Plumbing for a Pedestal Sink
When you install a pedestal Lavatory, the plumbing is exposed, so you should make it look clean and presentable. The copper stub out should be cut off at one inch. This will accommodate a standard escutcheon trim ring and the valve will seat perfectly on the pipe and tight against the escutcheon trim ring. No copper pipe will show between the valve and the escutcheon trim ring.
My friend Bob, who is a master plumber, taught me to use tri-flow spray lubricant, when installing valves. You spray it on the pipe, ferrule and inside the valve before tightening. Tri-flow keeps the valve from leaking and you don't have to over-tighten the nut, which causes the ferrule to cut deeply into the copper pipe. WD-40 works also, but not nearly as well as Tri-flow, which contains silicone and helps to create a good seal. I also use quarter turn ball valves, they do not restrict the flow of water, like a gate style shut off and they are so much faster to turn on and off. They cost just a little bit more, but are well worth the difference in price.
The waste line uses a short sanitary tee in the wall and the trap adapter is glued tight to the fitting. The wall is framed with two by fours, so the adapter sticks out a little too far to cover with one escutcheon trim ring, so I had to use two (see in the photo above) . The back one is still missing screws in the picture, I just have to locate a couple of chrome plated bugle head screws to fill in the holes and it will be complete.
Posted by The Cranky Codger