To most homeowners, plumbing is a little bit mysterious. Pipes are mostly concealed behind walls or under floors, or they’re in out-of-the-way locations. You probably don’t even know all the materials that the pipes are made of if you have an older home.
Even if you could see the outside of pipes, you certainly can’t see the inside of them. Are things working the way they should? If not, what is the problem? Where is the problem located? How could you possibly know? Video pipe inspection is an amazing modern plumbing innovation you should know about.