Self Sealing Rad Tails

[JS1]

Just bought some lockshield valves that have self sealing tails. Is is necessary to use loctite 55 or similar on the threads or can the installed seal be trusted?

Thanks

 

[Stigster]

I would always add some type of seal to the threads and not just leave it to the seal at the shoulder.

 

[centralheatking]

Just bought some lockshield valves that have self sealing tails. Is is necessary to use loctite 55 or similar on the threads or can the installed seal be trusted?

Thanks

Yes use a seal as well because not all threads are as tight as they ought to be, tolerances vary especially with worn machinery and dodgey imports

 

[king of pipes]

Belt and braces mate add a few turns of jointing material . Kop