Roof Vent Cap Missing

[glenalt]

Yesterday I discovered that the vent cap on the refrigerator/furnace side of the coach is missing. It must have blown off while on the trip because it was there just prior to leaving. I don't know what it vents.

It is a 2" white pvc vent. I wasn't sure I wanted to baggie is if it was a vent for an appliance but I don't want water getting into the appliance either.

There is another one on the other side of the coach that I'm sure vents the tanks but just now sure about this one.


My question is this. It's raining and what will it damage from not being covered and should I put a baggie on it until I can get one. I'm not running the furnace but am using the fridge.

Do they sell just the cap or do I need to replace the whole assembly that I have to reseal?