Originally Posted by NorthernVandal
I did that accidentally while filling my system and flushing it out, first time user here. I heard water and walked around back to see it open.
My only question is what is the simple process to fill the hot water tank and get it running? Do I just hit the switch inside the trailer and run the water for a bit? Wait 15 minutes and check it?
Install the drain plug or anode rod.
Open the pressure relief valve and fill with water till it comes out the relief valve to purge the air out before you turn it on.
(you may want to get rid of the air in the pipes as well at this time)
After the air is cleared and water runs smooth shut off the faucet and fire it up.