Abstract: A valve selectively dispenses noncompressible fluid from a pressurized source into a receptacle. The valve has a body with a valve spool slidingly retained in a hollow cylinder in the body. The ends of the body are communicated by an internal channel, the first end adapted to engage the source and the second end adapted to engage the receptacle. The hollow cylinder is an intermediate part of the internal channel. The valve spool has first and second enlarged portions that effectively divide the hollow cylinder into first and second noncommunicated chambers. When the valve spool is in a closed position, the first end is communicated only with the first chamber and the pressure of the fluid in the first chamber provides an outward biasing force on the valve spool, keeping it in the closed position.