Manhole covers and risers engineered to prevent Inflow & Infiltration (I&I).
Sanitary sewer systems require absolutely watertight access points to prevent environmental hazards and costly water treatment overloads. Our solid cast iron and expandable risers are designed to create a perfect, sealed fit with existing manhole frames, ensuring zero movement under heavy traffic loads.
Machined surfaces for watertight gasket seals.
Engineered to withstand continuous H-20/HS-20 commercial traffic.
Expandable options eliminate the need for concrete mortar beds.
