(Patent # US 6,986,226 B2)
The I / I Barrier is designed to stop water from leaking into your Manholes through the grade rings. Many tests have proven that an excess amount of ground water is being infiltrated in through septic systems, which causes more water to be processed in the treatment plants. This in turn costs municipalities more and more money when it rains or when the snow melts. The I / I Barrier is made of polyethylene which is weather and puncture resistant. The I / I Barrier forms an interior wall that stops water from infiltrating into the manhole.