My 405 started to leak after Sandy, I had it for 2 years with no problems. I thought it was a gasket so I replaced and it work well with no leaks till I did a water change. When I turn everything back on it started to leak again. I took it apart and I didn't see any cracks in the body. I had someone else look at it and he didn't see any cracks either. Does anyone have an idea what the problem could be. It is leaks where the motorhead connects to the body I've ordered another gasket but i feel that this may not be the problem.