Javelin, yes, this is exactly the dump valve assemble in our Axis. But, there was no rubber coupling between the 3" black valve and the 3" pipe coming from the black water tank. It appears to me that this junction was just stuck together, with no cement of any sort. I'll look at it to see if a rubber coupling can be added. Not a lot of room where the black tank pipe joins the dump valve but maybe I can get one in from under our unit. Hate to cement this joint because if the blade valve ever needed replacement, would likely have to cut the pipe and add an extension to the 3" black pipe, since it would have to be cut to separate it from the dump valve assembly. The 1 1/2" gray water valve has a rubber seal and collar with 4 bolts that holds it to the gray water pipe. You'd think they'd do the same with the 3" black water connection.
Thanks for your informative reply.
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