I have used a polyurea to coat the interior of our manholes. The thickness is to be 125mils on concrete and 150 on brick. The contractor is saying that his ultrasonic meter will not give a reading over 150mils. And that all his work is over 150mils in thickness. The kit with the meter has...
Has anyone had experiences with concrete manholes that have their section (barrel) sealing rings coming out. This is do to the H2s problem within the linage. I know how to seal the manhole from the H2s. But, what do I do with the seal rings/gaskets that you can see within the manhole?. I...
Has anyone come in contact with manholes that they have had to coat do to a H2S problem. I even have the riser gaskets coming out. If so, has the material/s been tried and reviewed for more than 5 years? I have read that some are failing after a few years. The manhole is 21' deep and has a...
