Abstract: A jet pump is manufactured using additive and subtractive techniques. A tubular body and a diffuser formed therein form a monolithic structure. The tapered diffuser is continuously curved from a throat end to a discharge end. A cross-sectional area at the discharge end is optimized without compromising a cross-sectional area of a production conduit defined in an annular space between the body and the diffuser. The body can be shaped to include radially extending localized or circumferential protrusions to maximize fluid conduits within the pump. A one-way valve is formed within the production conduit using the additive and subtractive techniques and is integrated in the monolithic structure.