A valve assembly comprising a valve housing, and a valve body. The valve housing having a lower end and an upper end. A valve seat is positioned therebetween. The valve seat being inclined inwardly toward the lower end. The valve body is pivotably positionable within the valve housing, and pivoting between a first closed orientation and a second open orientation. The valve body is pivotable about an axis that extends through the valve housing positioned between the upper end and the valve seat. In the first closed orientation, the valve body is configured to translate toward and away from the lower end of the valve housing.
