Your chance to laugh at me now I have a client w/ the old Rainbird valves that are compatible with the Hardie HR-1 bonnet/diaphragms. I do not know the model number..please forgive me. Anyway, he had bad diaphragms...imagine that, I convinced him to change all of them as his manifold is in a small tight area and built w/ copper.....and it was April 1st and I did not want to dig as I had 10 other places to start up that day. I digress.... 2 of the valves leak when they run....they are fine when they are not running, but while operating they leak under the bonnet....and fill up the box. WTF? Never seen this in all my years. Screws are tight.... Replace them I suppose eh? What am I missing.?