We have a 2006 340DA and today I was down in the bilge checking everything and noticed that the vacu-flush system would kick on periodcally to re-create the vacuum. Anyone know where I should begin in figuring out where I might have a leak in the system? I would guess the seal in the head but before I start messing with things it might be good to hear from someone that knows for sure. I am not real handy and being without income for two years now I am trying to do as much as I can myself (scary thought). Thanks to all that might help us out with some ideas.