I have a two story house plus a basement. It's an older house and the water pressure isn't that great. I've seen a little crud on one of the screens on a sprinkler timer that's hooked up to a spigot on the main floor. Since I have an outside spigot on the basement. I was thinking about turning off the water to the house and draining the water in the house out the basement spigot. I was hoping this might flush out some sediment and stuff. I'm thinking it might be a good idea to turn off the power to the water heater while I do this. Is there anything else I should worry about? Obviously there will be a bunch of air in the lines, but i don't think that bleeding it will be a problem.