anti-siphon

I'd like to hear pros and cons of installing a new anti-siphon antifreeze exterior faucet on the side of my house. My current faucet leaks, and the hose bib also leaks, so that water continually drips from my garden hose. I was going to replace both the hose bib and standard spigot, but then I...

Greetings, See images attached. I need to find a replacement for the vacuum breaker shown. It has male fine threads on the bib side, standard male garden hose on the other. I don't have this part anymore, it was accidentally discarded. I don't know what the fine thread is, 3/4" NPT was too...