I was requested by the City watter system to change my Sprinkler Air Vacuum breaker with Pressure vacuum breaker.
Why would the last perform better than the air vacuum breakers? The City clerk was not able to explain me the reason of the request?
This change would cost me close to 100$ plus the time to do it.
Would replacing the regular sprinkler valves with ones that have Antishiphon valves do the same result as changing over to Pressure Vacuum breaker valves?