SidecarFlip - I am new to RVing and have no friggin' idea what kind of water heater I have and where is heat exchanged. Just checked Tractor Supply website and searched under RV antifreeze. The only thing came up was $3/gallon Traveller brand...which is more $$ than WalMart
Downtheroad - i do not know which kind to get, but even if I got one would not know how to hook it up/use it. So think it would be safer to just pour like 15 gallons in the water system and the rest spread out between drains (galley, bathroom sink, bathtub drain, toilet drain). How many gallons do I really need if not bypassing the water heater?
Trailer is a 2007 Trail Light by R-Design C21BRH if it matters.