What number is 1 to 12 at the top of rifeng pre-filter screen?

The number 1 to 12 at the top of Rifeng prefilter is used to adjust the water flow at the outlet of the filter. These numbers represent 12 different water flow gears built in the filter, and users can choose different gears to adjust the water flow according to their own needs. Generally speaking, the larger the number, the greater the water flow at the outlet, and vice versa. Users can adjust the water flow by manually rotating the selection disc at the top of the filter to meet their different needs. In the process of use, users can choose the appropriate water flow gear according to the actual situation to ensure the use effect and comfort.