There was a hard plastic washer on the flange
There was a hard plastic washer on the flange so I tried wrapping ptfe tape around the threads to make a new washer. I also tried wrapping ptfe around the treads.
This is the plastic washer.
I have a old single radiator that's leaking from the bleed valve fitting so I removed it and noticed the plastic sealing washer is worn so I tried using ptfe tape but it was still leaking so can anyone tell me what washer to use. I need...