[jnaas2]

What model and brand of water heater do you have, They had some problems with the diptube in some models breaking up into very small pieces and you would find them in the sink aerators. If the diptube breaksdown a sympton will be very little hot water available before it turns cold. The diptube takes the cold water to the bottom of the heater and when its not there the water goes in then right back out. Let Me know the brand and I can check to see if its one they had problems with