Lots of questions.
First one, they gray plastic thing on the side of the central vac, there are 2 of them one is right behind the other. They are the mufflers for the exausts. There are 2 because the unit has 2 motors.
Second one, The red and white canister is a Health-More Princess canister, like a cheaper Filter Queen.
Third, that is a polished metal Silver King next to the Fairfax, not a WaterMatic.