Hydro Vacuum manhole covers are ideal for maintenance work and preventing the workers from falling in a manhole. They feature 1.5 mm thick, stainless steel construction that offers robustness and resistance to bending during assembly. These manhole covers are provided with a layer of thermal insulation that help in decreasing the effects of hazardous weather conditions. They also feature gaskets on the edge of manhole that are pressed properly after closing to remove odour and facilitate waterproofing. Choose from a range of these manhole covers available in 800 and 1000 inch length options.