My son has a 2010 21' Rockwood Mini. We winterized it on Sunday and I was impressed with the Winterizing Hose Connection on the outside of the trailer. This connection allows a standard hose to be connected and the cut end of a 4' hose (cut from an old hose) when placed in a gal jug of antifreeze, draw the solution into the system. There is, of course, a valve to turn in the pump area which switches the suction from the fresh water tank to the Winterizing Hose Connection.
Now the reason this "puzzles me" is not that this exists and works perfectly. No, I'm puzzled because my 2016, 33' RKX Wildcat MAXX, which cost twice as much as his Rockwood, does not have this feature. There is absolutely no provision for getting antifreeze into the system other that adding 2-3 gal to the fresh water tank OR, disconnecting the inlet hose from the fresh water tank to the water pump and attaching a home made replacement hose that can then be run to a gal jug of antifreeze.
I mean, give me a break, this can't be a $25 (parts/labor/overhead) accessory if installed during the production phase. This is my second Wildcat Maxx and the first one was void of this connector also. So, after owning 2 Wildcat Maxx TT's during the past 3 years, I've found the first thing that really puzzles and disappoints me!!!