I bought this for my RV that has a dual Grey/Black water tank, and a separate Grey tank. I'm connecting up all Valterra adapters/hoses, but I found the connection with the rotating bayonet fitting to be a bit loose than what I would like. It easily disconnected if I tinkered with the device too much. When connected, it didn't leak, so recommend is to connect and leave it alone thereafter.
Rating: [4 of 5 Stars!]