On Wed, 02 Jul 2008 15:06:17 -0700, l.lim wrote:

> The Radiator tail shift is 20mm long which accomodates the olive &
> nut. If I fit this into the TRv value out of the box it goes down the
> trv shaft approx 10mm before it seats at the end. However if a
> connected this to new pipe undoing the value later to remove the rad
> with be practically impossibe. the pipe to the value body would nned
> to be bent back at least 10mm to remove the tail shaft. The same
> applies for the lock shield . So for safe removal of the rad later I
> worked out that the shafts from the rad tails need to go down the
> value bodies by no more then 5 mm each to be able to bend the pipe
> back enough to de- couple the values. Is the olive posistion at the
> end of the shaft bad> if so HOW to you couple & un couple the values
> without snaping the pipe.

With compression-type fittings as you've described you do need some play
in the pipework to allow the rad to be removed without loosening *both*
connections to the valve (which obviously means draining down or
stoppering the system. The older-fashioned 3/4" union types still required
some play, but less than the 15mm compression types do.


> Lastly I brought a basic drain cock brass smooth shaft one end can
> this be inserted into an end feed equal tee a soldered . Do a need to
> wire wool the smooth brass shaft a flux?

Yes, and dismantle it so you don't damage the rubber or fibre seal while
soldering.

-- 
John Stumbles

Just because you're paranoid doesn't mean they're not out to get you.