This isn't related to pizza, but this forum has some smart people and I'm hoping to get a quick answer so that I can resolve this before the rain comes.
I have a golf ball sized hole in my 100ish year old cement foundation wall in my basement, that, due to water coming in when it rains, I know it runs to the outside. The channel curves and twists and, after hours of searching, I can't find where the opening is on the outside. I can track the hole about 4" in, and then it zigs and zags upward and I can't track it beyond that. I've tried a wire hanger and a plumber's snake, but the channel is too jagged.
I tried grounding up some colored chalk and blowing it throw the hole to find the source, but that didn't work.
I think a smoke bomb might help me locate where the hole goes, but fireworks aren't legal in my state. Even if I could get my hands on a smoke bomb, I'm not sure the hole is big enough to provide enough air for combustion.
Any ideas how I might track where this hole goes?