Shortest concealed cistern available?

[Solar_wind]

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]

Fluidmaster Concealed Cistern 6Ltr

Order online at Screwfix.com. Easy to install 6Ltr cistern complete with Part 4 inlet valve and push-button cable dual-flush valve. Twist and release action for easy maintenance. Fully height adjustable internal overflow and extra-long 640mm cable for easy installation. Supplied with fittings...

www.screwfix.com

 

[king of pipes]

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

 

[Solar_wind]

I like it all in one like this .

Hi what exact frame is that?

Also what is the min height you can have it including the cistern? Could you have it 790mm high and stick a 20mm thick shelf on top for ease of access.

 

[king of pipes]

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

 

[Solar_wind]

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.

 

[Solar_wind]

Duofix Frame For Wall-Hung WC, 79 cm With Low-Height Furniture Cistern

For installation in bathroom furniture For wall-hung WCs with connection dimensions in accordance with EN 33:2011 For wall-hung WCs with projection up to 62 cm For floor constructions 0–20...

www.waltonbathrooms.co.uk

What about this one is is 5mm shorter at 790mm.

 

[Solar_wind]

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?

 

[king of pipes]

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]

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.

 

[Solar_wind]

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.

 

[Chalked]

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

 

[Solar_wind]

How about I put the cistern behind the shower to the right of the toilet? Though the flush pipe would have to bend at 90 degrees to reach the toilet. Would this work?

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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.

 

[king of pipes]

Personally I wouldn't do that the cistern at sometime in its life will need attention so the tiles may need to be removed the seals can and do fail I've seen a few horrors , I think your getting to hung up on tile heights a bath is determined by the bath panel height even if you tile it which is not a great idea in my opinion you will not get full tiles everywhere. keep it simple as possible and fix the frame well any flexing of timbers cause you problems later on always keep a box of tiles if needed in the future. Kop

 

[Solar_wind]

Ok so if I have the bath at 59cm the toilet can be 5mm close to the correct height. The standard bath height is 51cm. Do you think 59cm is low enough if I am 5ft 6 tall. I guess I could get into the bath side ways rather than head on to make it easier to get into. I could also have a step to hand.

At the end of the day the shower will be used everyday the bath maybe once every 2 weeks.

The bath will not have taps but will be filled via the overflow. How long before things leak and I then have to rip up the tiles on the bath. I will keep some spare. The same goes for the shower too as it is fully integrated.

 

[king of pipes]

Ok so if I have the bath at 59cm the toilet can be 5mm close to the correct height. The standard bath height is 51cm. Do you think 59cm is low enough if I am 5ft 6 tall. I guess I could get into the bath side ways rather than head on to make it easier to get into. I could also have a step to hand.

At the end of the day the shower will be used everyday the bath maybe once every 2 weeks.

The bath will not have taps but will be filled via the overflow. How long before things leak and I then have to rip up the tiles on the bath. I will keep some spare. The same goes for the shower too as it is fully integrated.

If done correctly i would expect 10 years service out of a good install before things start looking tired or failing i just did this one it was 600mm to top off the bath before the flooring went down flooring which was 20mm so 580mm so your not far off also had a bath filler and overflow combined . Regards kop

 

[Solar_wind]

If done correctly i would expect 10 years service out of a good install before things start looking tired or failing i just did this one it was 600mm to top off the bath before the flooring went down flooring which was 20mm so 580mm so your not far off also had a bath filler and overflow combined . Regards kop

Ok thanks that is very reassuring. Is it ok if I attach my upstairs bathroom plans to see if there are any other issues you can spot? I have yet to modify the bath height in these drawings so please ignore that. I think I should be able to have the bath panel removable even with it tiled.

On the third image I have two placements for the shower valve not sure which one is better.

The shower niche I want a white one but the issue is I can't find one which is the exact size to match my metro tiles.

I found this one, it is 304mm x 304mm. The 304mm height would allow for 2mm grout top and bottom meaning the tiles do not need to be cut that way. If I could find a similar niche but in white to match the colour of the tiles that would be magic.

Many thanks

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[king of pipes]

Ok thanks that is very reassuring. Is it ok if I attach my upstairs bathroom plans to see if there are any other issues you can spot? I have yet to modify the bath height in these drawings so please ignore that. I think I should be able to have the bath panel removable even with it tiled.

On the third image I have two placements for the shower valve not sure which one is better.

The shower niche I want a white one but the issue is I can't find one which is the exact size to match my metro tiles.

I found this one, it is 304mm x 304mm. The 304mm height would allow for 2mm grout top and bottom meaning the tiles do not need to be cut that way. If I could find a similar niche but in white to match the colour of the tiles that would be magic.

Many thanks

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It's a good idea to keep the shower mixer way from the shower head I would go as circled below , you only need two upstands on the tray in my opinion you can easily make a niche using 6 mm Wedi board . Regards kop

 

[Solar_wind]

It's a good idea to keep the shower mixer way from the shower head I would go as circled below , you only need two upstands on the tray in my opinion you can easily make a niche using 6 mm Wedi board . Regards kop

Thanks for those recommendations.

This 6mm wedi board would be used throughout the bathroom I assume. So for the back and four sides of the niche I wouldn't be using metro tiles. Is there something I can get which matches the colour of the metro tiles. Would it be a white tile I use cut up to fit the niche and use tile trim around the edges?

 

[king of pipes]

Thanks for those recommendations.

This 6mm wedi board would be used throughout the bathroom I assume. So for the back and four sides of the niche I wouldn't be using metro tiles. Is there something I can get which matches the colour of the metro tiles. Would it be a white tile I use cut up to fit the niche and use tile trim around the edges?

Coloured glass looks good or mosaic tiles there's no need to use Wedi on the whole bathroom you can use plasterboard if you use a good quality tanking kit before tiling, just use Wedi on the niche be careful with trims they are a weak spot for leaks .