I have a 3 1/2 yr. old Reliance Water Heater. Model #54020Rs960, Serial #J96373516. Recently we replaced the heating elements. Ever since we replaced them the T&P valve has been leaking. We have already replaced the T&P valve twice thinking they were bad. Is it possible that the new heating elements are causing the problems? We have the thermostat set between Hot & A. I had it lower but the water was not hot enough. The heating elements are the same wattage which are 4500, but the heating elements themselves are longer than what we took out. Could that be the problem?