Winterized my travel trailer last November. Due to health reasons, I was unable to use my trailer this season. Wondering if the antifreeze will be good for another Winter, or should I flush the system...
Good quality anti-freeze? I'd not worry about it, but cheaper ethanol based AF is likely to evaporate. In that case, I'd dump more in the drains to fill the P-traps, to ensure no smell comes up from gray tanks.