I just got these quick water connects from Amazon this morning,
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
I went right to work installing them. First tried it on flushing the black tank out. Turned the water on at it leaked between the male and female cupling. I then pulled the female piece off and reversed the rubber o'ring. Put it back together and it still leaked. I even double check the connection to my hose and black tank flush inlet. They were tight, as I had pancakes for breakfast this morning.
So what quick connects are being used that work well and do not leak?