Originally Posted by dmtex
I have a A127TH. Located below the floor and underneath the area of the AC is an item I'm not sure of its purpose. Is is a drain? Is it a vent? See the attached photo. Thanks
On mine it appears to be an overflow drain in the event the primary drain tubes that exit to the outside of camper get plugged up. I had the heat pump cover off of mine and you can see that entire heat pump sets in a pan that has this, what appears to be a drain, in it. Not 100% sure that is the only reason but I now know that my floor will never get wet if drain tubes get plugged up because water will run into this pan and out the floor drain. I asked dealer in the past what this drain or vent was for and he said he didn't even know it was there and didn't have a clue.
I want to also clarify there are two pans. There is the metal pan which is part of the heat pump from which the two primary drain tubes are attached and exit to outside. This is the intended drain. The other pan has the entire heat pump residing in it and has this other drain which exits through the floor.