What is this thing?

Looks like it could be some kind of water catch can of sort. Looks like a drain on the bottom?

Beyond that I have no idea.

Glad I dont have that on my trailer. I'd be taking it apart just to see what it was.

Hurst

 

Looks like a binary explosive device

 

It's a thingamabob.

 

No,no, no that's not a thingamabob. It does not have an electrical connection. It's a thingamajig.


Water separator

 

Easy. That's your circumdiscombobulator.


++ water seperator

 

Another vote for water separator.

 

You don't need it, cut the weight

 

Water separator for an airline in a body shop.

 

That is simply a air oiler. It adds a small amount light whieght oil into the air system not enough to contaiminate the system just enough to lubricate upstream valves or controls. They are found a lot on snow plows, refuse trucks, and roll offs. Any truck that has remote actuated controls that activate hydraulic valves is common to have one of these on it. Basically it lubricates the O-rings on the air activation side of the hydraulic spool valve. Word of warning if you get curious and decide to open it make sure the air system is empty or you will get a face full of oil lol. After re reading your post Since it is on the trailer I think your right in saying its acting as a alcohol injector it would work for that aswell. Not a bad thing to have and use in cold months.