The hot water heater tank failed on New Year's day and it took 8 days to put a new one in place. The tank was covered by warrant. I have a question though. Four years ago when the tank was installed the entire cost wa $3,100, including the tank which was about 1/2 that cost. This replacement , with a free, under warranty tank, cost $3,100? I would appreciate an explanation for the cost doubling in 4 years.