How to Seal an Old Well September 1, 2017By Katie Buckley Training Videos abandoned well, video 0 This video, developed for 2017’s Protect Your Groundwater Day “Cap It, Plug It” theme, explains the process of properly sealing an abandoned well. The sealing took place during a public demonstration event on August 9, 2016 in Macomb, IL. Visit the National Groundwater Association to learn more about this annual event. Click here to sign up for our free well care e-course. Comments are closed.