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Discuss Soil Pan Misaligned - Wall Hung Toilet in the Plumbing Forum area at

  1. Phil5698

    Phil5698 New Member

    Good morning, I'm looking for some advice please. I'm a DIYer. I'm fitting a wall hung toilet in our downstairs toilet but the frame is very close to the soil pipe, it has to be really for it to work. My issue is (other than not planning it well) the soil pipe alignment. Pics below:

    [​IMG] [​IMG] [​IMG]

    As you can see, I have ~100mm drop to make in about 120mm horizontal distance. Although I have secured the frame I can move it (although drilling into the concrete floor again isn't something I'll look forward to). I've looked at the various connectors that might work - 100mm offset pan connector and a short flexible connector, but I'm not sure either will work. They're 15-20 quid a go so don't want to keep buying them in the hope that something may work. I also considered a 45 degree connector, but again not sure if the angle will be right. My other thought was buying a 90 degree flexible hose and not using the provided black one you can see in the pics, but that seems to be designed to sit in the mounting point, whereas the flexible one probably won't.

    This picture will show why moving it right - which seems to be the obvious solution isn't ideal, as it will no longer then sit under the window.


    Can anyone offer some advice please? Is this resolvable? Thanks in advance.
    Last edited: Nov 26, 2018
  2. Ben-gee

    Ben-gee Plumber Top Contributor!!

    Do not use flexible. Also do not use pan connector at the stack. The pan connector is behind the orange blanking cup.
    From stack use rigid 110 and an angled socket, which you can marry up with the black outlet pipe - which you should angle downwards. If necessary you can get an adjustable 110 which you cut off at the appropriate length to give the angle required, this can be tricky but is the most robust way of doing it in the space you have. Don't forget you can also shorten the black pipe if needed.
    It is definitely doable.
    • Like Like x 2
  3. snowhead

    snowhead Plumber

    As above don't use a pan connector into the stack.
    It should work with a short piece of soil pipe straight out the stack into a 135 bend as link below, then up to the frame elbow fitting cut down and turned 45 degrees dwn.

    Draw the layout on the floor or paper to scale with the pipe end positions and it'll show it's possible.
  4. Phil5698

    Phil5698 New Member

  5. snowhead

    snowhead Plumber

    You'll need the adapter into the 135 bend for the cut down frame pan connector to fit in.

    I don't think you'll need it but you can get the 135 without 1 socket end so it fits straight into the stack if space is short, might be worth buying both, you can take it back if not used;

    Measure twice (or more) then cut !
    If in doubt, cut too long then cut down as required.
    • Agree Agree x 1
  6. Phil5698

    Phil5698 New Member

    Great. With not having any soil pipe lying around, that may be the better option. I won't have to buy any soil pipe then and less cuts to make. Just need to get the cut on the frame pan right.

    So - 45 elbow, into stack, adapter into elbow, frame pipe cut down into elbow/adapter.

    Thanks for the advice on the cutting. I only have a hacksaw. I've read taping some paper round the pipe give a straight edge is a good way of getting the cut straight. I've never tried to cut anything bigger than 40mm before.

    Thank you very much for the advice.
    Last edited: Nov 26, 2018
  7. Phil5698

    Phil5698 New Member

    • Like Like x 1
    Last edited: Nov 26, 2018
  8. Chalked

    Chalked Plumber GSR

    Also your frame is too low!
    There is a mark on the left leg of the frame. Which o think is .7m. That is a measurement from fished floor.
    I presume you will have some sort of tile, or other finish. This needs to be allowed for.
    I normally allow 20mm for floor finish, then add the frame allowance, then another 15mm. This will then give you a toilet seat height of 16 inch, which is a normal height in this country.
    • Like Like x 2
  9. Phil5698

    Phil5698 New Member

    I appreciate you pointing that out. I'll raise it later. I do recall something in the instructions about that now you come to mention it. Fortunately it's only fixing into wood I'll have to move. I'm glad I posted :)
  10. Phil5698

    Phil5698 New Member

    I'm waiting for the "you need to call a plumber" comments lol if you don't try you don't learn is my motto
  11. Jones82

    Jones82 GSR

    You can raise the frame using the chrome bolts on the bottom left and right of the frame. Undo them lift the metal frame and it will slide up on the steel "legs" Then tighten the bolts again.

    You'll also have to unscrew it from the wooden batons before it will slide up, then screw in again at the new height.
    • Like Like x 1
  12. oz-plumber

    oz-plumber Plumber

    By looking at the pics, I feel that a 45 bend will be too much angle.

    Can you guys get 30 bends?

    Also, the OP better get this right. If it leaks in the future, after the wall has been finished, it's back to square 1.
    It should be noted that there are installation instructions and they should be read an installed as per instructions.
    I have come across a few of these installations that have not been installed correctly and they are messy and costly to repair
    • Like Like x 1
  13. Ben-gee

    Ben-gee Plumber Top Contributor!!

    That's why I say no pan connector, no flexis. The adjustable fitting OP shows is a ring seal one, I personally wouldn't use that either. Marley make an adjustable two part solvent weld one; a slow bend with markings showing degrees, you cut this at the appropriate place on the bend and then solvent weld the collar part. Like I said it is tricky to do but extremely robust long term. I think there are two sizes 0-15degrees and 0-30. These are a real get you out of trouble fitting, if like me you don't wish to bury a flexi and just hope.
    I too have seen expensive failures when people try to cut corners...
    These fittings are quite pricey but really - spend the extra £20 now and save hundreds down the line.
    • Like Like x 1
  14. Phil5698

    Phil5698 New Member

    I'm going to raise the frame tonight, which will increase the angle, and see what it's like. I've bought the single ended 135 bend that slots straight into the soil pipe. I'll fit and see how close I am. If it's not close enough, couldn't I get the double ended 135 bend adjust the length of the pipe between the soil pipe and the bend until the angle lines up?

    I must admit I am nervous about this. I can't think of a way to really test it, as the toilet doesn't go on until right at the end really.
    Last edited: Nov 27, 2018
  15. Phil5698

    Phil5698 New Member

    I used the 45 elbow into stack, trimmed the pan connector about 30mm and it seems to be ok.


    I raised the frame to the suggested height - 720, but to make the angle work on the pan pipe I had to raise it by a further 20mm, so I'm about 740mm from unfinished floor height to the 0.7m marker on the frame, I'm guessing this will be ok.

    From what I can see, the most likely place I'll get a leak is going into the stack. That section is probably 20 years old but there's no shifting it.


    I was thinking about giving this a good dose of silicone sealant all the way around. I appreciate it shouldn't be necessary with push fit and it's a bit of a bodge, but it seems like an extra layer of protection against a leak.
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