The proposed new location of a new kitchen sink is giving me some
brainstrain. I really need to fit it against an internal, party wall
which means that the drains are a bit awkward. The pipe would have to
go right round the kitchen, to the right, attached to three walls, and
then I'd still need to move the gully to the other side of the back door.

Pipe can't go straight out the back (party wall); can't go to the left
(internal doorway in the way)

Now the other thing is that there is a step down into the room (about
4") at the internal doorway (see below), and in any case I will be
raising the floor to make it level. Existing floor needs a DPC anyway,
so this makes sense.

So - what I'm thinking, why not send the 1.5" drainpipe straight across
the room buried in the new floor, ie straight to the gully as the crow
flies? I can't find any info about doing this: is it
do-able/reasonable? Would it simply be a case of laying the DPC
underneath where the pipe would run, fixing pipe in position with
adequate fall (how much?) and then just pouring concrete over the top?
Pipe would need to enter the floor under the sink perpendicularly -
what minimum level of concrete cover would be needed?

Thanks
David




_____________________
| S |
| |
ID |
|
| |
|_ BD __________|

X


ID= internal doorway
S= proposed new sink
BD= proposed back door
X= position of gully outside

Lobster wrote:

So - what I'm thinking, why not send the 1.5" drainpipe straight
across
the room buried in the new floor, ie straight to the gully as the
crow
flies? I can't find any info about doing this: is it
do-able/reasonable?

why not?


Would it simply be a case of laying the DPC
underneath where the pipe would run, fixing pipe in position with
adequate fall (how much?) and then just pouring concrete over the
top?

I'd wrap something soft round the pipe so it can move a little, plastic
shrinks and expands with temperature.


Pipe would need to enter the floor under the sink perpendicularly
-
what minimum level of concrete cover would be needed?

whatever youve got space for. Its not like youre putting heavy duty
point loads under the sink.


A rodding eye might make life easier later.
I'd also solvent weld any joints


NT

wrote in message oups.com...
Lobster wrote:

So - what I'm thinking, why not send the 1.5" drainpipe straight
across
the room buried in the new floor, ie straight to the gully as the
crow
flies? I can't find any info about doing this: is it
do-able/reasonable?

why not?

Erm - well, just that I can't remember having seen it done, and
wondered if there was a reason not to; and if so I'd rather know now
at the early planning stage than after I'd set the pipe in concrete
:-)

Thanks for the tips - sounds sensible.

David