Apparatuses manage the flow of fluids, such as, for example, water, through pipes. Specifically, the apparatuses of the present invention creates a backward pressure in fluid traversing a pipe, wherein the backward pressure within the pipe provides compression to the fluid effectively compressing entrapped gas bubbles within the fluid, allowing more accurate water meter measurements and helps reduce or eliminate the failure to detect and record low fluid flow in water meters. Moreover, the apparatuses of the present invention provide backflow prevention. Systems and methods for managing fluids are further provided.