Abstract: This paper introduced the working principle of the integrated water quality pretreatment module and the components of the filter element, and analyzed the difference of the water purification effect of the composite filter with different components. The test data show that this module can effectively remove the sediment, chlorine, bacteria and other impurities in the water, which has a significant effect for bath water purification. The application of water purification module on electric water heaters made the bath water more health for users, and opened up a new direction for the development of water heater industry.

Key words: Integrated water quality pretreatment, Components of the filter element, Remove the sediment, Remove chlorine, Remove bacteria