For the last year, one of my gutter is constantly clogged and overflow. The gutter is almost impossible to reach so I had to hire someone to clean the gutter. Last weekend I decided this was enough and started digging around the downspout to see if the drain was clogged. To my surprise I found no drain (see picture). It’s just a T-shape PVC pipe. Both side of the pipe are open. This explain why the gutter would overflow when we get heavy rain.
Is this allowed in the building code? From my point of view someone clearly took a shortcut. I live in the Seattle, WA area (King County). The house was built in 2007.