Hydraulic load from dishwasher when connected to kitchen sink?

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by Jona77, Feb 18, 2020.

  1. Jona77

    Jona77 New Member

    Joined:
    Feb 8, 2020
    Location:
    Halifax
    Hi!

    I'm trying to size a drain pipe branch and my national plumbing code book says for hydraulic load of domestic dishwasher:

    "1 1/2 no load when connected to garbage grinder or domestic sink"

    I want to verify this means the hydraulic load from my entire kitchen (dishwasher+sink) is just going to be the 1.5 mentioned on the same table for domestic sink since my dishwasher is plumbed into my sink before the trap or if I'm reading this wrong.. It's a little ambiguous to me!

    Also does anyone have any idea a general hydraulic load from a sump pump? It currently has a 1.5 inch outlet pipe.


    ALSO

    1. Code says max trap arm length for 2" pipe is 2.4 meters
    2. No length limit to wet vents.

    Does that mean I can run a 2.4 meter or less trap arm from my bathtub trap across my basement to the kitchen sink/dishwasher drain(kitchen sink being another 10ish feet away) and that will work as a wet vent?
     
    Last edited: Feb 18, 2020
  2. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Joined:
    Sep 2, 2004
    Occupation:
    Retired Systems engineer for defense industry.
    Location:
    New England
    As I understand it, wet vents are limited to a single bathroom group on the same floor, so probably can't use it between a bathroom and a kitchen.
     
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  4. Jona77

    Jona77 New Member

    Joined:
    Feb 8, 2020
    Location:
    Halifax
    I'm not sure I didn't see that specifically said anywhere.. this is in wacky old canada though.. This picture is in the figures for wet venting though.. Basically would be a similar setup minus drinking fountain, lavatory basin, and water closet.

    [​IMG]
     
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