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ok will do, if the old one was on v tight though, will the new one be ok and not leak? will do it now!!

The nut won't seem to cut - seems very thick. shall i try PTFE down the gap ebtween the olive and nut and tighten then?

thing is i can't fit a hacksaw down the gap, the nut is right tight up to the olive .... will PTFE wound round and pushed down towards the olive - and then pushed up into the new valve be ok?? if the old olive was overtightened and i get it off - will the pipe be ok or need replacing ??

I hope someone can offer me some experienced advice here: I have just / am in the middle of replacing a faulty TRV on my bedroom radiator - i drained down the radiator and bunged the header tanks feed and vent pipes, all is ok, but i cannot get the old olive off the pipe uo to the rad, as the...