[Heerven]

Hi
since I wanted to replace my O-ring (external) on my filling valve, I was enable to find them in any store in Canada. I don't want to buy the entire fill valve but just the O-ring. All of them are missing on my mags. I check on google and I found this guy who replaced all the O-ring with Teflon tape (or plumber tape). It seems to work great. He even apply it on threads of the fill valve. I wonder if anyone here have already tried this technic?
Does it last Or I have to do the same thing every month. This solution would be super cheap in comparison to buy O-ring all the time. Anyway, I hope someone can give me his opinion on this.
Thanks