The Tideflex Mixing System (TMS) greatly improves drinking water quality in water storage reservoirs. The TMS is a combination of patented Tideflex check valve technology and a piping manifold that separates inlet and outlet. The TMS can be installed in new or existing water storage tanks of all types to eliminate stagnation and short-circuiting. Operating on differential pressure that is already in place, the TMS keeps energy costs low. In addition, the elastomer construction of Tideflex check valves renders the system virtually maintenance-free.