When I saw the PRO-RING manhole repair system at the 2010 Pumper & Cleaner Expo, I had a strange experience. I saw a stack of black rings of various thicknesses that from a distance of several yards looked like cast iron. Yet people in the Cretex Specialty Products booth were lifting them with one hand to show them to attendees. All right then, I said to myself. These are plastic foam models of the actual iron rings, made specifically for trade show exhibit purposes. Wrong. Those were the actual products. The rings come in a series of components that combine
