Thanks for the quick reply! That's awesome! So you completely did away with your heater. I can't do that over in Eastern WA, it does get quite cold here in the winter. Any how, sorry for my ignorance, but are you saying it is safe to remove and plug the fitting I have circled? I will also do away with the tee in the heater hose and replace with a straight coupler, or just replace the whole hose with a 1 piece unit.