Not the anode! It is drain plug per part 29a on pages 33-36 of the manual linked below. I believe this model does not use an anode rod.
https://myrvworks.com/wp-content/uploads/2019/04/Atwood-Water-Heaters.pdf
Which brand of hot water heater do you have? You either need the nylon plug or an anode rod. The manufacture of the hot water tank will define which you need.
To me it looks like you need a nylon plug and not the anode rod.
This model does NOT use an anode rod. The hole is for draining and cleaning. There is a plastic cap you can buy and thread on.
it’s the winterization drain plug. I think it’s 3/4″ and I think you’ll be surprised how easy it is to find the plug. Get the nylon plug. It expands when wet, and you have to take the plug out at the end of the season anyway.
That looks like the drain plug for your hot water heater. It won’t fill or hold water without it. You can go down to camping world and buy a new one or get one on Amazon.
It’s where you would screw in the anode rod, it won’t hold water if it’s not in.
Thread seems to be a mixture of “it’s a drain plug” or “it’s an anode rod plug” or “it’s both”.
I’m curious why a water heater would *not* have an anode, and what the downsides of adding one would be. Sacrificial metals reduct/prevent interior corrosion, can they be a bad thing?
Source: What’s this hole? What does it mean if it’s leaking? Can I buy a plug for it?
