A valve body structure of a valve device comprises a sealing surface, and a venting surface defining a ventilation relief opening through which air can flow from inside of the valve device to outside of the valve device. The valve body structure also comprises a number of retaining surfaces positioned between the sealing surface and the venting surface. The retaining surfaces cooperate together to (i) secure in place a rubber washer that allows air from inside of the valve device to flow around the rubber washer to outside of the valve device when air is flowing through the ventilation relief opening from inside of the valve device to outside of the valve device, and (ii) prevents debris from outside of the valve device from reaching the ventilation relief opening.