Description OPW TSM-4842 Tank Sump Medium Bury 42 Inch X 48 Inch Key Features Long-Term Watertight Performance/Strength & Rigidity – one-piece design provides reliable watertight integrity and long product life. Designed to resist deformation under burial and high water table forces. Installation Flexibility – multiple flats provide maximum area for locating pipe entries. Easy Field Height Adjustability – the special ribbed height adjustment design makes adjustments to finished grade, if necessary, quick and easy.