Hope you let water heater cool way down before filling it with water....
Atwood uses an aluminum alloy tank...it can take the heat
Suburban uses a steel glass-lined tank. Porcelain could have spider web cracks which will cause issues later on from steel tank rusting
Electric element....they need to be submerged in water. They burn out quickly if run dry
Propane operation......most likely was shut down by high temp t-stat opening (180*f)
PRV....increase in pressure from air heating and the hot air caused it to fail
Got overheated. Best that you replaced it.
Always check that water heater is full before turn it on.
On Edit: Oops...maybe I shouldn't have posted :S
