What is the minimum size for a floor drain that must have a removable strainer?

The minimum size for a floor drain that must have a removable strainer is 2 inches. This requirement is established to ensure that the drain can effectively handle both normal wastewater flow and potential debris that may enter. A removable strainer allows for easier cleaning and maintenance, which is crucial in preventing clogs and ensuring proper drainage. In plumbing code, setting a minimum size of 2 inches helps facilitate adequate drainage capacity, reducing the risk of flooding or backup in areas where floor drains are commonly installed. This standard reflects the need for efficiency and functionality in drainage systems, particularly in commercial and industrial settings where higher volumes of water may be present.