Adding a pre-separator to your single-stage dust collector will save you time and money. It’ll save you time because it’s a lot easier to empty one of these than the lower, or “chip,” bag of a bag-over- bag collector.
The ultimate garage central vacuum. Install sanitary tees on the ceiling and drop a pipe near each car door. Install a long bend and a stubout to connect the hose. Cap off the stubout with a standard pipe cap when not in use.