When replacing my 16 year old RV shower faucet with a new fixture, I really didn’t know what to expect when I started the project. I was also not exactly sure how it came apart. So, to help me with this problem, I ordered a new one from Amazon so I could take a look at the part itself. When I looked at the new part, I noticed that it that it was fastened to the wall by two threaded pipes that went through the wall. Obviously, the pipe had to be fastened from the back side of the wall since there were nuts that fit onto the ends of these pipes. This would mean that I had to access the installation from the backside of the shower wall. The final question was how do I get to the backside of the shower so that I could fasten the faucet? When I looked at the wall on the outside of my shower compartment, the factory had mounted a large dressing mirror on that wall. Guessing that perhaps there was a scuttle behind the mirror; I removed the mirror and found an access panel to the back of the shower. I was quickly able to complete the repair and rehang the mirror. All in all, a fairly easy replacement to make the shower fixtures look like new again.