In connecting the 10mm speedfit to the TRV,I am pushing the pipe into
the ferule with pipe support and it is a close fit..there seems to be no
way to use a brass olive so the speedfit pipe is not locked into the valve.
The nut to lock the pipe in place has a top hole about 13mm diameter so
couldn't squeeze an olive.

Am I doing something wrong?

PS. By ferule..I mean the collet type thing of which there are 2, 8mm
and 10mm.

You do not need an olive with this TRV-just use the 'ferrule' as you
call it.Having said that I would not take speedfit pipe to the TRV.I
would use 10mm copper instead as the 'ferrule' needs quite a bit of
tightening -you tighten the compression nut at the bottom of the valve
and after half a turn from handtight the 'ferrule' will make a positive
click( it gives way like you have snapped it) then just tighten some
more like you would a normal olive.Plastic pipe to compression fittings
is okay usually and you are doing the right thing in using a pipe
support sleeve but it will be a stronger joint in copper.Let us know
how you get on.

eddy wrote:
You do not need an olive with this TRV-just use the 'ferrule' as you
call it.Having said that I would not take speedfit pipe to the TRV.I
would use 10mm copper instead as the 'ferrule' needs quite a bit of
tightening -you tighten the compression nut at the bottom of the valve
and after half a turn from handtight the 'ferrule' will make a positive
click( it gives way like you have snapped it) then just tighten some
more like you would a normal olive.Plastic pipe to compression fittings
is okay usually and you are doing the right thing in using a pipe
support sleeve but it will be a stronger joint in copper.Let us know
how you get on.


Thanks, Eddy.

Another question, Eddy if you will.

After tightening past the click will can the ferule be removed if I
want to test?

Arthur

I would not recommend the idea of trying to re-use the brass
'ferrule'.Having said that,if you are tightening it onto plastic pipe
you may have a chance of getting it off again but as I say not
recommended.Remember though these are reliable fittings and so long as
you correctly insert an undamaged piece of pipe into the
valve(preferably copper pipe)and tighten sufficiently past the 'click'
you will not have any problems.

replying to eddy, Cookster wrote:
How do they fit in the connectors, which way around did you place the
ferrule... Chamferred into valve or flat end to valve? Cheers

--
for full context, visit https://www.homeownershub.com/uk-diy...c2-318512-.htm