If you are mainly dealing with clean water and there is no chance of the water freezing with the pump, the M98 or StormPro model BA-50M would be a good choice to start with. Since it's difficult to judge just how much pumping capacity will be needed. If there's more of a chance of debris getting into the pump, you might consider one of our SEWAGE PUMPS as they can handle some of the small solids like leaves and small twigs. Please note that for any outdoor application, all electrical connections would need to be very well protected from the elements.