I have a cracked flange on the tank side of the grey water gate valve. I have looked over the rest of the Sami dump system and it looks ok. I think I’ll need new seals also. So I’m thinking I can just replace the valve body and the outside hub. I will have to do a little abs plumbing also.
It looks like the previous owner has changed the black water valve. I just learned that the whole assembly rotates. I always cursed the manufacture because it didn’t drain well.
If it were mine, I would cut off that entire elbow back far enough to put a slip fit and pipe into to the other end to maintain the proper length. That won't be fun, but at least it is ABS plastic and easy to cut. Use one of one handle hack saw blades. Looks like you may have a long 90 elbow not a short one. Simply put your new valve assembly into place with the 90 to verify the length. Then glue.