A fill valve assembly for use in a water storage tank including: a tube; an inlet valve assembly supported by the tube and including an inlet valve and a valve lever operatively coupled to the inlet valve, the inlet valve being on in a first position of the valve lever, and being off in a second position of the valve lever; a float constrained for axial movement in a direction along the tube and coupled to the valve lever; and a linkage assembly positioned between the valve lever and the tube and pivoting between a first upright position wherein the valve lever is maintained in the first position and a second folded position, the linkage assembly including a pivot axis transverse to a longitudinal axis of the tube, the float coupled to linkage assembly and constrained from axial movement when the linkage assembly is in the upright position.