Rich, I was not able to find an exact replacement for the city water inlet on my
Trillium 4500, which originally had matching white square plastic fitting for the city water inlet, fresh water fill and
electrical power inlet. My solution was to remove the center portion of the original square city water inlet and insert the following product in its place, and it works fine:
Valterra A01-0170LFVP White 2-3/4" Plastic Lead-Free Flange Water Inlet