Anyone have any knowledge on this, and could help ID what's what from the cover types?
I have the following covers on one side of my house, but not sure what counts as foul vs clean/surface drainage. I plan to run some water down the gutter pipe, and check which of these it then flows through. My idea is to hook up the overflow from my sump (already in place - which passes through the kitchen wall, and currently connected to nothing) to the gutter pipe (which isn't far away), but I'm told I can only do that if it runs into a foul water sewer drain.
So, here's what I have: