Have to remember the manual probably covers several different versions of equipment. Some of it will pertain to your equipment and some of it probably will not. I believe all Atwood tanks are made of aluminum and do not have the anode rod.
2010 Jayco Quest G2(SOLD)
2014 Jayco Eagle 33.5RETS
2007 Ram 2500 5.9L Cummins(SOLD)
2015 Ram 2500 6.7L Cummins 4WD