The black tanks are the waste recovery tank and auto pump out. They might be good for the carpet cleaning but they are needed for the reclaim.
The vacuum is connected to the waste tank. It vacuums through the red sand trap tanks on the side into the bottom of the waste tanks then pumps out to the oil water separator then to the filters then back into the water supply tank.
Nigel Griffith gave me a good tip I'm going to do. He said it would help to put a settlement tank between the waste tank and ows. I will use a 250 gal tote tank on the truck, the water from the waste tank will go into it through a pipe that will have the water going in low in the tank. Then I will leave it gravity feed to the ows. Thaw ill leave some dirt settle for 15 or more minutes. That should keep the filters running longer between cleaning. We will use that for parking deck.