Our 2017 has tank heaters for the fresh, black and gray. Not sure what year they started putting them on, but my guess is it was sometime around the 2017 year and forward. In fact my fresh and black are on now here in Albuquerque. Grays are still open, but that heater will be on when I close the valves later in the week.
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Dick, Joyce, Diego, Picatso and Gustav
2017 3720 RL, and 2013 HC 343RL
Pullrite Hitch, IS, Disk Brakes, 3rd AC, Winegard Traveler, Bathroom door mod, Dometic 320, couch for desk swap, replaced chairs, sun screens, added awnings, etc.
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