I have the electric water heater that was removed (went gas) just before I moved in to this house a year ago. During the last part of the week that ends with August 13th 2010. I intend to put this water heater to use for some temporary showers I intend to put up for some visitors on my farm's lawn. I have the connections from the water heater to the 2 shower heads figured out, I have hydro and water feeds figured out, I am going to run a 220 volt "extension" cord from my house out with a 31 foot outdoor cable. The only thing I do not know is what line (cold water intake or hot water outlet) goes to this fitting pictured, it is on the very bottom, on side of water heater? The only other pipe on this comes out of the top dead center of the heater