a valve assembly for dispensing liquid from a container . a manifold includes a first channel extending downwardly from a first inlet to a first side outlet , and a second channel extending downwardly from a second inlet on the manifold to a second outlet . the first side outlet and the second inlet are located on the same horizontal plane in reference to the longitudinal axis of the manifold . an elastic membrane sheathed around the manifold extends over the first side outlet and the second inlet . external fluid pressure causes the membrane to expand under fluid flow to provide for fluid communication through the manifold . in alternate embodiments fluid pressure flowing through the first and second channels causes the elastic membrane to expand enabling fluid communication between the first side outlet and the second inlet . a sealing sleeve extends around the elastic membrane is movable from a first to a second position .