Help in identifying this device on motorhome roof

[Ybfct18]

We have had our Renegade Villagio since 2015 but learn something new about it every year - for the better. The device shown in the photo has us stumped as to what it is. Does anyone know? Thank you.

 

[MapNerd]

Looks like a drain vent

 

[Neal]

Periscope?

 

[Ybfct18]

Looks like a drain vent

It is above the bathroom. So a sewer vent?

 

[redbaron]

It's a drain vent venturi device, designed to suck gasses out of tank.

 

[MapNerd]

Periscope?

He must have a U-Aire

 

[SaltyVetAdventures]

Yep, as someone else said, it's a sewer vent designed to suck the gas out of the tank.

 

[dave sunstar]

it,s a silent deer repeller......

 

[FL-JOE]

Those vents have been around for a long time. Not sure it they vent tank odors better than the standard round ones or not, but they look cool.

 

[bpaikman]

Fishing rod holder.