A similar problem exists with the fire pump on floor 23 (see Section 11 - Issues and Deficiencies on the Fire Pump at Floor 23). In Section 11 Fire Ready is recommending that the fuel tank on floor 23 be replaced as well. The new tank for floor 23 should be at least 470 liters. Therefore the 500 liter tank from level B4 can be used on floor 23.