ᐅ Possible bathroom layout – distance between toilet and soil stack
Created on: 25 Dec 2021 22:58
J
johannes.spr
Hello everyone,
we would appreciate an assessment, as despite intensive phone inquiries, we were unable to get an appointment with a plumber before Christmas.
We are currently planning our bathroom for our new build: The question is whether this layout (see attached image) is technically feasible in terms of the distance between the toilet and washbasin to the soil pipe.
It is important to know that below the toilet/washbasin is the open kitchen/dining area, so there is no wall. Therefore, the soil pipe cannot be located directly behind the toilet/washbasin.
The blue lines drawn represent approximately the walls beneath the bathroom. Is it possible to route the toilet waste pipe through the floor (below or within the screed?) to one of the "blue" walls? Or is this not advisable?
Thank you for your assessment! It would greatly help us at this stage.
Kind regards
johannes.spr
we would appreciate an assessment, as despite intensive phone inquiries, we were unable to get an appointment with a plumber before Christmas.
We are currently planning our bathroom for our new build: The question is whether this layout (see attached image) is technically feasible in terms of the distance between the toilet and washbasin to the soil pipe.
It is important to know that below the toilet/washbasin is the open kitchen/dining area, so there is no wall. Therefore, the soil pipe cannot be located directly behind the toilet/washbasin.
The blue lines drawn represent approximately the walls beneath the bathroom. Is it possible to route the toilet waste pipe through the floor (below or within the screed?) to one of the "blue" walls? Or is this not advisable?
Thank you for your assessment! It would greatly help us at this stage.
Kind regards
johannes.spr
J
johannes.spr26 Dec 2021 10:53Tolentino schrieb:
Well, it’s not ideal, but yes, it’s definitely possible. It was done that way in my case as well.
That’s why I said it depends on the floor structure.
But a DN10 pipe fits perfectly into 10cm (5 inches) of insulation tack mat plus screed.
There probably won’t be a window on the ground floor…The floor structure is 16 cm (6.3 inches), with approximately 8 cm (3 inches) of insulation. Does that mean the insulation throughout the entire upper floor would have to be 10 cm (4 inches)? Did you do it that way? Thanks
In fact, the insulation without a stapling mesh (which is insulation itself) was also 8cm (3 inches) in my case.
For me, the drain pipes from the shower and toilet were routed about 1.8m (6 feet) across the main soil stack. I even installed the first 8cm (3 inches) myself. The wastewater pipe was even slightly exposed there. The plumber then installed a 3cm (1 inch) stapling mesh over it, and the screed nicely concealed everything.
At my neighbor’s place, a pipe running about 2m (6.5 feet) crosswise had to be cut out from the screed and boxed in by a drywall installer. Of course, this is not ideal for a new build, but it is technically possible.
For me, the drain pipes from the shower and toilet were routed about 1.8m (6 feet) across the main soil stack. I even installed the first 8cm (3 inches) myself. The wastewater pipe was even slightly exposed there. The plumber then installed a 3cm (1 inch) stapling mesh over it, and the screed nicely concealed everything.
At my neighbor’s place, a pipe running about 2m (6.5 feet) crosswise had to be cut out from the screed and boxed in by a drywall installer. Of course, this is not ideal for a new build, but it is technically possible.
You can also prepare a corresponding conduit directly in the concrete floor. Simply press the PVC sewer pipe (KG pipe) slightly into the liquid concrete and shape the concrete around it. Then remove it again and let the concrete cure. This way, you easily save 3-5cm (1-2 inches), allowing you to "hide" the 100mm (4 inches) pipe later within the insulation with sufficient slope. It should be unproblematic!
The vent pipe, of course, then needs to be routed further into the attic space within the cavity wall construction.
The vent pipe, of course, then needs to be routed further into the attic space within the cavity wall construction.
J
johannes.spr26 Dec 2021 11:18ypg schrieb:
As far as I know, a drain is not laid crosswise and does not fit within the screed. I see the blue intersection mark near the window, but the pipe would also need to be vented…
I would wait until the experts return from their vacation!
Without the ground floor plans and so on, this is mostly guessing. The walls on the ground floor are roughly shown by the blue lines. There is no window at the blue line on the ground floor, but a sliding door which might cause interference. Thanks for the info.
Tolentino schrieb:
Well, it’s not great, but yes, it’s definitely possible. It was done in my case as well.“So it was done in your case as well” probably means: done properly without shortcuts? I’m glad they paid attention to keeping the pipe runs short because blockages with this kind of layout are no joke.
I wouldn’t recommend such a crosswise installation.
Yes. The same attention is paid to the slope as under the concrete slab or over several meters in the garden. You need a minimum diameter of DN 80 and must maintain the slope; then you will only have problems if you flush something down the drain that is not intended for it...
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