depending on what task you’ll be using the faucet for. Lower-volume aerators (e.g. 0.5-1.0 gpm) are perfect for washing hands/dishes, while higher-volume (e.g. 2.2 gpm, or no aerator at all) are better for tasks like filling large pots.

Style: There are three main aerator styles: aerated (standard spray of air mixed with water), spray (miniature shower spray), and laminar (non-splashing solid stream). Again, what style you want depends on the main use of your faucet.

Goals: Depending on how much water want to save, you have many aerator options to choose from. from the extreme water-saving 0.25 GPM aerator to the Microban-protected 1.5 GPM option.


5.What Is the Average Flow Rate of Faucets?

The average flow rate of faucets are between 1.0 GPM (Gallons Per Minute) and 1.5 GPM. Studies show that on average people open the faucet to a flow rate between 1.0 GPM and 1.5 GPM. According to National Standards, all faucets are subject to a maximum flow rate of 2.2 GPM at 60 psi (Pounds Per Inch).

The maximum flow rate allocated for faucets is 2.2 GPM according to National Standards. Nonetheless, the flow rate can be reduced to 0.8 GPM without affecting the water pressure. Furthermore, it would also be significant saving on your water bill.

6.Aerator Maintenance

Make sure to regularly replace or clean your faucet aerators, as they can become clogged with silt and other debris over time. A simple brush and rinse will usually do the trick, though sometimes a multiple-hour soak in a vinegar-water mixture will be necessary.