Originally Posted by noreenz
just have a grey water and white water tank--this was to the grey water tank.
The gray water spilling into the belly pan ( which is plastic) is not a problem. If it is the Black water tank then the whole belly pan needs to come down or be flushed out very good. Cleaning it out so it won't smell is important.
If we are talking about gray water spillage, and the unit were mine, I would want to cut an Access panel to re-attach the pipe. Since you have the hole in the side, where the pipe was, you should be able to see where the hole can be cut.
Here is a link to a "How-to" on cutting an access panel.
I know these Valves in this How-to are the white Thetford Valves
and you have the Black Valterra
but you get the idea on the access panel. Also, your plastic belly pan has the ridges for strength, and you don't want to cut across the ridges
( only cut the flat surface ) This How-to is dealing with a metal belly pan which does not have ridges.
By cutting an access panel in the belly pan you will be able to reattach the pipe to the tank with a hole clamp. Airstream puts one on there that is suppose to be permanent, but they do come lose from time to time. Once the pipe is back on, you can get some type of galvanized sheet metal and rivets put over the hole to keep the warm air in, and debris out. Don't drill deep and drill into the tank itself.
Also, having an access panel will allow you to replace the valves as they wear out over the years. Replaing the valves this alway easyer and cheaper than dropping the whole pan.
You may share this with your repair guy to see what he thinks.