ok, i'm trying to take your advice. I decided the easiest way to do it was to buy an addition hose.
So the hose plugs into the water supply on one side, and the toto conect junction connects to the water hose on the 7/8 inch side. The other side of toto valve is also 7/8th inch (which would typically attach to the toilet fill valve). To make it work, I would need a connector (don't know the word) that connects the 7/8 inch side of the toto valve to the 1/2 inch hose (the hose that is still connected to the toilet. Does such a product exist?
water supply ---> toilet hose ---> toto washlet connect junction --->additional toilet hose --->toilet fill valve
I need something that connects the connect junction to the additional toilet hose.
Does this make sense?