In the city, you can still look at the blue sky, but the flowing water is no longer clear. Today, when water pollution is getting worse, we have all chosen to use pre-filters.

　　The pre-filter serves as a line of defense for our domestic water, making our lives healthier. However, if you do not pay attention to the use of the pre-filter, you will not be able to get the desired effect, or even play the opposite effect.

The pre-filter should pay attention to replacing the filter element. First, you can determine whether your own PP cotton needs to be replaced by observing the color of your own PP through the transparent front. If the PP cotton in your home is more serious, you can replace it. The situation must be changed. Don't damage your health just because you are afraid of trouble or saving money!

It must be noted that close the water valve of the machine, and then open the faucet to empty the water passed by the expert Gu Jiu. Put a wrench on the filter bottle and unscrew the filter bottle clockwise (when unscrewing the filter bottle, use Hold the filter bottle cap with the other hand to prevent the connection of the pre-filter from loosening; take out the dirty filter element and put it in a new PP cotton filter element; check the white plastic gasket inside the filter bottle cap and the black gasket outside the mouth of the filter bottle Whether the pad is tight or not, if it is loose, press it tightly by hand; fill the filter bottle with half a bottle of tap water, put the filter bottle back into the filter bottle cap, and tighten it; open the water valve, open the faucet, and pass water for 5-6 seconds, then close the faucet .

　　 If you replace the filter element, turn off the faucet, if the continuous water flow time is extended, turn on the faucet, hold the main unit with both hands and shake it 3-5 times, then turn the main unit upside down for 5 seconds, and turn off the faucet. Remember to replace the filter element of the pre-filter to make it work better for us.