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Grohe wall hung toilet

Discussion in 'Plumbing and Central Heating' started by LeeST, 4 Feb 2021.

  1. LeeST

    LeeST

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    Hi guys,

    I am going to start ripping out my downstairs toilet. It’s a very narrow space and the wife wants a close coupled back to the wall toilet. This was ok until I realised the soil pipe that comes out the floor is offset. So offset that from what I can work out the toilet as a back to the wall unit would only go over the pipe if this was also offset. But it would be too close to one wall then.

    This leads to me to thinking about a wall hung toilet. I’ve done one before in my en suite but that was on an external wall. This one would be an internal wall so just plasterboard.

    The issue may well be that I don’t believe it is even a stud wall. If it’s the same as my en suite it was something called a laminate system. Basically a sheet of 12.5mm either side and a sheet of 18mm up the centre.

    is there a safe way to attach this frame? Obviously the feet take a lot of the load but I’m unsure how much load the top brackets take as it’s sat on.

    I did consider a sheet of ply behind the frame fixed with something like those gripits to distribute any load then the frame fixed to that and into the wall.

    Anyone any experience of these on walls such as this?

    thanks in advance
     
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  3. motorbiking

    motorbiking

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    Can you not go with the purpose build frames for around £150 they make the job a lot easier.
     
  4. LeeST

    LeeST

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    Yes I’m going to get a grohe frame. These are bolted to the floor but also two bolts into the wall.
    When I did my bathroom with one I bolted it to the outside wall. It was solid.

    my downstairs toilet is a internal wall. It’s not a stud wall, basically its 3 sheets of plasterboard dot and dabbed. So the two bolts going into this is what I’m concerned about.

    I’m guessing as you sit in it there will be some pull force.
    Just wondered if anyone had experience of these with this kind of wall system.
     
  5. motorbiking

    motorbiking

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    Could you put a horizontal noggin between the two studs or side walls at the height the frame needs to bolt to the wall? Most of the load is going down. So the horizontal attachment points don’t need a lot
     
  6. dilalio

    dilalio

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    Stud the wall out (creating another timber stud wall in front) and fit the frame between 2 studs in the centre. Fix frame to the studs by screwing through the metal shoulders, into the left and right studs.
     
  7. LeeST

    LeeST

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    There isn’t any studs. If I remember right I think it’s a 2x2 frame around the outside then they fit 12.5mm on to one side. Then go round the other side and stick some 18mm on in the middle then fit 12.5mm on on the other side fixed to the frame and all dot and dabbed.

    I was wondering the same. Either some 4x2 fixed along the width and the frame fastened to this. I guess it’s more the strength and integrity Of the wall I’m concerned with. Although I’m now wondering if it isn’t actually stronger than a traditional stud wall as the pb at this side is basically attached directly to it all at the other side.

    we are all pretty light in our house so I’m confident. Just a bit concerned when a larger member of the family sits on it!!!
     
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  9. LeeST

    LeeST

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    can’t stud up to the ceiling as I’d lose too much wall. Was going to box the frame in and put a shelf on top.

    I suppose i could stud up to the frame and fasten that to both side walls and the back then bolt the frame to that.
    I have a tendency to over engineer things so hopefully that should do it
     
  10. dilalio

    dilalio

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    You could stud all the way up to the lid and then create niches in the wall above the pan, with led downlights shining down into the niches. :D
     
  11. MeldrewsMate

    MeldrewsMate

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    These wall hung toilets need a stable mounting, so you're right to build it strong. That isn't over-engineering, it's doing what's right for the job to work well and last a long time. A wall that allows the frame to move will encourage cracks in the surrounding decoration/tiling.

    And it doesn't have to be Geeerman. There are British made wall hung systems.
     
  12. LeeST

    LeeST

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    appears I’m lying. The one I did upstairs is Gerberit. Perhaps I should learn to read properly

    have you any experience of other brands that are good?

    I was drawn to Grohe because I thought I had used that before and want one with access through the flush plate
     
  13. MeldrewsMate

    MeldrewsMate

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    I have a Dudley frame. It's branded Dudley, but I have no evidence to show it was actually made in the UK...too lazy to check at the time. The thing I most like about it is that the wall mountings are at about the same height as the top of the toilet pan and, as the bending moment (from a large ar*e perched on the crapper) is maximum at just that point, the frame will bend the least. Compare that to the frames fixed at the top. All this produces a very stable structure, better resistant to loading deformation and therefore to surface decoration (tiles and grout) cracking, as long as the wall behind is stable. Another advantage, unrealised before now, is that on installations below windows the extra mass of masonry above the mounting points means the fixings will be better supported.
    Anyhow, I've had mine in for 8 years now and, despite some enthusiastic bog gymnastics, it's stayed in place and stable.
     
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