I was talking to Mark (toUtahNow) the other day, and he said I should post this. I have used my microDrain a few times now to inspect the lines for swimming pools. The camera easily gets past the first 2" elbow, but I could not make it through a second elbow, which I think is to be expected. Fortunately, that was enough to find the problem each time. The owners of the pools were happy to know what the problem was before they had to start tearing out the slabs around the pools. Just another example of how handy this little camera is.