I built an adaptor as described, it worked great! Thanks for the inputs. Now I have another question/issue. It send that the gray water tank capacity on my hw296 is low our there is a leak. If I keep the valve closed, in a short period of time running the sink, water starts dripping under the trailer. I have not crawled under looking for leaks our cracks. Is this normal for the gray to leak, is this an overflow mechanism?