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The Premiere BG-202DIFS spotless water system has a very high capacity, providing 7,110 total grains filter capacity (see table below for gallon estimates based on your water hardness). This high capacity filter outperforms the competition significantly. The BG-202DIFS has two 20″ housings each with a deionization water filter cartridge. The entire unit is mounted on a powder coated, rust resistant frame that makes it convenient to move into position and store away when finished.
Deionized water is produced by removing the dissolved salt in water. Calcium bicarbonate, magnesium sulfate, and sodium chloride are the primary salts present in water and are removed by deionization. During the deionization process, water passes through an ion exchange material to remove all salt. The result is water that dries spot-free making it ideal for washing cars, RVs, boats, yachts, motorcycles, windows, solar panels, and more.
The approximate filter life (gallon capacity) will vary based on TDS (total dissolved solids) and the grains of hardness of your water supply. The included cartridges have a grain capacity of 7,110 grains between them. To determine how many gallons of deionized water these cartridges will provide, divide 7,110 by your grains of hardness per gallon (gpg).
Approximate Filter life = 7,110 ÷ grains of hardness of your water supply
For example, if you have hard water (10 gpg) the approximate filter life would be about 711 gallons. 7,110 ÷ 10 gpg = 711 gallons filter life
Hardness of Incoming Water (grains per gallon)
Filter Life of BG-202DIFS
Soft water (0 - 3.5 gpg)
2,030 - 7,110 gallons
Moderate water (3.5 - 7.0 gpg)
1,015 - 2,030 gallons
Hard water (7.0 - 10.5 gpg)
675 - 1,015 gallons
Very hard water (over 10.5 gpg)
< 675 gallons
Note: Deionization does not significantly remove uncharged organic molecules, viruses, or bacteria except by incidental trapping in the resin. Therefore, depending on your application and water quality you should consider filtering your water for viruses and bacteria prior to the deionization process.