Watts 8 backflow preventer on hose bib

[coffeesnob]

I did not install these and now one is leaking. How do you remove it from the hose bib? Was thinking it was just screwed on but it just spins. I think it says watts 8P on it.

 

[arctic bill]

some of them have an allen ket set screw check all around and if unscrew the device and replace

 

[Geofd]

If your talking about those vacuum breaker that threads on to a hose connection if you pull away from the spigot while in threading it should come off

 

[psomerville]

I had issues with a different brand. It was held in place with Red Loctite. I had to heat it with a torch to get it off. The ones with a set screw may have a set screw designed to break off. If that is the case, you may have to saw a slit in the backflow prevented across the set screw. Be careful not to saw into the threads. Split the backflow preventer at the slit with a screwdriver. You should then be able to remove it.