Originally Posted by fonzie
You could use the anti-freeze inlet to pressurize system with water pump and then use outside shower with adapter hose to your fresh water tank fill connection.......
True, when you switch the valve it goes from sucking out of your main fw tank to what ever the hose is stuck in. I use a 5 gallon jug.
This pressurizes your water lines from your pump. The only way to get it into your fw tank would be to do as you suggest. I don't need any adapter. I can just remove the shower head and stick the hose into the fw fill port, open the cold water and turn on my pump.
Most of the time I don't bother, I just use the water from my jug and fill it back up when it gets low.