Water flow controls and apparatus, namely, a self-activating vortex flow control device; water flow apparatus valves for controlling and attenuating flow in water collection systems, for storm water detention, for control of watercourses and for flow control in flood storage areas; water flow apparatus valves used to dissipate energy at the end of a line to reduce turbulence and minimize erosion to surrounding structures; water flow apparatus valves for controlling and attenuating flow in foul and combined sewers, sewage treatment works and balancing ponds, and for catch basin inlet flow control; structural parts and fittings for the aforesaid goods, namely, by-pass doors, adjustable intake gates, vortex suppressor pipes and vent pipes