In article ,
"Richard Owen" writes:
Hello all, me again.

Here is the part in question......(kindly web-published by Colin Wilson).

www.phoenixbbs.co.uk/elbow_1.jpg
www.phoenixbbs.co.uk/elbow_2.jpg

It's brass, about the size of a man's thumb. The nipple at the back is
important in order for service engineers to attach a rubber tube, for
pressure testing I expect.

Well, here's one without the nipple:

http://marinestore.co.uk/Merchant2/m...=tonval-elbows

https://secure.thorite.co.uk/Product...taper_177.html

Ironically, on the left hand side, you'll see a reference to
"Nipples" and "Nipples unequal", but they aren't what you think
they might be, unfortunately... ;-)

There are a number of things on the following page which might be
useful. There's a bare nipple 6901 which you might be able to drill
and tap into an elbow, and straight brass adaptor 15204 which could
possibly be coupled to an elbow with a shortening of the pipework.

http://www.bes.co.uk/products/048.asp

--
Andrew Gabriel