"Bob Minchin" wrote in message
...

FrancisJK wrote in message ...

"Harry Bloomfield" wrote in message
o.uk...
FrancisJK laid this down on his screen :
What should I use to seal a BSP TAPER brass fitting to a cast iron
boiler
tapping. I have PTFE tape, I don't have hemp.

Boss White?

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Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.org


Yes, I have Boss White, although it is Green.


FrancisJK



When I have not got some hemp to hand, I use a piece of coarse 'hairy'
string that I know as sisal. Cut a few inches off and tease out to a
bundle
of single strands. Add the boss-white and use as normal.

regards

Bob




Yes, I know sisal. Were you a Boy Scout?

Most just call it string.

I found some threads in the newsgroup on the subject.

Interesting stuff on imperial/metric sizes. It seems that in the UK imperial
size relates to the bore or inside diameter of the tube.

Here in Ireland pipe and fittings are imperial, although it refers to the
outside diameter of pipe.

Thus 1/2", 3/4" and 1" available, but newer copper and brass is stamped 14.7
mm, 21 mm and 27.4 mm.



FrancisJK