Donna;  Thanks for sharing your automatic chicken watering system. I am now keeping 24 pullets and 6 guineas. (Roosters are prohibited in my town.) I can trade extra eggs for fruits & veggies at the farmers market two blocks away. I liked your backyard farmer oriented Freedom's Phoenix Magazine recently. But I noticed your project article dealt primarily with the tank and tank stand, and gave precious little info about that critically important ball valve. But you are a great lady and Ernie is fortunate to have you. Keep up the good work!