Abstract: The instant device serves to remove petroleum substances from pumped bilgewater in small boats. Bilgewater under pressure is pumped into a media housing chamber after having first passed into a filter housing chamber containing polyethylene beads that separate the petroleum substances from water. The purified water under pressure is pumped out of the media housing chamber. When petroleum product that is so separated builds up in concentration to a certain critical level, an electrical sensing component is activated serving to notify a person to open a petroleum product outline control valve on the media housing chamber and to close an outflow control valve on outflow piping attached to he media housing chamber in order to permit such petroleum substances to be pumped away into a collecting pan.