Abstract: A sealed valve box assembly includes a valve box lid made of a rigid material, a valve box body made of a rigid material, and an annular sealing gasket made of a resilient compressible material. The valve box body has a central opening in which an annular void is created when the valve box lid is inserted therein with a circumferential row of spaced apart vertical protuberances on the valve box lid. The annular sealing gasket has a circumferential row of spaced apart vertical channels matching the circumferential row of spaced apart vertical protuberances such that the vertical channels on the annular sealing gasket interfit with the vertical protuberances on the valve box lid so as to provide an air-tight press-fitted sealed relationship between the valve box lid and valve box body.