Marine greywater disposal system

A greywater disposal system, comprising:

• a greywater sump having a first and second endwall, a pair of sidewalls, a top wall, and a bottom wall, the bottom wall defining a sump drain and sloped toward the sump drain;
• a plurality of inlet ports in the first endwall and an inlet chamber defined at one end of the greywater sump by a chamber wall between the first endwall and the sump drain, the chamber wall having an opening at the bottom thereof to permit egress of the greywater from at least one of the plurality of inlet ports to the sump drain;
• a pump for pumping the greywater out of the greywater sump;
• and
• at least one sensor mounted on the chamber wall inside the inlet chamber of the greywater sump and associated with a controller for automatically activating the pump as greywater exits the inlet chamber through the opening in the chamber wall to discharge the greywater from the greywater sump simultaneously with the introduction of greywater into the sump;
• wherein the at least one sensor is a conductive electrode sensor with a pair of sensor prongs;
• and
• wherein tips of the sensor prongs extend across a portion of the opening at the bottom of the chamber wall, are suspended vertically above a center of the sump drain, and are positioned in an upper portion of the sump drain.

A method of disposing of onboard greywater comprising the steps of:

• providing a greywater sump for receiving greywater from onboard washing activity using one or more onboard plumbing fixtures, said greywater sump having a sump drain at a low point thereof;
• and
• providing at least one sensor in said greywater sump to close an electrical circuit to automatically activate an associated pump to pump said greywater out of the greywater sump during the onboard washing activity simultaneously with the introduction of greywater into the sump;
• wherein the sump drain has an upper portion and a lower portion;
• wherein the at least one sensor is a conductive electrode sensor with a pair of sensor prongs;
• and
• wherein the conductive electrode sensor is suspended vertically above a center of the sump drain and both tips of the sensor prongs are positioned in the upper portion of the sump drain.