Jamie, what kind of tubing was used? Is it clear or translucent plastic, or is it opaque rubber? I'm asking to find out what type of plastic was used, if it is plastic. You say some metal pipe was used- is it shiny silver or black pipe? Does it connect directly to the copper pipe you already have? It sounds like the plumber had to fish his water line through some hard-to-reach places, so using a flexible line was probably necessary.