I am makeing a hot water DHW tank for a friend and went to get a tank at scrap yard. Well they weight it was 248lbs, WOW I thought, it only 57 gallons. I got it home cut top off for coils to go in and seen the walls are 1/4 thick. Just other ones I made out of 120 gallons were alot thinner.Heck I should have made a boiler out of it.