Help with Coachmen "Water Works" panel

DrewE wrote:
It appears that the right hand valve is between the pressure side and the tank inlet, i.e. the fill valve. The left hand valve apparently selects where the hose inlet and pump inlet hook up. I would try the left valve in the winterize position and the right valve in the fill position -- i.e. both valves pointed at each other. It may not work.

Another method for getting the bleach solution into the tank that many people use is to set the valves to fill, pour the appropriate amount of bleach (undiluted) into the far end of the hose, and then hook it up to the spigot and fill as usual. The bleach will dilute properly when the tank is filled. The short burst of undiluted bleach won't harm the plumbing or hose in any way, though it might not be a great idea to let it sit there for hours or days on end.

That definitely is the easiest way. I was hoping to get it in my brain just how those valves worked in the plumbing. I was going to put the bleach in this evening and let it set overnite but it got late and didn't have time to experiment with the valves. I'm not sure about the venting of the tank and am a little nervous about pumping into the tank anyway until I know how it's vented. I'm sure it is, I just don't know where it is so I can watch for it to start spitting when the tank is full.