My downspout, next to a stucco wall, used to go into a cast iron pipe. Recently, the water must have gotten behind the stucco and in the winter, the stucco wall collapsed, pushed the downspout out of the way, and filled the cast iron pipe with stucco debris. I was able to clean up the vertical part of the pipe (about 2') with a shopvac. But then the pipe turns the corner and I can no longer reach past the corner.
I know that it's still completely clogged. When it rains, it instantly fills up. Also, the shopvac hose gets sucked in when I put it down there, confirming that it's clogged. I imagine that there are large chunks of stucco past the turn.
A roto-rooter type company is coming out tomorrow to take a look at the issue. Before I spend money on whatever they propose, are there diy things that I could try?