New seal rings gaskets kit available atwood 96010 should come with new tank if that is way you go.
Atwood water heater tank cracked.
Trailer life and motorhome magazines bob livingston and bill gehr show you how to replace the inner tank of a leaky atwood rv water heater.
I called a couple welding shops and was quoted 20 to patch the screw hole a crack might be 40.
The tanks are so thin that welding a crack isn t likely to succeed.
These minerals calcify and form deposits inside your water heater which eventually causes enough stress to crack it.
One of the primary issues with older water heaters is the buildup of sediment caused by natural minerals in the water.
I d replace the water heater.
It is not expensive.
If you have an atwood and it is functional other than the leak get it repaired.
When i first put a hole in mine i looked for a replacement and was floored at the cost.