We are thinking of re-arranging our bathroom layout which will mean moving
the toilet onto another wall, this will mean the waste pipe being extended
by about ten feet and also turning a corner. Will there be a problem if we
do this, looking around other houses they seem to have the toilet next to
the stack so the pipe work is as short as possible.

Paul

"Paul" wrote in message
...
We are thinking of re-arranging our bathroom layout which will mean moving
the toilet onto another wall, this will mean the waste pipe being extended
by about ten feet and also turning a corner. Will there be a problem if
we
do this, looking around other houses they seem to have the toilet next to
the stack so the pipe work is as short as possible.

Paul,

You cannot run the stack around the bathroom. It requires a minimum "fall".
You will probably have to dig up outside and extend the stack underground to
the correctly position. and then rise up to the toilet position.

Paul wrote :
We are thinking of re-arranging our bathroom layout which will mean moving
the toilet onto another wall, this will mean the waste pipe being extended
by about ten feet and also turning a corner. Will there be a problem if we
do this, looking around other houses they seem to have the toilet next to
the stack so the pipe work is as short as possible.

The pipe has to have a continuous fall on its way from the toilet.
Which basically means either raising the toilet if you move it further
from the stack, or lowering the location where it enters the stack.

--


--

Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.org

IMM wrote:
You cannot run the stack around the bathroom.
Paul, you can run the branch pipe to the stack around the bathroom.

It requires a minimum "fall".
You require a minimum fall, over 10' with a 90deg this will be around 3"
The 'approved' minimum is 9mm per m, up to a 6m straight run to the stack.

You will probably have to dig up outside and extend the stack
underground to the correctly position.
You won't have to dig up outside or extend the drain to meet the invert of a
new stack as suggested above.

A branch discharge pipe should be fully accessible for clearing blockages,
hence the preference for external pipework over boxed-in internal pipes. A
bend in a branch should have as large a radius as possible.

and then rise up to the toilet position.
A long vertical drop (1.5m) from a wc should be avoided to prevent
self-siphonage of the trap.

--
Toby.

'One day son, all this will be finished'

"Toby" wrote in message
...
IMM wrote:
You cannot run the stack around the bathroom.
Paul, you can run the branch pipe to the stack around the bathroom.

It requires a minimum "fall".
You require a minimum fall, over 10' with a 90deg this will be around 3"

Unlikely he will get it unless he raises the floor where the wc is.

and then rise up to the toilet position.
A long vertical drop (1.5m) from a wc should be avoided to prevent
self-siphonage of the trap.

You put a branch in and short length. This is the norm.

Best do the job properly instead of ugly 110mm pipe, that is liable to get
blocked, snaking all over the place. Cowboy boding methods should be
avoided.

Paul wrote:

We are thinking of re-arranging our bathroom layout which will mean moving
the toilet onto another wall, this will mean the waste pipe being extended
by about ten feet and also turning a corner. Will there be a problem if we
do this, looking around other houses they seem to have the toilet next to
the stack so the pipe work is as short as possible.



Yes, you may well have a problem, since there needs to be quite a fall
on a soil pipe to ensure the turds get sped on their way.

This often mens the pipe needs to go down throughh the floor and join to
the waste downpipe at a lower level.

Or use of a saniflo macerator pump, which cannot cope with anything
solid that anyone may inadvertently drop down the loo.


Paul

The Natural Philosopher wrote

Paul wrote:

We are thinking of re-arranging our bathroom layout which will mean moving
the toilet onto another wall, this will mean the waste pipe being extended
by about ten feet and also turning a corner. Will there be a problem if we
do this, looking around other houses they seem to have the toilet next to
the stack so the pipe work is as short as possible.



Yes, you may well have a problem, since there needs to be quite a fall
on a soil pipe to ensure the turds get sped on their way.

Let's just clear this up. This work will need to comply with the Building Regs
and for a branch pipe of 110mm dia with one WC, the Regs require 18mm fall per
metre run. So if the WC will be 3m away from the stack there will need to be
min 54mm fall from the invert of the pan outlet to the invert of the branch
connection on the stack pipe. If this can't be achieved it will be necessary to
either raise the pan or lower the branch connection to the stack. Remember
modern WC pans have horizontal outlets, which might help.

