I have a 4-filter Hayward pump from 2003 and when the pump is running there is a drip coming from the center o-ring area, and also it's leaking at the top where the pressure dial is connected to the top of the filter container. I bought a new large o-ring and replaced it, even though the old o-ring is just 9 months old. I think that leak stopped (it's hard to tell because it's been raining.) I have never touched the pressure dial on top and it's never leaked before. I can't get it to budge, although there are arrows showing that it turns both ways to remove. (Is there a "trick" to removing it?) That part has 2 o-rings according to the diagram, and the pool store had to order those for me, but I'm not sure if that is the problem or not. Has anyone else had these similar problems - of leaking from the top AND the middle of the pump? And if so, were they o-ring related? It just seems odd that this is happening suddenly. I have seen the top area leak off and on ever since I got the new variable-speed pentair pump several months ago. Before that it never leaked from the top. But it will go for weeks and NOT leak.