Monster Industrial Manhole

Make Installation A Breeze With Monster Sewer Manholes

The Monster Industrial Manholes are pre-fabricated sewer manholes with a sewage grinder which are fully assembled and ready to install. These fiberglass manholes are an excellent solution when a sewage grinder is needed but there is not enough room for conventional installations. These pre-fabricated fiberglass manholes with sewage grinder are easy to install – just dig down to the sewer line, create a concrete pad for the fiberglass manhole unit to rest on and tie in the sewer lines. That’s it, you are grinding sewage and protecting pumps! Perfect for prisons, hospitals and nursing homes that need to grind-up rags and trash in the sewage before it enters a municipal wastewater system.  Designed to fit almost anywhere and provide complete sewer pump protection.

The Monster Industrial Manholes are customizable to fit your exact site requirements.  Options that can be specified include the exact depth required as well as the inlet and outlet pipe diameters.  Additionally you have the choice of top cover designed as an above ground hatch or one able to handle vehicle traffic.  Finally you can also add options to the 3-HYDRO industrial grinder included in the system such as Wipes Ready Technologies which are specifically designed to shred down rags, wipes, diapers and other disposable items that commonly clog sewage pumps.


  • Avoid municipality fines for discharging pump clogging trash in sewage.
  • Stop emergency plumbing repairs.
  • Pre-packaged systems avoids costly civil construction work.
  • Ease of maintenance with semi-annual inspections.


  • Factory installed guide frame and access ladder makes it easy to access the grinder.
  • Customizable depth, sewage pipe size, and cover type.
  • 3-HYDRO sewage grinder effectively grinds rags, wood, plastics, and other debris.
  • Wipes Ready® Technology available which prevents materials from forming long strips and reweaving in the waste stream.
  • Includes PLC to control and monitor operation of system.


  • Dimensions: 4 ft (1200 mm) diameter, ½” (12 mm) wall thickness.
  • Fiberglass Reinforced Polyester (FRP) construction.