Fully self contained sump with Whale® 500GPH submersible pump, multiple inlets and automatic electronic field sensor switch designed to pump grey waste overboard, or to holding tank, via a single outlet hose. Quick access clear snap shut lid with integrated seal provides instant visibility of stainless steel filter for build up and allows easy access for cleaning. Multi-sized outlet hose connection (19mm to 25mm) is open while the three multi-size inlet connections ranging from 19mm to 38mm are closed ready to be drilled or cut open as required. For additional inlets, skin fittings may be installed in the side of the box.