One of my outside faucets has a Muellar #888-183 AntiSiphon Vac Breaker. It looks like a simple enough mechanism but I cannot get it to stop leaking water from the air vents. I have tried replacing it and the same thing happens. This was not happening before and only began to leak after I disconnected a nozzle from the attached hose to the faucet.
What should I be doing.
Thanks for a reply.