How to buy household water purifier? A good pre-water purifier generally looks at the filter screen. this is the basic core. look at the process and technology of production. 1. the function of the pre-water purifier: mainly to filter out some impurities with large particles in the water, such as rust, sediment, red worm and colloid are mainly made of stainless steel or brass. 2. the amount of water used in the general design is more than 1 ton, but according to the 'building water supply and drainage design code', the hourly flow of the faucet is 0.72 tons, it is recommended to choose a pre-water purifier with a water volume of more than 1.5 tons, so as to ensure that the water pressure will not be affected. after all, the pre-water purifier is installed in the total pipeline. 3. the important role of the front water purifier protects the filter element of the terminal water purifier, sharing the pressure of the filter element of the water purifier, so that the filter element has more space to filter out oth
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