Fernox TF-1: leaking at drain valve

[Sponge]

My TF1 is leaking and upon inspection it appeared to be coming from where the metal drain valve screws onto the plastic body. There's somewhere to place a spanner, so I decided to tighten it a little, but it still leaked. So I decided to remove it, clean and check for possibe causes.

After I did this, I went online and found the instructions and discovered this rather worrying sentence, 'Drain valve. Factory fitted do not remove' Doh!

Anyway, it's done. So I'm thinking a bit of PTFE tape and screw it back on, hoping for the best? Or do you think it's now goosed and will need replacing?

 

[Rob]

Plastic and metal threaded together is not a good mix!

Yeah a bit of PTFE might do it but not too much as it might split the plastic

 

[ScottishGasMan]

In my expirience these filters leak more than any other I've seen. even from new. How old is it? get on Twitter, Fernox have a twitter page and ask them if its still under warranty etc