Monster Industrial Manhole - Brochure

The Monster Industrial Manhole (MIM) makes it easier to install a grinder in sewage. lines. This fiberglass reinforced polyester (FRP) manhole has the exclusive Monster. Industrial HYDRO grinder that shreds troublesome solids and eliminates costly. pump breakdowns. The Monster Industrial Manhole option makes for a quick. installation. Simply dig a hole and lower the prefabricated fiberglass manhole into. position in gravity fed sewer lines.