Do I need to vent kitchen sink waste?

Discussion in 'Plumbing and Central Heating' started by a1topdog, 19 Mar 2020.

  1. a1topdog

    a1topdog

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    I need to run approx 4m straight length of 40mm kitchen waste. This will be connected to the kitchen sink and a dishwasher. I will put rodding points at either end of the 4m pipe.

    Do I also need to vent the pipe? I thought I read that if the pipe was over 3m a vent is needed, but I can't find that reference now.
     
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  3. denso13

    denso13

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    I'd go with 50mm pipe for that length and it shouldn't need vented. You can reduce it to 40mm at the sink.

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    Last edited: 19 Mar 2020
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  4. a1topdog

    a1topdog

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    Thanks, that sounds ideal. You you get a 50mm to 40mm tee connector? I've had a look and can't find one.
     
  5. denso13

    denso13

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  6. Madrab

    Madrab

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    You need to watch the ABS from Toolstation. I've tried the Aqualflow pipe recently, the pipe is much heavier than other ABS pipe (OSMA/Floplast) and is around a mill larger, so if it's not their pipe with their fittings then make sure you use plenty of glue.
     
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  7. a1topdog

    a1topdog

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    Thanks for the advice all.
     
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