littlelulu
I have been looking for a way to simplify emptying black and grey tanks. i.e. not having to detach and reattach. This is what I came up with. First shot is without the back flush in place, second is with it to give the short hose from black tank a good rinse if necessary.
I'm hopeful this will solve the inconvenience. ( I understand the new T@Bs only have one drain.)