A valve assembly comprising: - a valve housing , the valve housing having a lower end and an upper end , with a valve seat positioned therebetween, the valve seat being inclined inwardly toward the lower end; - a handle having a lever arm on the outside of the valve housing and a shaft extending through the housing , the shaft defining an axle member at a second end thereof, - a valve body pivotably positionable within the valve housing, and pivoting between a first closed orientation and a second open orientation, the valve body pivotable about an axis that extends through the valve housing positioned between the upper end and the valve seat , characterized in that in the first closed orientation, the valve body is configured to translate toward and away from the lower end of the valve housing , as the valve housing has a valve axle slot opposite the axle member and as the valve body includes: - a first axle protrusion extending from the valve body and into the valve axle slot , such that * the first axle protrusion is rotatable within the valve axle slot and * the first axle protrusion is translatable toward and away from the lower end within the valve axle slot when the valve body is in the first closed orientation; and - a second axle slot , with the axle member of the handle member extending into the second axle slot , the second axle slot configured to * impart rotation of the valve body upon rotation of the handle, and * to allow translation of the valve body toward and away from the lower end when in the first closed orientation relative to the axle member. - a valve housing , the valve housing having a lower end and an upper end , with a valve seat positioned therebetween, the valve seat being inclined inwardly toward the lower end; - a handle having a lever arm on the outside of the valve housing and a shaft extending through the housing , the shaft defining an axle member at a second end thereof, - a valve body pivotably positionable within the valve housing, and pivoting between a first closed orientation and a second open orientation, the valve body pivotable about an axis that extends through the valve housing positioned between the upper end and the valve seat , - a first axle protrusion extending from the valve body and into the valve axle slot , such that * the first axle protrusion is rotatable within the valve axle slot and * the first axle protrusion is translatable toward and away from the lower end within the valve axle slot when the valve body is in the first closed orientation; and * the first axle protrusion is rotatable within the valve axle slot and * the first axle protrusion is translatable toward and away from the lower end within the valve axle slot when the valve body is in the first closed orientation; and - a second axle slot , with the axle member of the handle member extending into the second axle slot , the second axle slot configured to * impart rotation of the valve body upon rotation of the handle, and * to allow translation of the valve body toward and away from the lower end when in the first closed orientation relative to the axle member. * impart rotation of the valve body upon rotation of the handle, and * to allow translation of the valve body toward and away from the lower end when in the first closed orientation relative to the axle member. <EOS>