Air Intake Drain Hose I Assume

[dl_racing427]

That may well be from the air filter housing. 

If so, the duckbill is there to prevent it sucking air into that hose, and to keep out insects.

My Kubota tractor and lawn mower both have similar valves on the air cleaners, and they actually have a centrifugal filter that deposits large dust particles into the duckbill, where I periodically release them with a quick squeeze.

[W7BE_Bob]

I have 2 similar hoses for the front ACs and the rear AC.

The engine air intake is located DS rear upper and has a 1" drain hose, runs down into the DS engine area and there is no insect blockage. The drain hose intake is located below the 6" air intake so in theory no water will enter.

[b_faster]

On ‎9‎/‎29‎/‎2021 at 10:28 AM, tmw188 said:

While having the rear engine access door lifted on my O2 Windsor looking for the source of some water dripping. I noticed it was coming from a very small duckbill attached to a half inch garden style hose. I’m assuming that that is a drain for the air intake Plenum at the rear of the coach for this year model Windsor? The duckbill was clogged with dirt and debris I pulled it off the hose was clogged probably a good inch and a half to 2 inches up inside the hose, once cleared it completely drained out and cleared the hose of water. I’m on a trip returning from the Smoky Mountains. I drove a good day in a moderate rainfall on the first leg of the trip. So my question is is that what that hose runs up to is my assumption correct? From the looks of the debris it seems possible it’s never been cleared. Seems like a good way for the motor to ingest some water if this isn’t kept clear or at least get the filter wet. When my new filter finally arrives if it ever does I’ll be able to inspect the existing filter.

I have similar intake holes in my 2000 Windsor, I have a duck bill drain at the bottom of the ~10" intake pipe that 90's into the filter. My duckbill is ~2" in diameter.  Farm and industrial equipment use similar "water dumps" on air intakes anytime there is a chance liquid can collect.   My John Deere riding mower actually has one.