I have a new camper and It has a black flushing connection, never has a camper with this feature and now I was wondering what is the purpose of the black flush
If you use you trailer on a regular basis there is no need to get it " surgically" clean . What difference can it make unless you are putting your trailer away for a month or so . My sister will spend a hour getting it perfect , as soon as she is satisfied her husband will go read a novel sitting on the pot doing his business . Does she need to clean it again ?