[pdiddy]

I want to get educated on how vacuum works on the these 3 types of units especially in the case of using check valves or not using them when it comes to catch cans and the possibility of sucking oil in. So from my understanding with a roots type blower like my Maggie there is no need for a check valve as the snout on the blower will always be under vacuum is this a valid statement if not please elaborate either way how this works and if you would explain how this may differ from a centri or turbo setup where I believe a check valve may be needed. thanks in advance