Dayton sewage or sump basin covers are designed to prevent the ingress of debris and ground soil into the sewage pit, as well as keep the sewage, gas, fumes & vapours from venting out of the system. These units further ensure that the sump pump inlet is not clogged while still providing a tight seal around outlets and vent pipes. They are compatible for use with basins with a maximum external diameter of 24 inches and feature plastic / steel construction to ensure structural rigidity under abrasive conditions.