My Granita Seal - Rear Tank This seal is responsible for preventing leaks from the rear of the bowl. Ensure both your seal and the silver part of the drum (where the seal sits) is kept completely clean. The easiest way to do this is run your fingers around the drum completely to ensure surface is smooth and free from any build up. SKU: 9604224027 Material: Rubber Colour: Red Width: 180mm Length: 180mm Depth: 20mm Position Number: 27 Part Number: 150300004A