Nominal Tank Capacity 140 Litres (30 Gallons) Dimensions (LxWxH) 608x761x381mm 24x30x15 ins WRAS Approved Product. Tank is complete with a Sealed Lid, Screened Air Inlet Vent and 25mm Insulation on the Lid and Sides. Note : Tanks must be mounted on a flat level platform supporting the whole of the base.