Antifreeze recommendations

Kostyan wrote:
I took pictures of water heater and plumbing, once figure out how to post pictures on this forum will post them here

Trailer came with Atwood water heater originally but was replaced by prev owner. There are no markings anywhere telling me what the current make model is

When you saying connect to city water and blow the lines out, what exactly do you mean? Does connecting to city water somehow clears lines or i have to blow air through pipeswhile running city water?

It's still an Atwood. Suburbans have a different burner assembly.

You don't need to blow anything, though you can get a Camco blowout plug that connects to your city water inlet as some do (blow out the system with low pressure compressed air) but pumping in RV antifreeze via the hose that lays next to your water pump is the easiest way to winterize and, you can blow out and pump in if you want to. Just be sure you winterize your outside shower and be sure to turn off the valves and not turn it off via the button on the shower head (that applies to the inside bath shower as well.