I had to replace a 5-year old A.O. Smith water heater that was installed by Mendel Plumbing & Heating. The water heater started to leak and was covered under warranty. I was quoted over $700 by Mendel Plumbing & Heating to replace a 5-year old under warranty water heater. I called another plumber (R.J. O'Neil, Inc.) who sells A.O. Smith water heaters and they did it for $300. R.J. O'Neil, Inc. is located in Montgomery, IL (630) 906-1300.
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