Prerotation basin for pumping fluids from a wet well

A prerotation basin for use in a wet well, comprising:

• a basin body having a top edge and a base edge;
• an upstanding exterior wall extending between the top edge and base edge of the basin body;
• an interior concavity formed in the basin body, the interior concavity having a bottom surface and an interior wall that is continuous with the bottom surface of the interior concavity;
• and
• a fluid entry channel formed in the basin body defined by a discontinuity in the upstanding exterior wall of the basin body, the fluid entry channel extending from the top edge of the basin body to a channel floor, the channel floor beginning at a threshold point positioned at the upstanding exterior wall of the basin body proximate the base edge and extending to the bottom surface of the interior concavity,
• wherein the threshold point of the channel floor is positioned at an elevation, relative to the base edge of the basin body, which is lower than the elevation of the bottom surface of the interior concavity relative to the base edge.