I have sediment built up in my hot water tank. I'm trying to flush it, based on instructions I've found on the internet. I've turned off the tank completely, attached a hose to the faucet drain and shut off the cold water input line. I've also turned on the hot water in the kitchen sink and bathroom.
But...every time I shut off of the cold water line, within a few seconds, the water stops flowing (both to the kitchen/bathroom and to the drain). By turning the cold water on and off, I was able to get a fair bit of sediment out, but I don't understand why I can't get all of the water out of the tank?
Can anyone tell me what I'm missing here?