As a homeowner and a retired hard rock miner that spent most of his life working in the deepest mine in the eastern seaboard repairing and rebuilding mining machinery I hate seeing this happen.
I heat my house with rice coal and pressures of 4-12 PSIG and it works fine and I have all the domestic hot water I need from September to the end of May when I fire up the coal stoker early.
The dead men proofed and proved simple effective plumbing for heating a multi story home and All I can do is shake my head when the laws of physics the dead men used to everyone's advantage are not taken advantage of.
Seeing that tank ripped shames the dead men and all the good things they did to provide central heating.
Its just like Dan says in his books; the tank just sits there and does its job with no moving parts; and this one had an air charge in it since it was plugged off at the top.