[RickNewcomb]

I'm on my third dump valve gasket. The dealer has replaced it twiced. The first gasket lasted about three years and the second lasted two years. For both gaskets, he said the rubber gasket was destorted preventing the valve from sealing. He said the gasket looked like it was breaking down. One theory he had that it might be the antifreeze I'm adding during winterization. So, last winter I didn't add antifreeze to the toilet. So far the gasket is still working. Last weekend I still had the woosh sound. But it has only been a little more than a year since it was last replaced. Only time will tell if his theory is correct.