1. How do I activate a system, to test vacuum, when the contacts to start the vacuum motor are in the interior of of the vacuum outlet?
2. What is the recommended vacumm suction parameter, in inches of water column, (i.e.minimum & maximum), considered to be functioning properly?
1. You can short the contacts INSIDE THE MAIN VACUUM HOLE or wire in the wall with a piece of foil or a paper clip. You will not be shocked. If your inlet says 110 volt anywhere be sure not to put a paper clip into any small holes. 2. Recommended waterlift minimum is 70 and max 140. Three stages motors have more suction than two stage (which have more airflow). Only dual motors in series increase waterlift, not dual motors pulling air from the same plain. Dual motors on the same plain increase airflow not waterlift.