Replacement Stainless Steel Spring for the Brower WPO12E, WPO12N, MPO12E, MPO12N the poly, electric automatic waterer drinkers. See the diagram below for the assembly parts for the valve cover.
See B from the Diagram Below
Part A - OF572 #14575 SS Cotter Pin .094" Dia c 3/4"
Part B - OF573 #14573 SS Cotter Pin, 4 1/2" Length
Part C - OF570 #14574 SS Washer .344" ID x .75" OD
Part D - OF571 #14571 SS Spring .48" OD x 1 3/4" L