Keep sediment and other pollutants from entering stormwater drains. Oil and Sediment Model. Keep sediment, hydrocarbons and other pollutants out of the stormwater system. Large sediment accumulation pocket holds up to 18kg of silt, sediment and rubbish as well as 3.5L of oil and grease. Built-in overflow ports avoid flooding in heavy rain events. Sewn-in, lift-out straps make removal easy and prevent the Drain Guard from falling into the inlet. One size fits most drains. Simply lift grate, insert Drain Guard and replace grate to hold Drain Guard in place. Trim excess fabric if desired. Drain Guards are made from a polypropylene geotextile. Dimensions: 1,220mm (L) x 910mm (W) x 460mm (H). Performance: Removes up to 3.5L of oil and 18kg of sediment. Exceeds 75% TSS removal.