An animal watering valve preferably includes a valve body, a valve stem, a retention plug, a stem o-ring and a compression spring. A valve bore is formed in the one end of the valve body to receive the valve stem. A plug bore is formed in the opposing end of the valve body. The valve stem preferably includes a sealing base, an actuation end, a plug end and a spring flange. An o-ring groove is formed in the sealing base to receive the stem o-ring. The retention plug preferably includes a threaded portion, a rotation flange and a stem portion. A stem bore is formed through the retention plug. The stem bore is sized to loosely receive the plug end of the valve stem. The plug end is inserted into the compression spring. The retention plug is threaded into the plug bore to retain the valve stem.