AOS, The Final Solution

[The Radium King]

I looked at the vacuum pump route. some folks repurpose a bmw SAI pump to draw vacuum on the crankcase (that way electric not belt-driven). otherwise you have to find a pump that can handle grimy oily medium. another solution, if you are committed to emptying a catchcan regardless, is to route the output of the aos through a catchcan and into the intake as per usual. this way you have a backup if the aos fails (ie, the catchcan) and can tell if the aos is going by the rate the catchcan fills. there is a guy on this forum if you search that repurposed the air conditioning dessicant tank as a catchcan and said it worked great. otherwise, take a look at the aftermarket aos solutions available for subi wrx sti's - you might be able to repurpose one of those. there is also the option of the motorsport aos which is supposed to be more robust. finally, there is some thinking on this board that a failed pcv valve might be the cause for premature aos failure.

edit to add that it looks like mr. fro beat me to some of it!