Amtrol boilermate

bill_105

Are there any other ideas on why boilermate indirect water heaters have such a high failure rate? Amtrol's classic series have been a real nightmare here. At one time I was connvinced it was the top O-ring and the brass fitting but now I'm not so sure. Amtrol does advertise a special double O-ring,although I've never seen one. So they have touched on the subject.When they leak you can feel heat at the top at a certain point then the leak occurs at the bottom right below

radioconnection_2

mine is doing just fine so far.. Hope it stays that way...