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Fabian_3000 t1_ixlpkkj wrote

Try keeping the underflor siphon wet - I imagine it is for water from floor-cleaning etc? Those siphons just tend to smell bad, if they dry up.

I remember working in an office-space where some old guy watered the floor-siphon in one of the bathrooms on a weekly basis to prevent it from smelling like shit.

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otr_otr_otr OP t1_ixlvqt4 wrote

The underfloor siphon actually is for the toilet (and I think the shower and sink also go through there). Meaning "it is located underfloor".

​

So:

  • Sink: Has a siphon directly underneath, then feeds into the underfloor one.
  • Show: Assume the same.
  • Toilet: Directly into the underfloor one.

​

All of these look alright (have water in them, plumber also didn't see anything odd when opening the underfloor one).

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