I know I'm answering my own post here, but for anyone else who's
interested, I posed some remaining queries with Saniflow technical
advice. Here are the answers, with the questions below:

Thank you for your enquiry,

In answer for your questions: -

1. Either is fine
2. Yes
3. Yes, Hunter Plastics manufacture one, and there are others, please
contact your local plumbers merchants.
4. As long as you stick to the guidelines, the pipework should be fine
for a
number of years (i.e. 10-30) but it may be subject to
sediment/limescale
buildup eventually
5. You can insert a T-Piece and this will aid rodding should the need
ever
arise, unfortunately we are not aware of a particular 22mm rodding
system,
but there is an air pressure system.
6. You would require a 22 or 32mm strap-on boss (in conjunction with a
22/33mm reducer) which you can get from your local plumbers merchants.

If you have any further questions, please do not hesistate to contact
us,

Thank you,

SANIFLO TECHNICAL

-----Original Message-----
Sent: 27 August 2003 13:47
To:
Subject: Waste pipe


Could you clarify 1 or 2 things for me please:

I am planning to install a Sanitop (basement).

I can get the required fall etc. Have a 2.5m vertical lift followed
by
approx 10m run at the 1:200 fall specified to the soil pipe. The
'horizontal' run only requires 2 swept 135 deg bends to go through the
wall
and into the soil stack - which is good.

1. it isn't clear is whether the 22mm waste pipe is copper or CPVC.
2. is CPVC solvent weld?
3. I am only aware of 32mm and 40mm sizes for solvent weld - does 22mm
exist?
4. 22mm seems very narrow - is there any risk of blockage?
5. servicability: would it be a good idea to insert the occasional tee
and
end stop to gain access for rodding? Is there anything small enough
to rod
a 22mm pipe with? Would such a fitting create unneccessary
turbulence/drag
therefore increase the chance of blockages occuring in the first
place?
6. finally how would you make the connection with the soil stack? I
have an
old cast iron soil stack

Thanks very much in advance. I understand it is very important to
install
these units correctly and want to get it right 1st time.