I have this rubber adapter that says its 4" to 3.5.
It connects on the 3.5 side to the plastic pipe opposite end of the bayonet fitting.
The 4" end connect around 3" PVC pipe which is used as RV SEWER hard piping.
I don't know what its call but I did at one time.
Does anyone?
I have one so I could take a pic.
Also, I am in central FL area and still need j wrap.
I AM WILLING to buy used.
Any advice or help is appreciated.
Thanks