Originally Posted by AusCan
If it's a tapered thread of any type, it will need a thread sealant.
I use 2-3 layers of PTFE tape for all my NPT connections. That does not work for this fitting. I did notice on the UK youtube videos for how to use PTFE tape, they use 10 layers of tape. In the US videos I have seen they only use 2-3. So maybe more tape would have fixed the problem.
Either way, I switched from PTFE tape to thread sealant (dope) and that solved the problem, at least for now. More layers of PTFE might have solved it too.