Hi John....i've seen that same situation in some homes in Chicago. Since we have a combined sewer system (waste and perimeter drainage go to the same sewer in the street) it may not matter that there is only one pit and pump that serves both purposes. However, if there is a lot of groundwater to pump out then the pump is doing double duty and will have a shorter service life. I, like most inspectors I think, don't take the cover off of the sewage ejector pump so I could not see the drain inlets. I did call a couple plumbing pals who were not aware of any code restrictions regarding this type of set up.

Dan Cullen