On Thu, 13 Nov 2003 22:05:20 GMT, a particular chimpanzee named
randomly hit the keyboard and produced:

I have just moved into a house, built about 1965-1970. The strange thing is
that the soil pipe goes into the loft but is then sealed with an end cap, I
always presumed that the soil pipe should go out the roof. It does not loof
as if the pipe has ever gone outside. The top of the soil pipe looks
correct, it looks like it was made be BAA.

I suspect that the logo on the top is BBA (British Board of Agrement)
which is the body that certifies building products. If it is there
should be a number underneath (yy/nnnn) which if you plug in to the
certificate search of http://www.bbacerts.co.uk/frames.html, should
come up with a certificate for an air-admittance valve.
--
Hugo Nebula
"You know, I'd rather see this on TV,
Tones it down" - Laurie Anderson