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Saniflo question

Discussion in 'Plumbing and Central Heating' started by rich4nancy, 11 Feb 2019.

  1. rich4nancy

    rich4nancy

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    i’ll keep this as short as poss. I have a saniflo (sanislim) in my ensuite (I know, don’t say it...had no choice) works fine but occasionally omits a bad smell (drain/methane type) it’s quite random. Have treated with bleach etc but it returns, then sometimes disappears or hangs around like the proverbial bad smell ! The discharge rises vertically approx 2.5m into roof in 22mm copper then into I think 32mm plastic and gravity falls to the stack top connection. Having done a bit of research etc is it possible that a syphoning effect occurs from time to time due to high drop on stack and poss draws water from traps ? With it being quite random ? If so could I fit a 32mm non return valve on the waste in the roof to help with this ? Into unit is shower, hand basin and toilet (strictly no number 2’s tho !) any help/suggestions gratefully received ! Cheers
     
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  3. The non-return valve won't stop siphoning (which is unlikely anyway) and there is already a non return in the Saniflo outlet.

    If you can locate which appliance is venting - most likely the shower but could be the basin then a trap with an AAV will stop the trap emptying.

    for example - https://www.screwfix.com/p/mcalpine-swivel-p-trap-white-32mm/96792
     
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  4. Dan Robinson

    Dan Robinson

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    @justpumps has a fetish for these abominations. I just advise you to burn your house down and claim on the insurance.

    But then, you knew that already :).
     
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  5. rich4nancy

    rich4nancy

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    Thanks Dan !! It wasn’t ideal to have one admittedly, however we had no choice. In terms of its performance it does the job...just this random smell is becoming annoying. Hopefully the saniflo fetishists as you call them maybe able to advise..cheers
     
  6. Some dude on here likes diggin in saniflos so much he would probably pay you to have a go..My advice,same as Dan's
     
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  7. Dan Robinson

    Dan Robinson

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    There's always a choice. :p
     
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  9. just pumps

    just pumps

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    Emm, Saniflo fetish I think not! :LOL:
    With the smell being random I`m not convinced the sani is the cause tbh. Next time the smell returns poke a straw or slim pencil down through the grate of the basin and shower outlet as far as you can go. When removed there should be water on the bottom of the straw/ pencil, if there isn`t then that waste trap has been sucked dry as another member mentioned above.
    Failing that come back to us.
     
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  10. Yes,thats him.does 3 dozen a week...luvs em.
     
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  11. just pumps

    just pumps

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    Luv the money they bring in more like it. :D
     
  12. Yum.
     
  13. rich4nancy

    rich4nancy

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    Justpumps will do. My wife is very efficient at pointing out the smell then somehow making me feel guilty for not sorting it !! Hence why I’m on here cheers
     
  14. just pumps

    just pumps

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    Sadly it is a fact of life that they smell smells we don`t.
     
  15. DIYnot Local

    DIYnot Local

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