4. What filters are in a teapot? In many, even the most simple models Dummies installed filters. But it is not worth entertain the hope that they clear water of harmful contaminants - they just mechanically prevent the ingress of stones in the cup. Such filters are installed in the spout and can be made of nylon or stainless steel, they can be as removable or not. Some models are equipped with two such "mechanical" filters - one protects against ingress of lime into the cup, and the second - from getting small foreign particles from tap water. Some manufacturers have developed a special filtration system for electric kettles. For example, the firm uses a filter Philips Double Action, which works in two ways: a special part of the filter keeps the scum, as a regular component prevents the particles of lime in the drink. Teapots with full built-in filters for water purification in the Russian market are presented in a small range.