Howdy OOglebird, it drains back through the flood pump. Again just using gravity, all that water just pushes its way out through the pump,did you know water will flow backwards though a pump gven enough pressureand a little time , its not the fastast way to drain, but not bad either.
peace
bonz
>>>>>>>>>>>>>>>>>>Nam myoho renge kyo>>>>>>>>>>>>>>>>>>>
peace
bonz
>>>>>>>>>>>>>>>>>>Nam myoho renge kyo>>>>>>>>>>>>>>>>>>>