Peter

"Paul" wrote in message
...
We are thinking of re-arranging our bathroom layout which will mean moving
the toilet onto another wall, this will mean the waste pipe being extended
by about ten feet and also turning a corner.

Thanks for the replies so far, The stack at the moment is cast iron so we
intend to change it for plastic. so moving the inlet from the toilet lower
will be no problem.
So to clarify as long as there is a drop of 18mm fall per metre run of pipe
there should be no problem, even with one 90 deg bend? the plan is to have
all the pipework outside rather than boxed in internally.

Paul.

The Natural Philosopher wrote:


Yes, you may well have a problem, since there needs to be quite a fall
on a soil pipe to ensure the turds get sped on their way.


As others have noted the fall can be as low as 18mm / metre run, which is
only just noticeable with the eye, the idea behind relatively the low
gradients is that if the pipe is too steep the water can flow quicker than
the turds, hence leaving them high and dry in the pipe.

Jon

On Sun, 4 Apr 2004 15:33:35 +0100, "Jonathan Pearson"
wrote:

The Natural Philosopher wrote:


Yes, you may well have a problem, since there needs to be quite a fall
on a soil pipe to ensure the turds get sped on their way.


As others have noted the fall can be as low as 18mm / metre run, which is
only just noticeable with the eye, the idea behind relatively the low
gradients is that if the pipe is too steep the water can flow quicker than
the turds, hence leaving them high and dry in the pipe.

Jon



I wonder if someone at the Building Research Establishment tested this
before publishing the information on it. Perhaps there's a British
Standard turd?



..andy

To email, substitute .nospam with .gl

On Sun, 4 Apr 2004 15:33:35 +0100, "Jonathan Pearson"
As others have noted the fall can be as low as 18mm / metre run,
which is only just noticeable with the eye, the idea behind
relatively the low gradients is that if the pipe is too steep the
water can flow quicker than the turds, hence leaving them high and
dry in the pipe.

Absolutely, and as updated by the 2002 edition of the regs. Not as my
earlier outdated suggestion. (damm regs bible is getting old)

Sounds like the external branch and new plastic stack will go in without
hassle. My neighbours replacement black stack clicks like crazy everytime
the sun passes behind clouds, so I might suggest grey pipe instead.

Andy Hall wrote:
Perhaps there's a British Standard turd?

There is, although it's been europeanised now. Annex F of BS EN 997. They
also seem to believe sawdust is regularly expelled from pans.

--
Toby.

'One day son, all this will be finished'

Andy Hall wrote:

I wonder if someone at the Building Research Establishment tested this
before publishing the information on it. Perhaps there's a British
Standard turd?

with perhaps upwards of 40 million toilet systems in the UK, you can be rest
assured that many tests will have been carried out over the years!

and yes their is a british standard turd, in the form of plasrerscene!,
condoms and sanitary towels etc are also tested.
Jon

Andy Hall formulated on Sunday :
I wonder if someone at the Building Research Establishment tested this
before publishing the information on it. Perhaps there's a British
Standard turd?

There is a British Standard turd substitute (seriously).

--


--

Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.org

"Andy Hall" wrote in message
...
snip
Perhaps there's a British Standard turd?

Yes - and his/her name is [insert politician/other public or private
figure/NG poster etc. of choice here]
:-)

"Paul" wrote in message
news:y6Sbc.44$V13.7@newsfe1-win...

"Paul" wrote in message
...
We are thinking of re-arranging our bathroom layout which will mean
moving
the toilet onto another wall, this will mean the waste pipe being
extended
by about ten feet and also turning a corner.

Thanks for the replies so far, The stack at the moment is cast iron so we
intend to change it for plastic. so moving the inlet from the toilet lower
will be no problem.

So to clarify as long as there is a drop of 18mm fall per metre run of
pipe
there should be no problem, even with one 90 deg bend? the plan is to have
all the pipework outside rather than boxed in internally.

The bend will need an inspection cover in it to rod out if blocked. It is
going to look crap on the outside with all this 110mm pipes snaking around
the walls. It would ensure you vent over the eves to avoid any problems.