Installing Bathroom Faucet Shut off Valves - Plumbing Tips In this video you will learn how to install a bathroom faucet shutoff valve. If you notice there isn't a bathroom cabinet, so that we can get a nice unobstructed view of this area. This video should give you a general idea on how to install a water shout out how with a compression fitting onto a copper water pipe. Make sure that you watch some more of our helpful videos on remodeling. We're here to make your remodeling projects a little easier.