Nominal Tank Capacity 410 Litres (90 Gallons) Dimensions (LxWxH) 1345x672x572mm 53x26.5x22.5 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.