So I may have misunderstood the original post. I was assuming you meant the waterpump draw bypass. Our unit did not come with one of these from the factory. We did however have a waterheater bypass already installed. It is my understanding that you never want to run antifrezze through the water heater. When I winterized I did bypass the water heater. My apologies. This now makes sense to me that someone said it would take more than the 3 gallons of antifreeze. I should have realized this but I did not.
2016 Wildwood 261 BHXL
2012 Ford F150 XL 5.0 L