Profile: Tonka Equipment Company is in the business of offering water treatment solutions. We design products for surface water, groundwater, environmental remediation and tertiary filtration as well as commercial and industrial applications. Our structure and vessel materials range across the full spectrum concrete, steel, stainless steel, aluminum and fiberglass. Our product line includes simul-wash, retrofits, membrane, pressure filters, centralators and dualators. Our centralator is a four-cell cluster filter usually of concrete construction but can be fabricated from steel as well.