The first one of these I had installed - it had to electrically grounded or something - lasted two years and then, while I was away for two weeks, cracked and flooded my basement.  The water company gave me a credit, but I didn't think to ask OMNI for a replacement unit.  I did replace it with the same and the second has worked great, very easy to change the filters now that I have the hang of it, I have never had a problem of leaks (knock on wood).  It has come to the end of it's 5 year life, it's doing great but I want to replace it now before it might crack and flood my basement again!