Rubbermade backs up their life time gaurentee on their water tanks. I had a 300 gallon tank that was old and used when we bought the farm. It had a number of cracks in the bottom that allows leaked just a little. A friend of mine told me that they would replace it for free, no prorating, no questions. I hauled it into one of the places in town that sells them, they looked at it and saw the cracks, pulled it off the ruck and slid in a new one. No fuss no bother. Sure beats the metal ones rusting out.
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