Patent ID: 7597116

Claim:
A greywater disposal system for onboard plumbing fixtures, comprising: a greywater sump for receiving greywater from one or more onboard plumbing fixtures, the greywater sump having a sump drain in a bottom wall, the bottom wall sloped toward the sump drain; a pump in fluid communication with the greywater sump; at least one sensor mounted within the greywater sump and associated with a controller for automatically activating the pump simultaneously with the introduction of greywater into the sump to dispose of the greywater within the greywater 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.