SMS Maintenance Hole (1000)
The SMS Maintenance Hole 1000 (MH) is a modular gravity sewer maintenance hole system with an inside nominal diameter of 1000mm, suitable for depths up to 6m. It's manufactured from a polypropylene base, polypropylene riser sections, access ladders and features a ductile iron access cover. The maintenance hole provides effective surface access for cleaning and inspection equipment while allowing entry by persons.