Equalizing basin is installed ahead of the neutralizing system whenever possible. This will tend to level out fluctuations in influent flow and concentration. This point cannot be overemphasized, because the lack of such a basin has been the cause of many failures. Pumping from an equalizing basin at a constant rate eliminates the need for high range ability flow rate instrumentation. This, in combination with reduced variations in base or acid content, reduces the reagent feed range requirements. Equalization tanks are commonly used in industrial waste treatment to smooth out variations in flow and concentration that are expected in typical batch productions.