I have been following the instructions on draining my water heater so that I can ensure that the sediment will not build up. I follow the instructions step by step, but the water heater will not drain through the faucet at the bottom of the tank. The instructions tell me to open a hot water faucet somewhere else, and I do. The water comes out of every faucet associated with hot water except the drain at the bottom. I have turned the faucet as far as I can clockwise and countercloskwise. We usually drain the tank annually, but the last draining was in Fall, 1998. I have taken to using a hammer and lightly tapping on the faucet opening or the faucet handle. The purpose is to loosen any gathering of sediment that may have hardened at the bottom of the tank. I am aware that I may break the fiberglass tank, so I am very careful. What am I doing wrong?

I have an upstairs shower which has started leaking. I removed the cieling below it and see moisture around the drain. My thought is that it is leaking around the grout line between the floor and walls and flowing along the shower pan until it reaches the drain hole in the subfloor. How does the shower pan and the drain come together? Is there any way to determine the exact point where the leak is?