Ok, I know I am not the only one that has run it to this. The electrical box on the pump has been filled with some hard black stuff. This is the first one I have seen were they filled the pipes full along with the box. How do you get it out of the pipes? This stuff chips pretty easy but the top light has a "s" curve and I can't get to it ... is there anyway of using something to loosen it up like thinner?

Looking for anything from Hoosier Pete, Platolene 500 and Red Bird.