5m waste pipe run, what diameter pipe?

Discussion in 'Kitchen Fitters' Talk' started by Ben W, Feb 2, 2016.

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  1. Ben W

    Ben W Member

    I need to connect a sink and dishwasher waste pipe to my external stack. The pipe run will be just under 5m.

    What is the minimum diameter pipe i can use. Ideally i do not want to put in an AAV.

    Many thanks,

    Ben
     
    Ben W, Feb 2, 2016
    #1
  2. KIAB

    KIAB Super Member

    40mm & use solvent weld,not push fit & you shouldn't need AAV as your stack will have a vent.
     
    KIAB, Feb 2, 2016
    #2
    Ben W likes this.
  3. Phil the Paver

    Phil the Paver Screwfix Select

    There is no reason why you couldn't go down to 32mm, use solvent weld as KIAB suggests.
     
    Phil the Paver, Feb 2, 2016
    #3
  4. KIAB

    KIAB Super Member

    I kept it simple, using 40mm, as the sink trap will 40mm, & dishwasher might use standpipe,again 40mm, it saves on using reducers to step down from 40mm to 32mm.
     
    KIAB, Feb 2, 2016
    #4
  5. Ben W

    Ben W Member

    Many thanks guys.

    Ben
     
    Ben W, Feb 2, 2016
    #5

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