i am trying to fit a 8mm microbore to a radiator valve i have the
reducer (Brass ) and it slides on and off the end of the micro bore
pipe even when tighten. how do i fix this so it doesn't slide off

In article . com,
wrote:
i am trying to fit a 8mm microbore to a radiator valve i have the
reducer (Brass ) and it slides on and off the end of the micro bore
pipe even when tighten. how do i fix this so it doesn't slide off

Unless you've missed out the olive, it's not 8mm.

--
*Life is hard; then you nap

Dave Plowman London SW
To e-mail, change noise into sound.

Dave Plowman (News) wrote:
In article . com,
wrote:
i am trying to fit a 8mm microbore to a radiator valve i have the
reducer (Brass ) and it slides on and off the end of the micro bore
pipe even when tighten. how do i fix this so it doesn't slide off

Unless you've missed out the olive, it's not 8mm.

(but you don't need an olive if you have a reducer??)

I'm guessing you have a reducer for 10mm microbore. It should be a very
snug fit before tightening up the compression fitting. If it's
definitely an 8mm reducer, then you aren't tightening it up enough)

David

In article ,
Lobster wrote:
Dave Plowman (News) wrote:
In article . com,
wrote:
i am trying to fit a 8mm microbore to a radiator valve i have the
reducer (Brass ) and it slides on and off the end of the micro bore
pipe even when tighten. how do i fix this so it doesn't slide off

Unless you've missed out the olive, it's not 8mm.

(but you don't need an olive if you have a reducer??)

If it clamps onto pipe how would it work without?

I'm guessing you have a reducer for 10mm microbore. It should be a very
snug fit before tightening up the compression fitting. If it's
definitely an 8mm reducer, then you aren't tightening it up enough)

--
*Do they ever shut up on your planet?

Dave Plowman London SW
To e-mail, change noise into sound.

Dave Plowman (News) wrote:
In article ,
Lobster wrote:
Dave Plowman (News) wrote:
In article . com,
wrote:
i am trying to fit a 8mm microbore to a radiator valve i have the
reducer (Brass ) and it slides on and off the end of the micro bore
pipe even when tighten. how do i fix this so it doesn't slide off
Unless you've missed out the olive, it's not 8mm.

(but you don't need an olive if you have a reducer??)

If it clamps onto pipe how would it work without?

Cos it's a kind of 'self-olive'... assuming this is the kind of thing:
http://www.screwfix.com/app/sfd/cat/pro.jsp?cId=100122&ts=46954&id=23297
When you tighten them up you hear a slight crack as they snap into two
inside the fitting (at the point where there's a deep groove, near the
close end of the pic), and the two bits (I think) then mate together as
you continue tightening the nut. Certainly the small bit gets
compressed down like an olive.

I fitted several of these last week, but haven't dismantled any to
investigate exactly how they work - and that's a good thing as it means
they all sealed fine!

David

On 1 Apr 2007 08:32:26 -0700, "
mused:

i am trying to fit a 8mm microbore to a radiator valve i have the
reducer (Brass ) and it slides on and off the end of the micro bore
pipe even when tighten. how do i fix this so it doesn't slide off

If the reducer is the one that came with the valve then it's most
likely a 10mm reducer. You need to either source a 10x8 reducer and
alter the pipework before it gets to the valve or find a reducer for
the valve that takes it down to 8mm.

If you have already tightened the assembly to a suitable tightness
then the reducer may well be unusable now anyway as it deforms
internally to tighten onto the pipe.

The other reason it might not have worked is that you are a girl and
your weak limbs aren't capable of tightening the thing up properly.
--
Regards,
Stuart.

In article ,
Lobster wrote:
Unless you've missed out the olive, it's not 8mm.

(but you don't need an olive if you have a reducer??)

If it clamps onto pipe how would it work without?

Cos it's a kind of 'self-olive'... assuming this is the kind of thing:
http://www.screwfix.com/app/sfd/cat/pro.jsp?cId=100122&ts=46954&id=23297
When you tighten them up you hear a slight crack as they snap into two
inside the fitting (at the point where there's a deep groove, near the
close end of the pic), and the two bits (I think) then mate together as
you continue tightening the nut. Certainly the small bit gets
compressed down like an olive.

Ah - not used or seen that type. The ones I've used have just been like a
conventional compression fitting. Although I'd more usually prefer solder
fittings.

I fitted several of these last week, but haven't dismantled any to
investigate exactly how they work - and that's a good thing as it means
they all sealed fine!

--
*If a pig loses its voice, is it disgruntled?

Dave Plowman London SW
To e-mail, change noise into sound.

In article , Dave Plowman (News)
writes
In article ,
Lobster wrote:
Unless you've missed out the olive, it's not 8mm.

(but you don't need an olive if you have a reducer??)

If it clamps onto pipe how would it work without?

Cos it's a kind of 'self-olive'... assuming this is the kind of thing:
http://www.screwfix.com/app/sfd/cat/pro.jsp?cId=100122&ts=46954&id=23297
When you tighten them up you hear a slight crack as they snap into two
inside the fitting (at the point where there's a deep groove, near the
close end of the pic), and the two bits (I think) then mate together as
you continue tightening the nut. Certainly the small bit gets
compressed down like an olive.

Ah - not used or seen that type. The ones I've used have just been like a
conventional compression fitting. Although I'd more usually prefer solder
fittings.

I fitted several of these last week, but haven't dismantled any to
investigate exactly how they work - and that's a good thing as it means
they all sealed fine!

The reducing sets I have used for compression fittings certainly use an
olive but I'm sure others have mentioned a sort of pre-assembled (and less
fiddly) one-piece.
--
fred
Plusnet - I hope you like vanilla