On Feb 19, 12:43*pm, "john bently" wrote:
Just replacing the kitchen gas hob for a new one. It comes with a
right-angled pipe (an elbow), one end of which goes into the hob and one end
into the copper supply pipe.

The *threaded* part of one end of the right-angled pipe is about 4mm longer
than the threaded part of the other end.

Would it be the *longer* threaded part that goes into the hob or the
*shorter* threaded part?

Since I was supplied with a rubber washer to go into the hob connection
joint, should I use gas tape on both the threaded ends of the right-angle
pipe. * * Thanks for advice.

You probably ought to check the instructions, they might say. The end
that goes into the stove probably is not tapered thread if it has a
washer that sits under it. In that case you would not use tape. Tape
is only for "pipe" thread. Pipe thread tapers and achieves a seal by
the threads themselves. On that you do use tape or dope. If you
really have soft copper pipe coming in for the supply you may need an
adapter between the elbow and the copper so you can use a compression
fitting on the copper. If that's the case carry the elbow down to a
friendly local hardware shop and ask for help :-) Here in the states
we usually have black iron pipe for supply at it does have tapered
thread but I know you guys and the canadians use copper sometimes.
Nothing wrong with copper but your stove might be geared towards the
way we do it.