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.