Troubleshoot Leaking Waste Valves on our 2022 Winnebago Travato 59KL

Any suggestions for fixing this?
Flushing out an RV's waste tank is a rather unpleasant chore, especially when it is not connected to a RV sewer dump. But for this situation, a visual inspection of the black water waste tank and valve was essential for troubleshooting the cause of the slow leak of sewer into the waste outlet tube. And as you will see in this sometimes-graphic video, the visual inspection followed by manual extraction of stubborn waste debris was necessary. Unfortunately, our thorough flushing of the waste tanks did not solve the problem. Clearly, the black water valve is compromised and must be replaced. But, getting it replaced is another big headache. In our short time of owning a Travato, getting any Winnebago RV replacement parts from the manufacturer through a certified Winnebago dealer is a very slow process. It has been four months since Eric’s RV Performance Center has ordered replacement waste tank valves from Winnebago for our RV, which still under warranty, and they have not yet received them! This is incredibly frustrating!
Background:
During the inspection at Poulsbo RV of our used 2022 Winnebago Travato 59KL, I decided to remove the bayonet cap of the waste outlet. BIG MISTAKE! Raw sewage began to flow out, so I quickly twisted the cap back on. I mentioned this smelly experience to the technician who was inspecting our Travato, and he said that they don’t inspect the waste tanks on used RVs. Well, this seemed rather strange to me, but the Travato was only a year old, so what could possibly be wrong with the waste tanks? Maybe someone had opened a waste tank valve unintentionally or it wasn’t fully closed. Anyway, I was so excited about owning this camper van, I dismissed this as being a nonissue and we continued with the inspection.

[@scotttrainer9704]

Those valves always get stuff stuck in them causing seepage. Always rinse your tanks with clean water after dumping, at least 10gl each and work those valves as you flush the fresh water.
That's what my over fifty years experience has taught me.

[@randallwingett]

Thanks for the tip!

[@toddmckinney1869]

You could glue on a valterra glue on valve