Can you (still) get a vertical outlet back-to-wall S trap toilet.
I will be putting a new small toilet room into the corner of the
kitchen, with the cistern the other side of the wall under the stairs.
The loo needs to be back to the wall, with the outlet discharging
downwards into a new soil pipe what will be layed in the floor.
Can't find such on the web. Maybe I don't have the right keywords.
You need a standard back-to-the-wall toilet and concealed cistern.
These have a horizontal outlet which is far enough forward to use a 90
degree pan connector (or a swan neck if space is tight).
I usually fit the Roca Laura version, or the Roca Senso Compact if
space is really tight.
You should be able to use a rear outlet one quite easily.
I've recently remodeled a cloakroom which has a soil pipe in the floor.
I went for a wall mounted pan and used a Grohe frame to mount it.
The package comes with a right angled soil pipe adaptor. There is an
option for a canted version of the adaptor which effectively allows the
soil pipe to be immediately behind the panel rather than about 30mm
back. Geberit is another manufacturer of these.
For a back to wall pan, you don't need the frame, but the principle is
There are plenty of suppliers on the web. Boundary Bathrooms has a
fairly well laid out site with quite a wide choice.
Tried the Grohe web site, no pictures or mention of these frames.
Got a bit closer with Geberit, who have a tiny thumbnail of some frames but
clicking the download 'technical information' link on the Wall Hung Systems
page, not unexpectedly returns a 404 error.
They hide their products well - obviously don't want *everyone* buying
I used the Grohe one because the web site had much better detail of how
maintenance is done. Probably the Geberit one is similar.
At any rate, you can get the Grohe cistern separately if you are happy
with a back to wall pan on the floor. The frame is to support wall
mount pans. My suggestion to look at this was based on having to deal
with soil connection in the floor with the wall directly in front of
the frame. If you have control over where the soil pipe is positioned
in the floor, then you have no problem.
For the Grohe cistern, all maintenance can be done through a small
panel in the top or front. This is normally where a flush panel is
fitted. To maintain, remove flush panel. You can access the
cistern and remove the siphon and float valve for maintenance - all
spares available of course.
I went for a different arrangement because I didn't want to have a
flush panel - would have spoiled the appearance of the installation -
so instead used a dual push button with pneumatic tubes to the flush
The cistern itself is in an enclosure with a removable granite top.
If you have access to the cistern easily, then maintenance may not be a
problem, but it is something else to take into consideration.
My situation is to replace a former close coupled Twyford S type pan.
The difficulty is getting a new soil pipe outlet (with adpator) to line up
with the soil pipe emerging from the flooring.
I would like to go for a wall mounted pan, but am concerned that there will
not be sufficient clearence behind the pan to get the outlet to line up with
the soil pipe.
The close coupled (cheapo) P type pans fitted with S adaptor that I have
seen so far, require the soil pipe to be much closer to the wall than can
be easily accomodated because the soil pipe comes along between rafters
parallel to the wall. This would mean setting the cistern forward from the
wall on some kind of boxed in frame. Not IMO the most desirable solution.
Possibly the wall mounted pans you mentioned may offer a solution.
Another option if you are going to create a box is to buy just an
enclosed cistern. The two vendors above make these as well and there
are other sources. You could fit the cistern onto the wall or on the
back of the panel and go for your original idea of a back to wall pan.
Rather than lose the res of the space, you could perhaps think about
making a small cupboard alongside the cistern.
This is why one uses a proper steel frame behind a wall panel and the
pan is attached to that. The frame is attached to the structure of
the wall panel (e.g. studs or steel framing) or to masonry behind.
Considering the mechanics, most of the weight is transfered to the floor
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