On Tue, 22 Nov 2005 00:13:04 -0000 someone who may be "Rob Convery"
wrote this:-

I am putting a new basin into my toilet room. The toilet current connects
into one of these http://www.screwfix.com/sfd/i/cat/00/p1063600_x.jpg on the
main soil stack (well almost that but with what looks like screw fittings).
I want to connect my 32mm waste from the basin into it.

I wouldn't want to do that. Connections should not be made to the
stack within 200mm of the centre point of a lavatory connection.
This is to avoid the possibility of the lavatory discharge blocking
or obstructing smaller waste pipes.

Instead make the connection at least 200mm above or below the
lavatory connection, using a suitable boss. Whether it is above or
below depends on your plumbing. The hole can be made with a suitable
hole cutter (into a plastic stack).

There are patent fittings to avoid this, but I suspect it would mean
dismantling the stack to insert one, which you may not want to do.


--
David Hansen, Edinburgh
I will *always* explain revoked encryption keys, unless RIP prevents me
http://www.opsi.gov.uk/acts/acts2000/00023--e.htm#54