Our current unit is a brand spanking new 2015 model with all the bells and whistles. I asked the original question because I was unfamiliar with all the bells and whistles.
We owned our old trailer for 27 years (second owner) and she turned 50 this year (1964 model). She was moved to the back of our site and our son will use her from now on. (Boy they sure made them to last back then, with a little bit of maintenance)
My wife refuses to drink RV water. We take bottled water for her tea. So whether its bleach or pink stuff, all it will be used for is dishwashing and showers.
WE filled the water tank with pink stuff for 27 years, flushed it till there was no pink and it worked fine. Before I used pink stuff i merely drained all systems. The 100 ml of water left in the low line froze and burst the line. I learned right then that all lines need to be flushed pink, not just drained.