Prime Products 17-0115 Johnny Chock<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Allows for the continuous flow of water to your holding tank through the unblocked chock</li><li>Assists you when using various toilet rinse tubes to clean your holding tank</li><li>Simply open toilet flush valve with hand or foot and place Johnny Chock in toilet bowl where it will keep valve open</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41Z5HyN88VL.jpg" noproxy>