General Filter products and processes have treated water supplies since 1935. Now part of the WesTech product line, General Filter continues to be a leader in the design and manufacture of many of today's proven treatment technologies. With over 1,000 installations, aeration technologies are prominent among those many innovations. WesTech provides all types of aerator systems-from pressure aerators and cascade aerators to positive draft designs. Our aeration manufacturing material has evolved from redwood to steel to fiberglass and finally aluminum. The General Filter maintenance-free aluminum designs that are offered today incorporate all of the advancements that have been made since initial product development. Positive Draft Aeration is an effective, inexpensive, and low-maintenance method of improving finished water quality for a large number of applications. Dissolved solids such as iron and manganese are transformed th their oxidized states, enabling thenm to be removed by downstream clarification and filtration equipment. In addition, the aeration process can remove objectionable taste and odors and reduce the chemical requirements of lime softening. Induced Draft Aerators are most often used for the oxidation of iron from groundwater sources, enabling the oxidized iron to be removed by downstream clarification and filtration equipment. The aerator can also remove some unwanted dissolved gasses like CO2, stabilizing the pH of the water and reducing the chemical requirements for lime softening and post reverse osmosis filtration. Forced Draft Aerators are best applied to high gas removal needs such as methane, hydrogen sulfide, CO2, and disinfection byproduct (DBP). Gas removal is accomplished by water cascading over internal tray slats or random packed loose filled media. Forced Draft Aerators utilize a non-overloading, belt-driven blower located near the lower side of the aerator housing.

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