Coachmen leprochaun water heater bypass

Found the bypass valve. I had to remove a wood vent panel from beneath the fridge to access it. Found the three low point drains in the basement, behind a panel, next to the water pump. Also found the single valve on the fresh water tank under the bed. Was not able to get the antifreeze to suck into the fresh water fill so in frustration I dumped the antifreeze into the fresh water tank and opened the valve. This eventually worked and I will have to flush out the pink stuff in the spring.

Still not sure why I wasn't able to suck the antifreeze into the fresh water fill with the pump running. What else am I missing?

Thanks to all for your help.