Hello everyone, this is my first post on this site. I have a 6 year old pentair 1.5 hp single speed superflo pump. Within its first year there was a leak where the seal plate attaches to the housing. They replaced it but for years I think there was a slight wet area there. Now I notice water at the buttom and my pool losing an inch or so every two days. I took it apart and noted the o ring where the seal plate attaches to the housing and it looks fine. There is not flatness or rotting or any thing. I put it back together after greasing the o ring and man the leak is worst than before. I note what i call a flaw in the design in that the o ring goes around the seal plate portion but when you look inside the volute housing its tapered and not flat to squish this O ring. I called the local pool shop and none in stock so I ordered one on line. I am worried that when i put this new o ring and it closes the same way its not compressed correctly and will leak again. Does anyone know about this pump and what I am talking about, advice, etc.