Thanks. I have read about the Tornado, but I was wondering about the Weld-A-Flush that FR installs. I have not written to FR yet, but I was wondering if anyone has installed a Weld-a-Flush after purchase. Do the black water tanks come with the part inside already installed, therefore just needing to hook up the peripherals? There is a place for one on the panel with the fresh water fill. Does anyone know where it would be located on the black water tank? We tried looking for a spot to put the Tornado, if we got one, and cannot hardly see the tank, let alone where to install it. I would hate to go to the work of taking the pluming apart, and then the entire panel, to then find out we did not have to. Because we bought this from a dealer we are having to discover everything on our own. Can get a bit frustrating, and the paperwork is definitely lacking all the info we need.