What I have always done on RV's if they have a plastic thread is to get a Brass 90° hose fitting and put it on and leave it on. This does 2 things, doesnt wear out your plastic threads and points your hose straight down so there is less stress on the plastic fitting. I use the Camco ones. https://www.amazon.com/Camco-Degree-...6933616&sr=8-2
