Abstract: A valve includes a valve body, valve arm hinge and valve piston. The valve arm hinge connects the valve arm to the valve body through a pivoting connection. The valve piston moves linearly in a valve piston channel. When a pressurized fluid contacts a second valve piston end, a force is applied to a second valve piston end. Movement of the valve arm from a first valve arm position to a second valve arm position allows the valve piston to move, under the force applied from closed, to open and allows fluid to flow through a valve channel. The float in the first valve arm position is above the position of the float when in the second valve arm position. If fluid in the tank goes below a critical tank fluid level, the valve arm moves from the first valve arm position to the second valve arm position.