Which vent is the black tank vent?

[BobinICT]

2450RL. I've got two black vents, one just behind the bedroom vent and one about midway of the trailer. There's also a white larger lower profile vent as well. Want to identify the correct one because I want to install a Cyclone. TT is winterized currently so I'm nor sure if a sniff test would be productive. I do have two grey tanks if that helps. Thanks.

 

[NB Canada]

I believe the larger white one is an attic vent but I am not positive. Not that that helps you much


2021 Imagine 2400 BH
2018 GMC Sierra 4x4 crew

 

[Bungy]

2450RL. I've got two black vents, one just behind the bedroom vent and one about midway of the trailer. There's also a white larger lower profile vent as well. Want to identify the correct one because I want to install a Cyclone. TT is winterized currently so I'm nor sure if a sniff test would be productive. I do have two grey tanks if that helps. Thanks.

It is very possible (even likely) that two or more tanks are connected to the same vent.