Nominal Tank Capacity 1370 Litres (300 Gallons) Dimensions (LxWxH) 1976x1064x893mm 78x42x35 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.