Why don’t the Grand brewers have graduated liter/cup markings on the cool water reservoir?

The Grand models were designed for cafés, small offices, and home entertaining, producing 1.8 L of coffee per brew cycle. To achieve this quantity, we use a flat-bottom, commercial-style brew basket. To brew to the Golden Cup standard, this style of brew basket must have a sufficient coffee bed depth and water ratio to assure essential saturation and extraction.