On my 2306 I have the BT water flush connector on the back side of the TT which allows for water to enter the top of the tank to help flush it out.
I wanted to give a better flush for my BT to clean sensors between outings.
I purchased this wand > Camco 40094
Along with this, I purchased a connector hose, which is to easily connect to the faucet in the bathroom. Well... the faucet is too small and there is no way to attach it.
Sooooooo.... I went under the sink to see what my options were.
I popped into an RV dealer and picked up these parts and tapped into the cold water line. Shown partially assembled.
I drained the water out (to a point as I found out later, keep a rag handy) and cut into the line, made the connections and tested it. One important thing is to remember which way the valve is oriented when installing or you won't have any water flow to the faucet.
I reinstalled the little panel to tidy up that cabinet. I've tested it and it works like a charm.