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Discuss Shortest concealed cistern available? in the Plumbing Forum | Plumbing Advice area at PlumbersForums.net

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I am having a wall hung toilet installed in an upstairs bathroom. The toilet will be built into a wall which will be 780mm tall. There will be a 10mm thick piece of wood stuck on top to give a total height of 790mm. This built out wall will protrude 220mm from a brick party wall.

I have found the below wall hung frame which has the following dimensions, 385w x 140d x 325-525h. I would place this cistern on the frame.



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If I take the shortest height adjustment of 325mm for the frame and add it to the total height of the concealed cistern including the flush pipe @ 430mm I would get a total combined height of 755mm?

Are those calculations correct?

I also want to know where I can find a suitable low cistern compatible wall hung toilet to allow for the small height not giving enough force for the water to flush the toilet properly.

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ShaunCorbs

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king of pipes

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I like it all in one like this it came from plumbcity
 

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king of pipes

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Esteem bathrooms bud 795mm is minimum height no access needed from the top all maintenance and water isolation is through the flush plate. Kop
 

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Ok so 795 minimum height. So if you add a 20mm shelf on top that gives 815mm height?

I require the shelf for aesthetic reasons. The highest I would be willing to go to is 800mm so it's still 15mm too tall.

What if I cut 25 mm out of around 8 of the floor beams and placed a 5mm thick steel bar across to attach the legs of the frame to? This would allow me to lower the frame 20mm.
 
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I think I may have solved it. Please can this be confirmed to be correct.

If I buy this frame along with this cistern I will get a floor to top height of 770mm. The frame height is 360 to the centre of the flush pipe. If I include the cistern with a height of 290 plus the 120mm flush pipe height to give me 770. Are my figures correct, or should I be allowing for a higher flush pipe?



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king of pipes

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Your choice mate I like to keep it higher so the toilet pan can be fitted at comfort height which is 480 mm to the top with the seat on 500mm, just be aware of that also. Kop
 

Chalked

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800 furniture frames are the lowest you can get. Even with a separate cistern you will still find that you can’t go lower.
if you do, you will only be lowering the toilet pan, which won’t work.
the only other solution if you can’t increase height is to locate the cistern elsewhere and pipe the flush pipe to the wc.
 
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800 furniture frames are the lowest you can get. Even with a separate cistern you will still find that you can’t go lower.
if you do, you will only be lowering the toilet pan, which won’t work.
the only other solution if you can’t increase height is to locate the cistern elsewhere and pipe the flush pipe to the wc.

I actually found Geberit Duofix 79cm Furniture Frame for a Wall Hung WC which is 790 tall. Geberit told me themselves it can be lowered 50mm to 740mm. I do not quite believe them so I have ordered one from ebay to see how low it can really go. If I get stuck I can place it directly on the wooden floor 10mm below the bathroom floor tiles to make it only 780 tall. I could probably shave another 10mm off by cutting into the floor and having it 20mm below the bathroom floor tiles. I also have the option of cutting a cistern sized recess 10mm into the 20mm shelf.

The issue is the tiles, cistern height and bath height are all linked. I currently have the bath at 565 from the floor which I feel is very high. The max the bath height can go is 590 but want to avoid having it that high as it makes getting in and out of the bath difficult.
 
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Chalked

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All you are doing is lower the toilet.
it will look and feel very odd when its 30mm lower than standard height.
 

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