There’s a simple reason to take steps to prevent inflow and infiltration into sewers: It’s an expensive problem that has affordable solutions. Manholes are often the most common source of infiltration, as when the grade adjustment (chimney) area begins to deteriorate, they can virtually serve as a sieve, allowing inflow to flow freely into sewer systems during wet-weather events. It simply doesn’t have to be that way, though.
The Infi-Shield Uni-band from Sealing Systems is an inexpensive and permanent method of externally sealing the grade-adjustment ring area of a manhole. The one-piece molded seal has a reinforced, preformed L-shaped corner. Accommodating
