Two questions here MHC 2017 model 310RE
1) went to drain my water heater and found a plastic plug And no anode is this typical for dealer not to supply one?
2) my Owners manuel is useless basic info only.I want to blow out my water lines should I use the freeze guard port or the city water port? And which port to add antifreeze. Also there is a winterize valve to the right of city water should this be on when adding antifreeze and blowing out lines?
Added pictures of convenience center
Thankyou in advance for any advice
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