Abstract: An improved electrolyzer is disclosed herein. The electrolyzer includes a housing having an inlet and an outlet at a common end. Within the housing are disposed electrode elements, and a passageway that connects the inlet to the outlet. In accordance with the improvement disclosed and claimed herein, a divider is disposed in the fluid flow passageway between the inlet and outlet. It serves to cause fluid entering the inlet to flow through one section of the passageway, and then through another section of the passageway before exiting through the outlet.