Does anyone know the trick about draining the hot water tank? Most of these things build up a bunch of calcium crud on the bottom of the tank. Connect a hose to the nozzle on the side of the heater and run it outside and turn the faucet thing on. You'll see what I'm talking about. It's calcium sediment. After you don't see any more crud coming out, let the tank fill for a while and repeat. I'll do this a few times until the water runs clear. It helps keep the water inside the tank clean, and probably helps the tank last longer. Can't hurt anything.