On Wed, 8 Feb 2006 00:14:19 -0000, a particular chimpanzee named
"JoeJoe" randomly hit the keyboard and produced:

The waste run in my new kitchen is very long, and hence the BCO insisted on
installing an AAV on the 40mm pipe. The plan is to fit it under the worktop
next to the kitchen sink.

My logic suggests that the AAV needs to be fitted above the highest possible
water level in the sink. IS this really the case? i.e. do I need to re-think
my plan?

Are you sure he's not talking about an anti-vac trap [1] which is
fitted instead of the standard trap?

[1] I'm sure Dr Dibble will be along in a short while to extol the
virtues of HepVO traps.
--
Hugo Nebula
"If no-one on the internet wants a piece of this,
just how far from the pack have you strayed?"