http://i.ebayimg.com/images/i/251653184270-0-1/s-l1000.jpg
This is the kit I have. The modification I made was to drill and tap 180 degrees from the on/off valve and screw in the Filler valve to the new hole. That way, once the system was in a state of vacuum, you simply close the one valve, and then open the other valve to fill. Saves time!