Glass lining in a water heater tank

It indeed is glass lined, hep'd prevent rust. Yer gonna wanna remove that cause heat an cool cycles is gonna crack an chip it an will be fallin on yer food all the time.

Never tried removin it, but I'd guess if ya heated it up an sprayed the glass with a hose it might come outa there. I'd be mighty carefull an wear some eye pertection cause it gonna go everwhere.

Good luck.

Its gotta come out. I would burn out the tank several times to see if that will loosen it for brushing out, or it might actually burn it out itself. I've made some wall tents stoves out of these tanks, and just burned them good outside after construction, not had much trouble. You will have to remove any of the glass that is in any area that needs to be welded or it will foul your weld.

The porcelain lining is a very tough baked on coating and you will not be able to easily remove it, even using an angle grinder. Normal cooking & smoking in the unit will not cause it to separate from the metal. The reverse flow smoker I made I tried to burn it out even used the cold water cooling to try and separate it and it didn't budge. I had a very difficult time grinding enough of it away just to get to bare metal for welding. I would not worry about trying to remove it. You will find that it is more of a benefit by keeping it. First off, it helps prevent heat loss, particularly important since water heater tanks are thinner than the more commonly used propane tank. Second, it will prevent your firebox and cook chamber from rusting from the inside out. Fire and rust are both forms of oxidation (rust) and fire will rust from the inside out, the coating will protect it and it will last for decades.