n one aspect, there is provided an

n one aspect, there is provided an electrolyzer comprising multiplicity of individual aforementioned electrochemical cells.In one aspect, there is provided a method, comprising: positioning a manifold inside an anode and/or a cathode pan of an electrochemical cell and fluidly connecting an outlet tube with the manifold thereby forming an anode and/or a cathode pan assembly, wherein cross sectional area of the manifold comprises depth of the manifold to be between about 0.25-0.75 of depth of the anode and/or the cathode pan.