• I posted this floorplan not long ago and thought it'd be an idea to move the toilet from the back wall to under the stairs to open up the back room more - but I think I omitted the fact that it's a mid-terrace.

    Does that rule out the possibility of such a shift, as the soil pipe wouldn't have sufficient drop to cover 5m or so to the back wall/main soil pipe?

    The other option would be using a saniflo/macerator type system - anyone had any experience of them?

  • Depends on how the soil pipe runs under your flooring.
    If you follow 1:40 drop, then its 25mm every metre, and 5m length (I imagine it would be less than this) would be 125mm.

    You should be ok I would think?

  • Oh, great! For some reason I thought the drop had to be considerably steeper, thanks!

    The floors en route to outside will be coming up as they all old (90s) cracked tiles so hopefully enough space in the void below.

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