Originally Posted by Brownie
Drained out the pink stuff and closed the low point drains, dumped in the detergent and filled the fresh water tank. Next, I put in the WH drain plug and turned the three valves on the WH bypass to allow the solution into the water heater.
Since you don't drink the hot water and because it will be heated to 140 or higher before you use it, there is no need to sanitize water heater. When you winterized the water heater you drained all the water out of the water heater. So little if any water remained by spring.
Filling the water heater with detergent or pink stuff will take for ever to get out of the water heater since it will be mixed with and diluted by the incoming water but not cleanly flushed out.