I've played games like this before but this one on neopets is quite stupid. The point is to get from one end to the other, even if some of the pipes have other paths, but still, it should still count.. I'm on level THREE and i can't get past it.. it's the stupid piece of crap ever.. is there a trainer for this?
Have you tried just trying to follow a guide? I used PPT when I played it on an old account and I completed it. It's really not that hard if you know what pieces you're looking for then just dump the ones you don't want. At the start, you will sometimes end up with fewer points at the end of a level than when you start, but once you get past the first few levels, that doesn't happen anymore. Anyway, link: http://www.pinkpt.com/sewage_sol.htm