Meimuzun and Chunyue pre-filter, and Chunyue pre-filter is good. According to the relevant public information of the investigation, Chunyue pre-filtration reduces the load of the motor and prolongs the service life of the filter element. Meimu Zun doesn't have this function, so Chunyue is good. Pre-filter is the bane of secondary pollution in water supply network, which can restore the water quality to the factory standard of tap water and is a reliable impurity filtering device.