Winterizing. Just looking for some clarifications...

You do not want to put any antifreeze in the fresh water tank. You will never get it completely out. Use the hose on the pump and pump the "pink" from there. The hose going the fresh tank to the pump will drain itself ok (gravity). Or when you flip the valve to pump the pink from the bottle, it will let air in and drain back down when switching it over.

Pump the pink from the gallon bottle extra hose on the pump. NOT from the fresh tank.