Water heater tank

How do you fill the hot water tank when you de winterizing it? 

All this assumes we aren't talking about flushing antifreeze from the system.  If you are using your fresh water holding tank, fill it first.  Turn the pump on.  If you are using a hook up, hook up and skip the pump.  Then turn on the cold water at the sink and the shower to purge the air out of the lines.  Do the toilet too.  Turn off the cold water and the pump.  Replace the anode in the water heater if it is out.  Set the valves at the hot water heater for summer usage; top and bottom valves open, middle valve closed.  Turn the pump back on and turn on the hot water at the sink and the shower until it runs water with no air.  Top off the fresh water tank if you are using that and turn off the pump.  Done.    

Note that with the pump switch on, the pump still only runs on demand.   If, when the faucets are turned off, the pump still cycles off and on, you need to check for freeze damage to your plumbing.

TT

Originally posted by furpod As far as flushing anti freeze.. there shouldn't be any in the HW tank. That is the whole, and only,  purpose of the bypass valve system.