Aerator

A faucet aerator (or tap aerator) is often found at the tip of modern indoor water faucets. Aerators can be simply screwed onto the faucet head, creating a non-splashing stream and often delivering a mixture of water and air.
An aerator serves the following purposes:
prevent splashing
shaping the water stream coming out of the faucet spout
water conservation and reduction in energy costs
reducing faucet noise
Faucet aerators are often used in homes with low water pressure in order to increase the perceived water pressure. film heating system continues pouch style central seal pillow pouch.