Roger -
The reason you can't get to this discussion is that it is in the Sponsor's section, and your trial membership ran out long ago. You might consider becoming a Sponsor - it is cheap, it pays the expenses of the board, and it gives you full access to everything for a year.
For details, go to the entry page for this board at
www.trailmanorowners.com, and read about Site Sponsorship. There is a lot of discussion about winterizing, and also about the sacrificial anode. As it turns out, you'll spend less for Sponsor status than you will for antifreeze if you try to do it via the anode rod.
Bill