The St. Petersburg company Geyser has been operating on the market for about 30 years. The uniqueness of this manufacturer lies in the creation of a production and scientific holding. The Geyser company is deservedly a leader in the production and sale of products in this industry. A distinctive feature of the technology is the use of microporous polymer for the purification of tap water. The most popular Geyser water filters, reviews of which you can find below, are jug filters. The Geyser Bio 321 water filter is common in domestic use.