Hey guys,

I am having trouble with my center ballast bag not emptying all the way and not sucking flat like all the others do.

My setup is a follows:
-1100 in rear lockers with dedicated aerator pumps for fill and separate dedicated aerator pumps for empty (these bags suck flat). These bags have dedicated vents as well.
-400 in center ski locker with the top vent plumbed to the fill of the two legs of the 650 IBS in the bow. The IBS is vented out of the top. Dedicated aerator fill pump to these as well. Dedicated aerator empty pump with the three lines (2 IBS legs and 1 400 empty line) t-ed together before the empty pump.

The IBS sucks completely flat and I suspect that when this happens it is stopping the center bag from getting the flow through from the vent it needs to get all the water out of the center bag.

I am thinking about T-ing in a vent on the center bag line to the IBS with a one way valve that will stop water from pushing out but allow air in when the IBS has sucked flat.

First of all, in not sure I have explained it very well- my apologies.

If you do get what I'm going on about, what are your thoughts?