[quote=scott69]the pvc valve on the end of the pipe is just a backup in case the main valve was to go bad. in the second pic you can see a black corrugated pipe sticking up about a foot above the ground. the main valve is down in it. it is kind of underground. i keep a piece of plywood over the top to keep rain out of it and to keep it from freezing. i figured adding the 4" pvc valve on the end of the pipe was cheap insurance in case the other one failed.


A wise man at work there !! I will never put a valve on the water side of the dam. Back ups and careful thought should go into any water control system - failure is not an option !!!