At our previous residence here in Ft. Myers, we had 4 hot water tanks that had to replaced within a 7 year time frame.
We have since moved to a new house in 2011, (Different brand hot water tank) and as of today we have had to replace 2. Today will be the third one.
The common denominator:Both houses had a hot water recirculating pump installed. There can be no doubt that the pump has effected the "rod", and
as a result, caused the tank to leak. (major)
Fortunately this is covered under warranty, but plumbers should be aware of this serious problem.
Hope this hepls anyone thinking of getting one of these recirculating pumps.
BTW; Pump went on for 4 hours in the AM, and 3 hours in the PM.