Cast Iron Foot Valve Replacement Leather Flapper Weight Water Well 3" x 5" 145N. HERE AN NEW OLD STOCK WELL CYLINDER FLAPPER VALVE WEIGHT. YOU ARE PURCHASING THE WEIGHT WITH MOUNTING SCREW LEATHER. THE LEATHER IS INCLUDED IN THIS LISTING. THIS PART IS USED IN THE CYLINDER AS PART OF THE CHECK VALVE FUNCTION. IT CREATES A WEIGHTED HINGE EFFECT ON THE CHECK VALVE LEATHER TO ALLOW WATER INTO THE CYLINDER ON THE PUMPS UP STROKE AND TO KEEP WATER FROM ESCAPING OUT OF THE CYLINDER ON THE LIFT VALVES DOWN STROKE.