The anti backflow system prevents dirty water from being pumped into the clean water pipe, which is composed of layers of materials. Equipment with anti backflow system will be marked with DVGM passing mark on the package surface. Experience shows that 50 cm long pipes are enough, and 70 cm or more pipes can also be bought on the market.

Filter screen: in areas with poor water quality, the installation of filter screen can reduce and filter impurities, and prevent the possible damage of impurities to ceramic valve core. There are two installation positions of filter screen: water inlet and water outlet.