Hi Barb - Thank you for the question. Mike is correct, you can use this escutcheon to cover the hole around the water supply pipe; however, you will have to turn off the water to your home and remove the water valve to do so. Or take a peek at a split or hinged escutcheon, Home Depot Internet # 205153761 or similar product. The hinge will allow you to install the product around an existing installation without removal. Measure the outer diameter of your pipe to make sure you get an appropriate fit. Any questions please do not hesitate to give us a jingle at 877-272-7755.