TN 1040899 / 4044442 Pressure Wash Rocker Switch for Tennant. This is a console mounted rocker switch for models that are equipped with the optional pressure washer kit found on Tennant M20 and M30 riding floor scrubbers. Priced Each. Replaces Tennant 1040899 / 4044442. Our Part Number TN 1040899 / 4044442