I pre-made these valve assemblies so I could poke them through the wall hole onto those elbows. There was no way for my expander tool to get into the cabinet to build these things up from the wall, so I did them out in the open. The escutcheon plate is a deep one that fits onto the valve, and then you expand the tubing and push it on inside that plate. I cut the tubing a little long so I could cut it to fit later.
Here, I am holding the tubing up against the drywall so I can measure where to cut it.
These special tubing cutters work extremely well.
I put a white expander ring onto the tubing. These rings help apply extra force against the fittings to keep the joint water tight.
And then I used the expander tool to stretch that tubing so it will fit on the elbow.
