New to group so apologies if answered before. 

we just purchased 2021 Pace Arrow and sales team said water and disposal tasks are heated but I don’t see any sign of that.

we visit Colorado in winter so tank heaters are a big deal.

anyone have knowledge or experience if heaters come with units?

We had the Arctic Package on our Forrest River Sunseeker, It was just a switch that turned on what I think was just an electric heating tape .Supposedly it was on fresh, grey and black water tanks.  Never had to use it because we always winterized. Good Luck

                         Don