Washroom roof vent on 3200 ?

[xtanker]

Was wondering if anyone knew which vent pipe on the roof is for the washroom ( or how to figure out which one is ) .. I have two just forward of the antenna and one over garage. I'm trying to add a Cyclone RV holding tank vent to the washroom vent.

Tks in advance

 

[MTK1946]

Black tank or gray tank vent? Why not just put one on each.

 

[xtanker]

Black .. they put the two vents so close together that they cylcone's would hit each other ...

 

[hddecker]

Black .. they put the two vents so close together that they cylcone's would hit each other ...

The black vent should be right above the toilet, but if you dump some deoderizer in the toilet, then check the smell on the roof, it'll tell you which one it is for sure.