Where do I pour the antifreeze

[tammymcdowell]

Newbie RV owner, and for the life of me I cannot find anything in the owners manual or online that tells me where to pour the antifreeze when winterizing my RV. Does it go where the city water goes? or where the the tank vent is? The owners manual has you put sanitizing solution in through the tank vent. This is a phot of the tank vent and city water connection.

Update:

Thanks all for your replies! I have a 2021 Keystone Outback. I am not sure where the water pump is located, but will look for it today. If its by the water heater, that is up front in the bedroom closet under a floor board, so I'll start there. How important is it do you think to blow out the lines?

Thanks again,

Tammy