Can someone tell me how the winterize valve works for this unit ? The boys and i were discussing winterizing around the fire the other night. I know you turn the valve to winterize and suck fluid up the hose. My question is how does the water heater bypass work ? My friends Big Horn has a bypass valve that you turn. Our Cyclone 3800 does not. I just can't remember what i did last year lol. I thought i had the cover removed behind the panel. Does someone have the wisdom ? Thanks