Quick anti-siphon valve question
Hi valve specialists out there :-)
Quick question. After restarting irrigation system that I had turned off due to freezing temperatures, I decided to try the valves by hand first.
Slowly turning on a valve by rotating the solenoid produced some weird vibrations/shaking which increased if I opened the valve more. After closing and opening the valve slowly enough the vibrations disappeared and everything ran smoothly.
I am guessing the vibrations are due to the presence of air in the system and the anti-siphon?
Would the same vibrations not happen if I turn on the valve using the controller to activate the solenoid?
I have seen the same kind of vibrations with a toilet tank after I connected a new anti-siphon float, and they disappeared after turning on the water very slowly for a few minutes.