I located the pump and ordered the kit to pump the antifreeze directly out of the bottle. My water heater came with the by pass from the factory, so that's one less headache to deal with. Having residual water in the fresh water tank is the only thing that would make sense as to why it was draining clear. For that to happen though, there must be several gallons of water in the tank. Do I need to worry about this freezing? Is it normal for that much water to be in the tank after draining it? The pump won't suck anymore out of the tank either.