Fully self contained sump with multiple inlets, submersible pump and automatic switch to pump grey waste overboard, or to holding tank, via a single outlet hose. At the heart of the system is a Sahara 750 automatic bilge pump. Snap on/off gasket sealed clear lid provides immediate visibility of filter build up and allows easy access for cleaning. Outlet hose connections and anti airlock vent connections are open, the three multi size inlet connections are closed ready to be drilled or cut open as required. Additional inlets can be accommodated by installing skin fittings to the sump box sides.