A membrane module and method of making are provided, including a mold therefor. Exemplarily, the module, which comprises a membrane around which is formed a frame, is adapted for use with an electrochemical apparatus. The membrane comprises a fabric made from a synthetic fiber such as nylon, where the nylon is woven into ripstop nylon fabric. The frame, which comprises, exemplarily, high-density polyethylene (HDPE) or polypropylene, includes a wedge-shaped portion to facilitate collection of evolved gases and which provides support to the membrane as well as support to internal electrodes. The mold is adapted to suspend and secure the membrane during formation of the module and to provide a module which secures the membrane within the frame after formation of the module.