Pictures of valve and tubing
Here is the picture of the offending fresh water drain valve located between the street side wheels, the location of the drain when looking under the closet, and the valve removed. The drain tube from the tank to the valve is located in the center of the picture below the black electrical tape. The tube uses hose clamps to secure it.
the replacement valve looks like a Camco part #22223 so I will be ordering and replacing asap.
thanks for all your help!
Two Adults, Four Kids, and a Dog camping in an Airstream. We must be crazy!