Sooo Since I bought my 5th wheel, the black water valve has had a slow leak. Ordered new valve, took out the def valve, the seals were not installed correctly. Well, WTH, no way to install the new valve without cutting two PVC pipes, and then having to repair the cuts!!!! Those designers could use some learning IMO.
Those designers don't care, you bought into it and now it's your problem. In the mean time they moved on and prolly don't even remember designing it like that.
If engineers had to fix things, the world would be a better place