Description Soap Metering Valve “L”, 1/4″ This “L” Chemical Metering Valve features a brass body with Viton gland seal that eliminates air leaks. The easy-grip, fluted plastic handle comes with a pointer for precise metering of pressure washer soaps and other chemicals.  Plus, the panel mount design can be used in a 11/16″ or 3/4″ hole on a variety of pressure washers. Cross Reference Numbers: 9.802-188.0, 98021880, 2-30152 We suggest you refer to your manual that came with your machine for correct part number.  If you still have questions, you can call our service / parts department at (800) 846-5157.