I have a PVC dust collection system comprised of 3" piping through my shop. It works pretty well, except I would benefit from a bit more airflow. I have two shop vacs, one of which is pretty much dedicated to this task, the other is just a miscellaneous use one.

If I hook them up to the same outlet on the pipe, can I increase the airflow through the pipe? The pipe will support it (by my calculations) but I am not sure if it is effective by having the two vacs.

I also don't want to stress the motors or cause the fuse to blow continuously, so this is not a 'try it and see' scenario.

Thanks!