Drain valve and system

Claim 1

In combination with a fluid holder having a threaded draining outlet, a draining assembly which comprises: a valve housing defining a shallow fluid chamber between a generally flat roof and a generally flat bottom; an inlet channel in said roof leading into said chamber, said inlet channel being shaped and dimensioned to threawdably engage said draining outlet; a discharge channel on said housing leading out of said chamber, the respective axes of said inlet channel and outlet channel intersecting at an angle greater than 90° and less than 180°; at least one resilient gasket placed at the interface between said housing and said fluid holder around said inlet channel, said gasket shaped and dimensioned to allow manual rotation of said housing, reorientating said discharge channel by while sealing the interface between said housing and said fluid holder; a valve seat formed at the intersection of said chamber and said inlet channel; an obstructor, within said chamber, shaped and dimensioned to mate with said valve seat in order to close said inlet channel; means for moving said obstructor from outside said chamber, moving said obstructor in one of two directions, said first direction toward said valve seat and said second direction away from said valve seat, said means for moving shaped and dimensioned not to protrude beyond the major external dimensions of said housing when said obstructor is closing said channel; a detachable means for manually rotating said means for moving, said rotation moving said obstructor in one of said directions, said means for manually rotating not in direct contact with said obstructor; and wherein said means for moving comprises: said housing having a threaded bore in said bottom, said bore being coaxial with said inlet channel; a threaded shaft engaged into said bore, said threaded shaft having an inner end shaped and dimensioned to mate with said obstructor and an outer end including means to manually rotate said shaft.