popping noise - not sediment?
My water heater is not quite 5 years old and has been making popping noises, particularly after someone takes a shower or we use hot water to wash the dishes. I know that's supposed to be evidence of sediment build-up, but when my father-in-law helped me flush it, the water came out clear. He only allowed a small amount of water to come out, but he said the sediment should have come out right away, so he assumed there wasn't any, since it was clear.
Could something else be the culprit? Or should I drain the tank completely?
I read elsewhere that sometimes sediment won't come out, if the chunks are too large. If that's the problem, is there a way to break them up and get them out?
We have never flushed this water heater before. We have hard water, so it seems like we probably would have sediment build-up.